/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 11:02:32,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 11:02:32,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 11:02:32,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 11:02:32,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 11:02:32,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 11:02:32,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 11:02:32,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 11:02:32,295 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 11:02:32,299 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 11:02:32,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 11:02:32,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 11:02:32,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 11:02:32,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 11:02:32,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 11:02:32,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 11:02:32,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 11:02:32,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 11:02:32,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 11:02:32,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 11:02:32,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 11:02:32,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 11:02:32,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 11:02:32,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 11:02:32,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 11:02:32,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 11:02:32,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 11:02:32,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 11:02:32,341 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-21 11:02:32,362 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 11:02:32,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 11:02:32,363 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 11:02:32,363 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 11:02:32,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 11:02:32,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 11:02:32,366 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 11:02:32,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 11:02:32,366 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 11:02:32,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 11:02:32,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 11:02:32,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 11:02:32,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 11:02:32,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 11:02:32,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 11:02:32,368 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 11:02:32,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 11:02:32,368 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 11:02:32,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 11:02:32,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 11:02:32,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 11:02:32,369 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 11:02:32,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 11:02:32,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 11:02:32,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 11:02:32,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 11:02:32,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 11:02:32,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 11:02:32,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 11:02:32,370 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 11:02:32,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 11:02:32,371 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 11:02:32,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 11:02:32,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 11:02:32,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 11:02:32,836 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-21 11:02:32,837 INFO L275 PluginConnector]: CDTParser initialized [2021-08-21 11:02:32,838 INFO L432 ainManager$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 11:02:32,897 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce3510f20/aa061382bb5842f59d854cb891991730/FLAG457e53e7b [2021-08-21 11:02:33,369 INFO L306 CDTParser]: Found 1 translation units. [2021-08-21 11:02:33,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2021-08-21 11:02:33,385 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce3510f20/aa061382bb5842f59d854cb891991730/FLAG457e53e7b [2021-08-21 11:02:33,730 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce3510f20/aa061382bb5842f59d854cb891991730 [2021-08-21 11:02:33,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 11:02:33,733 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-21 11:02:33,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-21 11:02:33,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-21 11:02:33,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-21 11:02:33,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:02:33" (1/1) ... [2021-08-21 11:02:33,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fc5cfcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:33, skipping insertion in model container [2021-08-21 11:02:33,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:02:33" (1/1) ... [2021-08-21 11:02:33,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-21 11:02:33,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-21 11:02:33,996 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 11:02:34,036 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 11:02:34,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-21 11:02:34,051 INFO L203 MainTranslator]: Completed pre-run [2021-08-21 11:02:34,104 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 11:02:34,113 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 11:02:34,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-21 11:02:34,155 INFO L208 MainTranslator]: Completed translation [2021-08-21 11:02:34,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:34 WrapperNode [2021-08-21 11:02:34,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-21 11:02:34,156 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 11:02:34,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 11:02:34,156 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 11:02:34,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:34" (1/1) ... [2021-08-21 11:02:34,189 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:34" (1/1) ... [2021-08-21 11:02:34,207 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 11:02:34,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 11:02:34,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 11:02:34,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 11:02:34,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:34" (1/1) ... [2021-08-21 11:02:34,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:34" (1/1) ... [2021-08-21 11:02:34,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:34" (1/1) ... [2021-08-21 11:02:34,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:34" (1/1) ... [2021-08-21 11:02:34,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:34" (1/1) ... [2021-08-21 11:02:34,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:34" (1/1) ... [2021-08-21 11:02:34,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:34" (1/1) ... [2021-08-21 11:02:34,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 11:02:34,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 11:02:34,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 11:02:34,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 11:02:34,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:34" (1/1) ... [2021-08-21 11:02:34,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 11:02:34,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:34,294 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 11:02:34,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 11:02:34,341 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-08-21 11:02:34,341 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-08-21 11:02:34,341 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-08-21 11:02:34,341 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-08-21 11:02:34,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-21 11:02:34,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-08-21 11:02:34,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-21 11:02:34,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-21 11:02:34,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-21 11:02:34,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-08-21 11:02:34,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 11:02:34,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 11:02:34,345 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 11:02:34,754 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 11:02:34,755 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-21 11:02:34,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:02:34 BoogieIcfgContainer [2021-08-21 11:02:34,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 11:02:34,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 11:02:34,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 11:02:34,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 11:02:34,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:02:33" (1/3) ... [2021-08-21 11:02:34,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@423d74f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:02:34, skipping insertion in model container [2021-08-21 11:02:34,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:34" (2/3) ... [2021-08-21 11:02:34,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@423d74f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:02:34, skipping insertion in model container [2021-08-21 11:02:34,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:02:34" (3/3) ... [2021-08-21 11:02:34,766 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2021-08-21 11:02:34,771 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 11:02:34,772 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 11:02:34,772 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 11:02:34,772 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 11:02:34,810 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,810 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,810 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,810 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,810 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,811 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,811 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,811 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,811 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,811 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,812 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,812 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,812 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,812 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,812 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,812 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,813 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,813 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,813 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,814 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,814 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,814 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,814 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,815 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,815 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,815 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,815 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,816 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,816 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,816 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,817 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,817 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,817 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,818 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,818 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,818 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,818 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,819 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,819 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,819 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,819 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,819 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,819 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,820 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,820 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,820 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,820 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,820 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,820 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,821 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,822 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,822 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,823 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,823 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,823 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,823 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,823 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,824 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,824 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,824 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,828 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,829 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,829 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,829 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,829 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,829 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,836 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,836 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,837 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,837 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,837 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,837 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,843 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-21 11:02:34,890 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 11:02:34,897 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 11:02:34,898 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 11:02:34,920 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 68 transitions, 146 flow [2021-08-21 11:02:34,980 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 933 states, 932 states have (on average 2.9313304721030042) internal successors, (2732), 932 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:34,985 INFO L276 IsEmpty]: Start isEmpty. Operand has 933 states, 932 states have (on average 2.9313304721030042) internal successors, (2732), 932 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:34,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:02:34,998 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:34,998 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:34,999 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:35,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:35,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1527992754, now seen corresponding path program 1 times [2021-08-21 11:02:35,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:35,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134332159] [2021-08-21 11:02:35,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:35,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:35,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:35,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134332159] [2021-08-21 11:02:35,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134332159] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:02:35,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:02:35,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 11:02:35,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156697322] [2021-08-21 11:02:35,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 11:02:35,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:35,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 11:02:35,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:02:35,480 INFO L87 Difference]: Start difference. First operand has 933 states, 932 states have (on average 2.9313304721030042) internal successors, (2732), 932 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:35,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:35,712 INFO L93 Difference]: Finished difference Result 1756 states and 4724 transitions. [2021-08-21 11:02:35,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:02:35,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 11:02:35,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:35,742 INFO L225 Difference]: With dead ends: 1756 [2021-08-21 11:02:35,742 INFO L226 Difference]: Without dead ends: 1425 [2021-08-21 11:02:35,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:02:35,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-08-21 11:02:35,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1120. [2021-08-21 11:02:35,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.7184986595174263) internal successors, (3042), 1119 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:35,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3042 transitions. [2021-08-21 11:02:35,874 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3042 transitions. Word has length 32 [2021-08-21 11:02:35,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:35,875 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 3042 transitions. [2021-08-21 11:02:35,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:35,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3042 transitions. [2021-08-21 11:02:35,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 11:02:35,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:35,883 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:35,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 11:02:35,884 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:35,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:35,886 INFO L82 PathProgramCache]: Analyzing trace with hash 728020066, now seen corresponding path program 1 times [2021-08-21 11:02:35,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:35,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143628411] [2021-08-21 11:02:35,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:35,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:36,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:36,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143628411] [2021-08-21 11:02:36,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143628411] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:02:36,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:02:36,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:02:36,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768781458] [2021-08-21 11:02:36,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:02:36,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:36,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:02:36,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:02:36,159 INFO L87 Difference]: Start difference. First operand 1120 states and 3042 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:36,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:36,321 INFO L93 Difference]: Finished difference Result 2025 states and 5412 transitions. [2021-08-21 11:02:36,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:02:36,322 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 11:02:36,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:36,332 INFO L225 Difference]: With dead ends: 2025 [2021-08-21 11:02:36,332 INFO L226 Difference]: Without dead ends: 1758 [2021-08-21 11:02:36,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 131.3ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:02:36,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-08-21 11:02:36,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1270. [2021-08-21 11:02:36,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 2.7328605200945626) internal successors, (3468), 1269 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:36,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 3468 transitions. [2021-08-21 11:02:36,378 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 3468 transitions. Word has length 37 [2021-08-21 11:02:36,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:36,380 INFO L470 AbstractCegarLoop]: Abstraction has 1270 states and 3468 transitions. [2021-08-21 11:02:36,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:36,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 3468 transitions. [2021-08-21 11:02:36,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 11:02:36,383 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:36,384 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:36,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 11:02:36,384 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:36,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:36,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1321610138, now seen corresponding path program 1 times [2021-08-21 11:02:36,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:36,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285331972] [2021-08-21 11:02:36,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:36,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:36,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:36,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285331972] [2021-08-21 11:02:36,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285331972] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:02:36,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:02:36,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:02:36,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421348348] [2021-08-21 11:02:36,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:02:36,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:36,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:02:36,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:02:36,595 INFO L87 Difference]: Start difference. First operand 1270 states and 3468 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:36,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:36,742 INFO L93 Difference]: Finished difference Result 2062 states and 5444 transitions. [2021-08-21 11:02:36,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:02:36,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 11:02:36,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:36,783 INFO L225 Difference]: With dead ends: 2062 [2021-08-21 11:02:36,783 INFO L226 Difference]: Without dead ends: 1758 [2021-08-21 11:02:36,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:02:36,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-08-21 11:02:36,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1397. [2021-08-21 11:02:36,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 2.683381088825215) internal successors, (3746), 1396 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:36,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 3746 transitions. [2021-08-21 11:02:36,832 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 3746 transitions. Word has length 37 [2021-08-21 11:02:36,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:36,832 INFO L470 AbstractCegarLoop]: Abstraction has 1397 states and 3746 transitions. [2021-08-21 11:02:36,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:36,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 3746 transitions. [2021-08-21 11:02:36,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 11:02:36,836 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:36,836 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:36,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 11:02:36,837 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:36,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:36,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1681354572, now seen corresponding path program 2 times [2021-08-21 11:02:36,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:36,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643084372] [2021-08-21 11:02:36,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:36,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:36,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:36,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643084372] [2021-08-21 11:02:36,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643084372] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:02:36,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:02:36,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:02:36,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858952792] [2021-08-21 11:02:36,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:02:36,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:36,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:02:36,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:02:36,994 INFO L87 Difference]: Start difference. First operand 1397 states and 3746 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:37,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:37,171 INFO L93 Difference]: Finished difference Result 2318 states and 6148 transitions. [2021-08-21 11:02:37,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:02:37,173 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 11:02:37,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:37,183 INFO L225 Difference]: With dead ends: 2318 [2021-08-21 11:02:37,184 INFO L226 Difference]: Without dead ends: 1987 [2021-08-21 11:02:37,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:02:37,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-08-21 11:02:37,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1514. [2021-08-21 11:02:37,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 2.701916721744878) internal successors, (4088), 1513 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4088 transitions. [2021-08-21 11:02:37,235 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4088 transitions. Word has length 37 [2021-08-21 11:02:37,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:37,237 INFO L470 AbstractCegarLoop]: Abstraction has 1514 states and 4088 transitions. [2021-08-21 11:02:37,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:37,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4088 transitions. [2021-08-21 11:02:37,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 11:02:37,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:37,240 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:37,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 11:02:37,240 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:37,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:37,241 INFO L82 PathProgramCache]: Analyzing trace with hash -360140322, now seen corresponding path program 1 times [2021-08-21 11:02:37,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:37,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628488783] [2021-08-21 11:02:37,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:37,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:37,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:37,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628488783] [2021-08-21 11:02:37,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628488783] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:02:37,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:02:37,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:02:37,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880137466] [2021-08-21 11:02:37,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:02:37,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:37,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:02:37,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:02:37,435 INFO L87 Difference]: Start difference. First operand 1514 states and 4088 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:37,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:37,565 INFO L93 Difference]: Finished difference Result 2203 states and 5812 transitions. [2021-08-21 11:02:37,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:02:37,566 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 11:02:37,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:37,576 INFO L225 Difference]: With dead ends: 2203 [2021-08-21 11:02:37,576 INFO L226 Difference]: Without dead ends: 2051 [2021-08-21 11:02:37,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:02:37,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-08-21 11:02:37,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1539. [2021-08-21 11:02:37,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 2.6937581274382314) internal successors, (4143), 1538 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:37,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 4143 transitions. [2021-08-21 11:02:37,631 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 4143 transitions. Word has length 42 [2021-08-21 11:02:37,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:37,632 INFO L470 AbstractCegarLoop]: Abstraction has 1539 states and 4143 transitions. [2021-08-21 11:02:37,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:37,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 4143 transitions. [2021-08-21 11:02:37,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 11:02:37,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:37,634 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:37,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 11:02:37,635 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:37,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:37,637 INFO L82 PathProgramCache]: Analyzing trace with hash -326136346, now seen corresponding path program 2 times [2021-08-21 11:02:37,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:37,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608474252] [2021-08-21 11:02:37,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:37,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:37,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:37,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608474252] [2021-08-21 11:02:37,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608474252] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:02:37,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:02:37,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:02:37,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370535077] [2021-08-21 11:02:37,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:02:37,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:37,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:02:37,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:02:37,773 INFO L87 Difference]: Start difference. First operand 1539 states and 4143 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:37,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:37,982 INFO L93 Difference]: Finished difference Result 2907 states and 7732 transitions. [2021-08-21 11:02:37,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 11:02:37,983 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 11:02:37,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:37,998 INFO L225 Difference]: With dead ends: 2907 [2021-08-21 11:02:37,998 INFO L226 Difference]: Without dead ends: 2461 [2021-08-21 11:02:37,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 142.2ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-08-21 11:02:38,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2021-08-21 11:02:38,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 1731. [2021-08-21 11:02:38,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1730 states have (on average 2.707514450867052) internal successors, (4684), 1730 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:38,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 4684 transitions. [2021-08-21 11:02:38,056 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 4684 transitions. Word has length 42 [2021-08-21 11:02:38,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:38,056 INFO L470 AbstractCegarLoop]: Abstraction has 1731 states and 4684 transitions. [2021-08-21 11:02:38,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:38,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 4684 transitions. [2021-08-21 11:02:38,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 11:02:38,060 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:38,061 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:38,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 11:02:38,061 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:38,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:38,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1453256668, now seen corresponding path program 3 times [2021-08-21 11:02:38,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:38,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984729166] [2021-08-21 11:02:38,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:38,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:38,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:38,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:38,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984729166] [2021-08-21 11:02:38,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984729166] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:02:38,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:02:38,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:02:38,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724414212] [2021-08-21 11:02:38,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:02:38,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:38,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:02:38,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:02:38,191 INFO L87 Difference]: Start difference. First operand 1731 states and 4684 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:38,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:38,349 INFO L93 Difference]: Finished difference Result 3149 states and 8380 transitions. [2021-08-21 11:02:38,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 11:02:38,349 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 11:02:38,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:38,369 INFO L225 Difference]: With dead ends: 3149 [2021-08-21 11:02:38,370 INFO L226 Difference]: Without dead ends: 2834 [2021-08-21 11:02:38,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 105.1ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:02:38,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-08-21 11:02:38,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 1941. [2021-08-21 11:02:38,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 2.6943298969072167) internal successors, (5227), 1940 states have internal predecessors, (5227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:38,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 5227 transitions. [2021-08-21 11:02:38,431 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 5227 transitions. Word has length 42 [2021-08-21 11:02:38,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:38,431 INFO L470 AbstractCegarLoop]: Abstraction has 1941 states and 5227 transitions. [2021-08-21 11:02:38,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:38,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 5227 transitions. [2021-08-21 11:02:38,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 11:02:38,434 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:38,435 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:38,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 11:02:38,435 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:38,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:38,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1018888227, now seen corresponding path program 1 times [2021-08-21 11:02:38,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:38,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437604030] [2021-08-21 11:02:38,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:38,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:38,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:38,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437604030] [2021-08-21 11:02:38,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437604030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:38,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352977656] [2021-08-21 11:02:38,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:38,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:38,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:38,580 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:38,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 11:02:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:38,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 11:02:38,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:39,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352977656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:39,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:39,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 11:02:39,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704846852] [2021-08-21 11:02:39,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:02:39,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:39,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:02:39,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:02:39,216 INFO L87 Difference]: Start difference. First operand 1941 states and 5227 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:39,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:39,429 INFO L93 Difference]: Finished difference Result 3261 states and 8492 transitions. [2021-08-21 11:02:39,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 11:02:39,430 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 11:02:39,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:39,458 INFO L225 Difference]: With dead ends: 3261 [2021-08-21 11:02:39,459 INFO L226 Difference]: Without dead ends: 2781 [2021-08-21 11:02:39,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 214.3ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-08-21 11:02:39,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2021-08-21 11:02:39,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 2030. [2021-08-21 11:02:39,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 2.6638738294726467) internal successors, (5405), 2029 states have internal predecessors, (5405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:39,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 5405 transitions. [2021-08-21 11:02:39,526 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 5405 transitions. Word has length 47 [2021-08-21 11:02:39,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:39,527 INFO L470 AbstractCegarLoop]: Abstraction has 2030 states and 5405 transitions. [2021-08-21 11:02:39,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:39,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 5405 transitions. [2021-08-21 11:02:39,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 11:02:39,532 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:39,532 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:39,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-21 11:02:39,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:39,759 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:39,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:39,760 INFO L82 PathProgramCache]: Analyzing trace with hash 831780465, now seen corresponding path program 2 times [2021-08-21 11:02:39,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:39,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204840461] [2021-08-21 11:02:39,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:39,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:39,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:39,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204840461] [2021-08-21 11:02:39,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204840461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:39,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304262032] [2021-08-21 11:02:39,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:02:39,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:39,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:39,893 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:39,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 11:02:40,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:02:40,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:40,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 11:02:40,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:40,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304262032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:40,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:40,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 11:02:40,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732152424] [2021-08-21 11:02:40,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:02:40,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:40,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:02:40,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:02:40,576 INFO L87 Difference]: Start difference. First operand 2030 states and 5405 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:40,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:40,783 INFO L93 Difference]: Finished difference Result 3013 states and 7804 transitions. [2021-08-21 11:02:40,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 11:02:40,784 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 11:02:40,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:40,792 INFO L225 Difference]: With dead ends: 3013 [2021-08-21 11:02:40,792 INFO L226 Difference]: Without dead ends: 2861 [2021-08-21 11:02:40,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 229.6ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:02:40,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-08-21 11:02:40,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2064. [2021-08-21 11:02:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 2.6539020843431897) internal successors, (5475), 2063 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:40,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5475 transitions. [2021-08-21 11:02:40,862 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5475 transitions. Word has length 47 [2021-08-21 11:02:40,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:40,863 INFO L470 AbstractCegarLoop]: Abstraction has 2064 states and 5475 transitions. [2021-08-21 11:02:40,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:40,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5475 transitions. [2021-08-21 11:02:40,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 11:02:40,867 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:40,867 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:40,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:41,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-08-21 11:02:41,093 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:41,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:41,094 INFO L82 PathProgramCache]: Analyzing trace with hash -733078673, now seen corresponding path program 3 times [2021-08-21 11:02:41,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:41,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438830808] [2021-08-21 11:02:41,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:41,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:41,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:41,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:41,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438830808] [2021-08-21 11:02:41,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438830808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:41,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351676381] [2021-08-21 11:02:41,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:02:41,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:41,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:41,231 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:41,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 11:02:41,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 11:02:41,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:41,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 11:02:41,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:41,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351676381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:41,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:41,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 11:02:41,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692214635] [2021-08-21 11:02:41,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:02:41,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:41,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:02:41,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:02:41,814 INFO L87 Difference]: Start difference. First operand 2064 states and 5475 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:42,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:42,034 INFO L93 Difference]: Finished difference Result 3525 states and 9020 transitions. [2021-08-21 11:02:42,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 11:02:42,034 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 11:02:42,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:42,042 INFO L225 Difference]: With dead ends: 3525 [2021-08-21 11:02:42,042 INFO L226 Difference]: Without dead ends: 3045 [2021-08-21 11:02:42,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-08-21 11:02:42,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3045 states. [2021-08-21 11:02:42,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3045 to 2094. [2021-08-21 11:02:42,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2093 states have (on average 2.661729574773053) internal successors, (5571), 2093 states have internal predecessors, (5571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:42,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 5571 transitions. [2021-08-21 11:02:42,092 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 5571 transitions. Word has length 47 [2021-08-21 11:02:42,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:42,092 INFO L470 AbstractCegarLoop]: Abstraction has 2094 states and 5571 transitions. [2021-08-21 11:02:42,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:42,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 5571 transitions. [2021-08-21 11:02:42,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 11:02:42,096 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:42,096 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:42,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:42,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:42,321 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:42,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:42,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1704846823, now seen corresponding path program 4 times [2021-08-21 11:02:42,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:42,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131290915] [2021-08-21 11:02:42,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:42,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:42,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:42,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131290915] [2021-08-21 11:02:42,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131290915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:42,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287574733] [2021-08-21 11:02:42,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:02:42,454 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:42,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:42,457 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:42,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 11:02:42,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:02:42,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:42,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 11:02:42,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:43,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287574733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:43,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:43,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 11:02:43,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126820352] [2021-08-21 11:02:43,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:02:43,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:43,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:02:43,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:02:43,225 INFO L87 Difference]: Start difference. First operand 2094 states and 5571 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:43,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:43,604 INFO L93 Difference]: Finished difference Result 4570 states and 11964 transitions. [2021-08-21 11:02:43,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 11:02:43,605 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 11:02:43,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:43,615 INFO L225 Difference]: With dead ends: 4570 [2021-08-21 11:02:43,615 INFO L226 Difference]: Without dead ends: 3833 [2021-08-21 11:02:43,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 333.5ms TimeCoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2021-08-21 11:02:43,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2021-08-21 11:02:43,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 2235. [2021-08-21 11:02:43,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2235 states, 2234 states have (on average 2.6965085049239033) internal successors, (6024), 2234 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:43,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 6024 transitions. [2021-08-21 11:02:43,678 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 6024 transitions. Word has length 47 [2021-08-21 11:02:43,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:43,678 INFO L470 AbstractCegarLoop]: Abstraction has 2235 states and 6024 transitions. [2021-08-21 11:02:43,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:43,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 6024 transitions. [2021-08-21 11:02:43,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 11:02:43,682 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:43,682 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:43,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:43,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:43,897 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:43,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:43,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1024011455, now seen corresponding path program 5 times [2021-08-21 11:02:43,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:43,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446538859] [2021-08-21 11:02:43,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:43,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:43,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:44,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:44,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446538859] [2021-08-21 11:02:44,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446538859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:44,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588002677] [2021-08-21 11:02:44,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:02:44,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:44,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:44,002 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:44,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 11:02:44,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:02:44,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:44,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 11:02:44,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:44,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588002677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:44,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:44,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 11:02:44,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384285830] [2021-08-21 11:02:44,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:02:44,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:44,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:02:44,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:02:44,671 INFO L87 Difference]: Start difference. First operand 2235 states and 6024 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:45,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:45,007 INFO L93 Difference]: Finished difference Result 4350 states and 11284 transitions. [2021-08-21 11:02:45,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 11:02:45,008 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 11:02:45,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:45,019 INFO L225 Difference]: With dead ends: 4350 [2021-08-21 11:02:45,019 INFO L226 Difference]: Without dead ends: 3958 [2021-08-21 11:02:45,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 294.2ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-08-21 11:02:45,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3958 states. [2021-08-21 11:02:45,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3958 to 2423. [2021-08-21 11:02:45,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 2.7345169281585466) internal successors, (6623), 2422 states have internal predecessors, (6623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:45,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 6623 transitions. [2021-08-21 11:02:45,093 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 6623 transitions. Word has length 47 [2021-08-21 11:02:45,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:45,094 INFO L470 AbstractCegarLoop]: Abstraction has 2423 states and 6623 transitions. [2021-08-21 11:02:45,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:45,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 6623 transitions. [2021-08-21 11:02:45,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 11:02:45,098 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:45,098 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:45,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:45,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-21 11:02:45,312 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:45,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:45,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1295812541, now seen corresponding path program 6 times [2021-08-21 11:02:45,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:45,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129584033] [2021-08-21 11:02:45,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:45,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:45,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:45,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129584033] [2021-08-21 11:02:45,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129584033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:45,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100636056] [2021-08-21 11:02:45,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:02:45,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:45,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:45,418 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:45,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 11:02:45,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 11:02:45,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:45,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 11:02:45,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:46,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:46,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100636056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:46,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:46,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 11:02:46,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984814293] [2021-08-21 11:02:46,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:02:46,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:46,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:02:46,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:02:46,155 INFO L87 Difference]: Start difference. First operand 2423 states and 6623 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:46,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:46,840 INFO L93 Difference]: Finished difference Result 5771 states and 15228 transitions. [2021-08-21 11:02:46,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 11:02:46,841 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 11:02:46,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:46,852 INFO L225 Difference]: With dead ends: 5771 [2021-08-21 11:02:46,852 INFO L226 Difference]: Without dead ends: 4898 [2021-08-21 11:02:46,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 543.1ms TimeCoverageRelationStatistics Valid=381, Invalid=1425, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 11:02:46,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-08-21 11:02:46,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 2817. [2021-08-21 11:02:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2816 states have (on average 2.7169744318181817) internal successors, (7651), 2816 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:46,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 7651 transitions. [2021-08-21 11:02:46,925 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 7651 transitions. Word has length 47 [2021-08-21 11:02:46,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:46,925 INFO L470 AbstractCegarLoop]: Abstraction has 2817 states and 7651 transitions. [2021-08-21 11:02:46,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:46,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 7651 transitions. [2021-08-21 11:02:46,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 11:02:46,930 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:46,931 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:46,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:47,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:47,144 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:47,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:47,145 INFO L82 PathProgramCache]: Analyzing trace with hash -2036101166, now seen corresponding path program 7 times [2021-08-21 11:02:47,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:47,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920119119] [2021-08-21 11:02:47,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:47,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:47,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:47,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:47,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920119119] [2021-08-21 11:02:47,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920119119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:47,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621057762] [2021-08-21 11:02:47,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:02:47,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:47,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:47,284 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:47,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 11:02:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:47,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:02:47,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:48,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:48,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621057762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:48,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:48,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 11:02:48,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661682926] [2021-08-21 11:02:48,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 11:02:48,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:48,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 11:02:48,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-21 11:02:48,089 INFO L87 Difference]: Start difference. First operand 2817 states and 7651 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:48,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:48,383 INFO L93 Difference]: Finished difference Result 4391 states and 11330 transitions. [2021-08-21 11:02:48,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 11:02:48,384 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-21 11:02:48,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:48,394 INFO L225 Difference]: With dead ends: 4391 [2021-08-21 11:02:48,394 INFO L226 Difference]: Without dead ends: 3999 [2021-08-21 11:02:48,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 288.8ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-08-21 11:02:48,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3999 states. [2021-08-21 11:02:48,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3999 to 2932. [2021-08-21 11:02:48,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2932 states, 2931 states have (on average 2.6939611054247696) internal successors, (7896), 2931 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:48,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2932 states to 2932 states and 7896 transitions. [2021-08-21 11:02:48,460 INFO L78 Accepts]: Start accepts. Automaton has 2932 states and 7896 transitions. Word has length 52 [2021-08-21 11:02:48,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:48,460 INFO L470 AbstractCegarLoop]: Abstraction has 2932 states and 7896 transitions. [2021-08-21 11:02:48,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:48,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2932 states and 7896 transitions. [2021-08-21 11:02:48,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 11:02:48,478 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:48,478 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:48,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:48,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:48,701 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:48,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:48,702 INFO L82 PathProgramCache]: Analyzing trace with hash 397732806, now seen corresponding path program 1 times [2021-08-21 11:02:48,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:48,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326993090] [2021-08-21 11:02:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:48,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:48,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:48,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326993090] [2021-08-21 11:02:48,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326993090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:48,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836174331] [2021-08-21 11:02:48,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:48,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:48,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:48,836 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:48,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 11:02:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:49,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:02:49,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:49,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836174331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:49,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:49,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 11:02:49,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708535694] [2021-08-21 11:02:49,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 11:02:49,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:49,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 11:02:49,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:02:49,621 INFO L87 Difference]: Start difference. First operand 2932 states and 7896 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:49,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:49,887 INFO L93 Difference]: Finished difference Result 4087 states and 10594 transitions. [2021-08-21 11:02:49,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 11:02:49,888 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-21 11:02:49,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:49,896 INFO L225 Difference]: With dead ends: 4087 [2021-08-21 11:02:49,896 INFO L226 Difference]: Without dead ends: 3935 [2021-08-21 11:02:49,896 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 247.3ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-08-21 11:02:49,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2021-08-21 11:02:49,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 2982. [2021-08-21 11:02:49,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 2.6856759476685674) internal successors, (8006), 2981 states have internal predecessors, (8006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:49,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 8006 transitions. [2021-08-21 11:02:49,961 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 8006 transitions. Word has length 52 [2021-08-21 11:02:49,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:49,962 INFO L470 AbstractCegarLoop]: Abstraction has 2982 states and 8006 transitions. [2021-08-21 11:02:49,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:49,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 8006 transitions. [2021-08-21 11:02:49,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 11:02:49,967 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:49,967 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:49,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:50,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 11:02:50,192 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:50,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:50,192 INFO L82 PathProgramCache]: Analyzing trace with hash 871061024, now seen corresponding path program 2 times [2021-08-21 11:02:50,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:50,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506886692] [2021-08-21 11:02:50,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:50,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:50,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:50,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506886692] [2021-08-21 11:02:50,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506886692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:50,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640125570] [2021-08-21 11:02:50,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:02:50,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:50,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:50,316 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:50,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 11:02:50,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:02:50,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:50,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:02:50,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:51,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640125570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:51,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:51,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 11:02:51,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852181182] [2021-08-21 11:02:51,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 11:02:51,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:51,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 11:02:51,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:02:51,206 INFO L87 Difference]: Start difference. First operand 2982 states and 8006 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:51,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:51,386 INFO L93 Difference]: Finished difference Result 3927 states and 10274 transitions. [2021-08-21 11:02:51,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 11:02:51,386 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-21 11:02:51,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:51,391 INFO L225 Difference]: With dead ends: 3927 [2021-08-21 11:02:51,391 INFO L226 Difference]: Without dead ends: 3775 [2021-08-21 11:02:51,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 229.5ms TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:02:51,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-08-21 11:02:51,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 2981. [2021-08-21 11:02:51,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2980 states have (on average 2.684228187919463) internal successors, (7999), 2980 states have internal predecessors, (7999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:51,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 7999 transitions. [2021-08-21 11:02:51,448 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 7999 transitions. Word has length 52 [2021-08-21 11:02:51,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:51,448 INFO L470 AbstractCegarLoop]: Abstraction has 2981 states and 7999 transitions. [2021-08-21 11:02:51,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:51,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 7999 transitions. [2021-08-21 11:02:51,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 11:02:51,453 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:51,454 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:51,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:51,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 11:02:51,681 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:51,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:51,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1086922880, now seen corresponding path program 8 times [2021-08-21 11:02:51,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:51,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467254301] [2021-08-21 11:02:51,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:51,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:51,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:51,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467254301] [2021-08-21 11:02:51,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467254301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:51,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70528576] [2021-08-21 11:02:51,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:02:51,786 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:51,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:51,788 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:51,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 11:02:52,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:02:52,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:52,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:02:52,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:52,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70528576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:52,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:52,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 11:02:52,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087714851] [2021-08-21 11:02:52,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 11:02:52,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:52,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 11:02:52,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-08-21 11:02:52,642 INFO L87 Difference]: Start difference. First operand 2981 states and 7999 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:52,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:52,938 INFO L93 Difference]: Finished difference Result 4796 states and 12155 transitions. [2021-08-21 11:02:52,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 11:02:52,939 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-21 11:02:52,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:52,945 INFO L225 Difference]: With dead ends: 4796 [2021-08-21 11:02:52,945 INFO L226 Difference]: Without dead ends: 4404 [2021-08-21 11:02:52,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 268.4ms TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2021-08-21 11:02:52,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2021-08-21 11:02:52,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 2956. [2021-08-21 11:02:53,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 2.688324873096447) internal successors, (7944), 2955 states have internal predecessors, (7944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:53,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 7944 transitions. [2021-08-21 11:02:53,008 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 7944 transitions. Word has length 52 [2021-08-21 11:02:53,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:53,008 INFO L470 AbstractCegarLoop]: Abstraction has 2956 states and 7944 transitions. [2021-08-21 11:02:53,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:53,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 7944 transitions. [2021-08-21 11:02:53,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 11:02:53,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:53,016 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:53,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:53,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 11:02:53,232 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:53,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:53,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1611315092, now seen corresponding path program 9 times [2021-08-21 11:02:53,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:53,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582861778] [2021-08-21 11:02:53,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:53,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:53,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:53,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582861778] [2021-08-21 11:02:53,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582861778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:53,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744836558] [2021-08-21 11:02:53,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:02:53,339 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:53,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:53,340 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:53,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 11:02:53,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:02:53,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:53,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:02:53,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:54,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744836558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:54,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:54,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 11:02:54,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468396197] [2021-08-21 11:02:54,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 11:02:54,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:54,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 11:02:54,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-08-21 11:02:54,180 INFO L87 Difference]: Start difference. First operand 2956 states and 7944 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:54,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:54,554 INFO L93 Difference]: Finished difference Result 5543 states and 14338 transitions. [2021-08-21 11:02:54,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 11:02:54,555 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-21 11:02:54,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:54,562 INFO L225 Difference]: With dead ends: 5543 [2021-08-21 11:02:54,562 INFO L226 Difference]: Without dead ends: 5063 [2021-08-21 11:02:54,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 328.9ms TimeCoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 11:02:54,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5063 states. [2021-08-21 11:02:54,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5063 to 3250. [2021-08-21 11:02:54,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3250 states, 3249 states have (on average 2.7331486611265006) internal successors, (8880), 3249 states have internal predecessors, (8880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:54,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3250 states to 3250 states and 8880 transitions. [2021-08-21 11:02:54,633 INFO L78 Accepts]: Start accepts. Automaton has 3250 states and 8880 transitions. Word has length 52 [2021-08-21 11:02:54,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:54,633 INFO L470 AbstractCegarLoop]: Abstraction has 3250 states and 8880 transitions. [2021-08-21 11:02:54,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:54,633 INFO L276 IsEmpty]: Start isEmpty. Operand 3250 states and 8880 transitions. [2021-08-21 11:02:54,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 11:02:54,638 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:54,638 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:54,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:54,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 11:02:54,853 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:54,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:54,853 INFO L82 PathProgramCache]: Analyzing trace with hash 363828208, now seen corresponding path program 10 times [2021-08-21 11:02:54,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:54,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911194188] [2021-08-21 11:02:54,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:54,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:54,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:54,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911194188] [2021-08-21 11:02:54,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911194188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:54,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743667949] [2021-08-21 11:02:54,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:02:54,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:54,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:54,961 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:54,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 11:02:55,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:02:55,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:55,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:02:55,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:55,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743667949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:55,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:55,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 11:02:55,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516355112] [2021-08-21 11:02:55,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 11:02:55,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:55,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 11:02:55,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-08-21 11:02:55,875 INFO L87 Difference]: Start difference. First operand 3250 states and 8880 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:56,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:56,622 INFO L93 Difference]: Finished difference Result 6631 states and 17538 transitions. [2021-08-21 11:02:56,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 11:02:56,623 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-21 11:02:56,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:56,630 INFO L225 Difference]: With dead ends: 6631 [2021-08-21 11:02:56,630 INFO L226 Difference]: Without dead ends: 5691 [2021-08-21 11:02:56,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 645.1ms TimeCoverageRelationStatistics Valid=536, Invalid=1914, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 11:02:56,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5691 states. [2021-08-21 11:02:56,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5691 to 3302. [2021-08-21 11:02:56,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3302 states, 3301 states have (on average 2.7197818842774915) internal successors, (8978), 3301 states have internal predecessors, (8978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:56,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3302 states to 3302 states and 8978 transitions. [2021-08-21 11:02:56,706 INFO L78 Accepts]: Start accepts. Automaton has 3302 states and 8978 transitions. Word has length 52 [2021-08-21 11:02:56,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:56,707 INFO L470 AbstractCegarLoop]: Abstraction has 3302 states and 8978 transitions. [2021-08-21 11:02:56,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:56,707 INFO L276 IsEmpty]: Start isEmpty. Operand 3302 states and 8978 transitions. [2021-08-21 11:02:56,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 11:02:56,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:56,712 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:56,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:56,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:56,925 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:56,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:56,925 INFO L82 PathProgramCache]: Analyzing trace with hash 823094008, now seen corresponding path program 3 times [2021-08-21 11:02:56,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:56,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664991163] [2021-08-21 11:02:56,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:56,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:57,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:57,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664991163] [2021-08-21 11:02:57,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664991163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:57,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615246809] [2021-08-21 11:02:57,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:02:57,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:57,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:57,061 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:57,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 11:02:57,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:02:57,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:57,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:02:57,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:58,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615246809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:58,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:58,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 11:02:58,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048182817] [2021-08-21 11:02:58,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 11:02:58,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:58,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 11:02:58,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:02:58,082 INFO L87 Difference]: Start difference. First operand 3302 states and 8978 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:58,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:58,466 INFO L93 Difference]: Finished difference Result 5678 states and 15064 transitions. [2021-08-21 11:02:58,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 11:02:58,467 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-21 11:02:58,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:58,475 INFO L225 Difference]: With dead ends: 5678 [2021-08-21 11:02:58,475 INFO L226 Difference]: Without dead ends: 5526 [2021-08-21 11:02:58,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-08-21 11:02:58,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5526 states. [2021-08-21 11:02:58,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5526 to 3560. [2021-08-21 11:02:58,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3560 states, 3559 states have (on average 2.766226468109019) internal successors, (9845), 3559 states have internal predecessors, (9845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:58,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3560 states to 3560 states and 9845 transitions. [2021-08-21 11:02:58,541 INFO L78 Accepts]: Start accepts. Automaton has 3560 states and 9845 transitions. Word has length 52 [2021-08-21 11:02:58,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:58,542 INFO L470 AbstractCegarLoop]: Abstraction has 3560 states and 9845 transitions. [2021-08-21 11:02:58,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:58,542 INFO L276 IsEmpty]: Start isEmpty. Operand 3560 states and 9845 transitions. [2021-08-21 11:02:58,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 11:02:58,547 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:58,547 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:58,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:58,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-08-21 11:02:58,761 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:58,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:58,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1496729988, now seen corresponding path program 4 times [2021-08-21 11:02:58,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:58,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392008031] [2021-08-21 11:02:58,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:58,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:58,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:58,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392008031] [2021-08-21 11:02:58,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392008031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:58,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787972153] [2021-08-21 11:02:58,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:02:58,888 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:58,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:58,893 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:58,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 11:02:59,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:02:59,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:59,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:02:59,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:59,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:59,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787972153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:59,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:59,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 11:02:59,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75921442] [2021-08-21 11:02:59,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 11:02:59,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:59,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 11:02:59,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:02:59,820 INFO L87 Difference]: Start difference. First operand 3560 states and 9845 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:00,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:00,430 INFO L93 Difference]: Finished difference Result 6909 states and 18691 transitions. [2021-08-21 11:03:00,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 11:03:00,431 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-21 11:03:00,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:00,440 INFO L225 Difference]: With dead ends: 6909 [2021-08-21 11:03:00,440 INFO L226 Difference]: Without dead ends: 6479 [2021-08-21 11:03:00,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 549.2ms TimeCoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 11:03:00,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6479 states. [2021-08-21 11:03:00,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6479 to 3764. [2021-08-21 11:03:00,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3764 states, 3763 states have (on average 2.766941270263088) internal successors, (10412), 3763 states have internal predecessors, (10412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:00,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 10412 transitions. [2021-08-21 11:03:00,511 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 10412 transitions. Word has length 52 [2021-08-21 11:03:00,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:00,511 INFO L470 AbstractCegarLoop]: Abstraction has 3764 states and 10412 transitions. [2021-08-21 11:03:00,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:00,511 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 10412 transitions. [2021-08-21 11:03:00,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:00,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:00,517 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:00,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:00,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:00,742 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:00,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:00,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1336063101, now seen corresponding path program 11 times [2021-08-21 11:03:00,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:00,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943896189] [2021-08-21 11:03:00,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:00,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:00,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:00,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:00,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943896189] [2021-08-21 11:03:00,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943896189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:00,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361347140] [2021-08-21 11:03:00,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:03:00,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:00,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:00,889 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:00,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 11:03:01,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:03:01,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:01,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:01,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:01,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361347140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:01,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:01,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:03:01,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042839654] [2021-08-21 11:03:01,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:03:01,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:01,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:03:01,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:03:01,996 INFO L87 Difference]: Start difference. First operand 3764 states and 10412 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:02,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:02,170 INFO L93 Difference]: Finished difference Result 5044 states and 13383 transitions. [2021-08-21 11:03:02,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 11:03:02,170 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:02,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:02,179 INFO L225 Difference]: With dead ends: 5044 [2021-08-21 11:03:02,179 INFO L226 Difference]: Without dead ends: 4892 [2021-08-21 11:03:02,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 219.0ms TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2021-08-21 11:03:02,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4892 states. [2021-08-21 11:03:02,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4892 to 3839. [2021-08-21 11:03:02,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3839 states, 3838 states have (on average 2.755862428348098) internal successors, (10577), 3838 states have internal predecessors, (10577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3839 states to 3839 states and 10577 transitions. [2021-08-21 11:03:02,236 INFO L78 Accepts]: Start accepts. Automaton has 3839 states and 10577 transitions. Word has length 57 [2021-08-21 11:03:02,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:02,236 INFO L470 AbstractCegarLoop]: Abstraction has 3839 states and 10577 transitions. [2021-08-21 11:03:02,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:02,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3839 states and 10577 transitions. [2021-08-21 11:03:02,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:02,243 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:02,243 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:02,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:02,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:02,451 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:02,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:02,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1108235503, now seen corresponding path program 12 times [2021-08-21 11:03:02,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:02,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053206574] [2021-08-21 11:03:02,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:02,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:02,573 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:02,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:02,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053206574] [2021-08-21 11:03:02,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053206574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:02,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941647692] [2021-08-21 11:03:02,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:03:02,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:02,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:02,574 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:02,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 11:03:03,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:03:03,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:03,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:03,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:03,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941647692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:03,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:03,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:03:03,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976192077] [2021-08-21 11:03:03,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:03:03,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:03,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:03:03,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:03:03,709 INFO L87 Difference]: Start difference. First operand 3839 states and 10577 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:03,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:03,934 INFO L93 Difference]: Finished difference Result 5180 states and 13655 transitions. [2021-08-21 11:03:03,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 11:03:03,935 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:03,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:03,942 INFO L225 Difference]: With dead ends: 5180 [2021-08-21 11:03:03,942 INFO L226 Difference]: Without dead ends: 5028 [2021-08-21 11:03:03,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 247.5ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-08-21 11:03:03,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5028 states. [2021-08-21 11:03:04,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5028 to 3839. [2021-08-21 11:03:04,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3839 states, 3838 states have (on average 2.755862428348098) internal successors, (10577), 3838 states have internal predecessors, (10577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:04,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3839 states to 3839 states and 10577 transitions. [2021-08-21 11:03:04,044 INFO L78 Accepts]: Start accepts. Automaton has 3839 states and 10577 transitions. Word has length 57 [2021-08-21 11:03:04,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:04,045 INFO L470 AbstractCegarLoop]: Abstraction has 3839 states and 10577 transitions. [2021-08-21 11:03:04,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:04,045 INFO L276 IsEmpty]: Start isEmpty. Operand 3839 states and 10577 transitions. [2021-08-21 11:03:04,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:04,051 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:04,051 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:04,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:04,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 11:03:04,273 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:04,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:04,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1325598469, now seen corresponding path program 5 times [2021-08-21 11:03:04,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:04,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645035568] [2021-08-21 11:03:04,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:04,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:04,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:04,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645035568] [2021-08-21 11:03:04,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645035568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:04,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065824668] [2021-08-21 11:03:04,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:03:04,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:04,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:04,405 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:04,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 11:03:05,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:03:05,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:05,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:05,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:05,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065824668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:05,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:05,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:05,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673718948] [2021-08-21 11:03:05,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:05,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:05,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:05,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:05,588 INFO L87 Difference]: Start difference. First operand 3839 states and 10577 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:05,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:05,856 INFO L93 Difference]: Finished difference Result 5324 states and 13943 transitions. [2021-08-21 11:03:05,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 11:03:05,857 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:05,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:05,864 INFO L225 Difference]: With dead ends: 5324 [2021-08-21 11:03:05,864 INFO L226 Difference]: Without dead ends: 5172 [2021-08-21 11:03:05,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 283.0ms TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2021-08-21 11:03:05,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5172 states. [2021-08-21 11:03:05,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5172 to 3904. [2021-08-21 11:03:05,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3904 states, 3903 states have (on average 2.74583653599795) internal successors, (10717), 3903 states have internal predecessors, (10717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:05,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3904 states to 3904 states and 10717 transitions. [2021-08-21 11:03:05,938 INFO L78 Accepts]: Start accepts. Automaton has 3904 states and 10717 transitions. Word has length 57 [2021-08-21 11:03:05,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:05,938 INFO L470 AbstractCegarLoop]: Abstraction has 3904 states and 10717 transitions. [2021-08-21 11:03:05,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:05,938 INFO L276 IsEmpty]: Start isEmpty. Operand 3904 states and 10717 transitions. [2021-08-21 11:03:05,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:05,945 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:05,945 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:05,972 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 11:03:06,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:06,169 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:06,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:06,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1798926687, now seen corresponding path program 6 times [2021-08-21 11:03:06,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:06,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913517150] [2021-08-21 11:03:06,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:06,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:06,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:06,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913517150] [2021-08-21 11:03:06,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913517150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:06,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402068136] [2021-08-21 11:03:06,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:03:06,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:06,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:06,303 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:06,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 11:03:07,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:03:07,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:07,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:07,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:07,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402068136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:07,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:07,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:07,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538820476] [2021-08-21 11:03:07,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:07,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:07,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:07,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:07,553 INFO L87 Difference]: Start difference. First operand 3904 states and 10717 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:07,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:07,835 INFO L93 Difference]: Finished difference Result 5195 states and 13680 transitions. [2021-08-21 11:03:07,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 11:03:07,835 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:07,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:07,843 INFO L225 Difference]: With dead ends: 5195 [2021-08-21 11:03:07,843 INFO L226 Difference]: Without dead ends: 5043 [2021-08-21 11:03:07,843 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 278.4ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-08-21 11:03:07,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5043 states. [2021-08-21 11:03:07,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5043 to 3869. [2021-08-21 11:03:07,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3869 states, 3868 states have (on average 2.750775594622544) internal successors, (10640), 3868 states have internal predecessors, (10640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:07,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 10640 transitions. [2021-08-21 11:03:07,898 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 10640 transitions. Word has length 57 [2021-08-21 11:03:07,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:07,898 INFO L470 AbstractCegarLoop]: Abstraction has 3869 states and 10640 transitions. [2021-08-21 11:03:07,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:07,898 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 10640 transitions. [2021-08-21 11:03:07,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:07,903 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:07,903 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:07,921 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 11:03:08,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:08,105 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:08,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:08,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1443822703, now seen corresponding path program 7 times [2021-08-21 11:03:08,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:08,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948560231] [2021-08-21 11:03:08,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:08,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:08,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:08,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:08,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948560231] [2021-08-21 11:03:08,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948560231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:08,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975592000] [2021-08-21 11:03:08,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:03:08,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:08,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:08,233 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:08,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 11:03:09,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:09,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:09,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:09,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975592000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:09,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:09,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:09,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132501724] [2021-08-21 11:03:09,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:09,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:09,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:09,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:09,521 INFO L87 Difference]: Start difference. First operand 3869 states and 10640 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:09,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:09,883 INFO L93 Difference]: Finished difference Result 5377 states and 14042 transitions. [2021-08-21 11:03:09,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 11:03:09,883 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:09,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:09,893 INFO L225 Difference]: With dead ends: 5377 [2021-08-21 11:03:09,893 INFO L226 Difference]: Without dead ends: 5225 [2021-08-21 11:03:09,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 347.1ms TimeCoverageRelationStatistics Valid=256, Invalid=736, Unknown=0, NotChecked=0, Total=992 [2021-08-21 11:03:09,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5225 states. [2021-08-21 11:03:09,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5225 to 3974. [2021-08-21 11:03:09,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3974 states, 3973 states have (on average 2.7362194815001257) internal successors, (10871), 3973 states have internal predecessors, (10871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:09,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 10871 transitions. [2021-08-21 11:03:09,962 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 10871 transitions. Word has length 57 [2021-08-21 11:03:09,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:09,963 INFO L470 AbstractCegarLoop]: Abstraction has 3974 states and 10871 transitions. [2021-08-21 11:03:09,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:09,963 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 10871 transitions. [2021-08-21 11:03:09,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:09,969 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:09,970 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:09,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:10,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:10,184 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:10,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:10,184 INFO L82 PathProgramCache]: Analyzing trace with hash 805809545, now seen corresponding path program 8 times [2021-08-21 11:03:10,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:10,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018380848] [2021-08-21 11:03:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:10,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:10,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:10,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018380848] [2021-08-21 11:03:10,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018380848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:10,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600075034] [2021-08-21 11:03:10,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:03:10,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:10,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:10,365 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:10,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 11:03:11,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:03:11,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:11,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:11,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:11,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600075034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:11,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:11,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:11,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278767982] [2021-08-21 11:03:11,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:11,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:11,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:11,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:11,784 INFO L87 Difference]: Start difference. First operand 3974 states and 10871 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:12,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:12,134 INFO L93 Difference]: Finished difference Result 5481 states and 14250 transitions. [2021-08-21 11:03:12,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 11:03:12,134 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:12,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:12,162 INFO L225 Difference]: With dead ends: 5481 [2021-08-21 11:03:12,162 INFO L226 Difference]: Without dead ends: 5329 [2021-08-21 11:03:12,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=294, Invalid=828, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 11:03:12,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5329 states. [2021-08-21 11:03:12,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5329 to 3943. [2021-08-21 11:03:12,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3943 states, 3942 states have (on average 2.73921867072552) internal successors, (10798), 3942 states have internal predecessors, (10798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:12,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3943 states to 3943 states and 10798 transitions. [2021-08-21 11:03:12,213 INFO L78 Accepts]: Start accepts. Automaton has 3943 states and 10798 transitions. Word has length 57 [2021-08-21 11:03:12,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:12,213 INFO L470 AbstractCegarLoop]: Abstraction has 3943 states and 10798 transitions. [2021-08-21 11:03:12,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:12,213 INFO L276 IsEmpty]: Start isEmpty. Operand 3943 states and 10798 transitions. [2021-08-21 11:03:12,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:12,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:12,218 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:12,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:12,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 11:03:12,420 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:12,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:12,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1819523197, now seen corresponding path program 9 times [2021-08-21 11:03:12,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:12,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755392117] [2021-08-21 11:03:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:12,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:12,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:12,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:12,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755392117] [2021-08-21 11:03:12,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755392117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:12,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388616596] [2021-08-21 11:03:12,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:03:12,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:12,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:12,553 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:12,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 11:03:13,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:03:13,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:13,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:13,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:13,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388616596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:13,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:13,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:13,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094675988] [2021-08-21 11:03:13,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:13,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:13,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:13,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:13,984 INFO L87 Difference]: Start difference. First operand 3943 states and 10798 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:14,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:14,340 INFO L93 Difference]: Finished difference Result 5465 states and 14218 transitions. [2021-08-21 11:03:14,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 11:03:14,340 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:14,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:14,347 INFO L225 Difference]: With dead ends: 5465 [2021-08-21 11:03:14,347 INFO L226 Difference]: Without dead ends: 5313 [2021-08-21 11:03:14,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 370.3ms TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 11:03:14,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5313 states. [2021-08-21 11:03:14,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5313 to 3903. [2021-08-21 11:03:14,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 2.744746283956945) internal successors, (10710), 3902 states have internal predecessors, (10710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:14,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 10710 transitions. [2021-08-21 11:03:14,395 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 10710 transitions. Word has length 57 [2021-08-21 11:03:14,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:14,395 INFO L470 AbstractCegarLoop]: Abstraction has 3903 states and 10710 transitions. [2021-08-21 11:03:14,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:14,395 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 10710 transitions. [2021-08-21 11:03:14,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:14,399 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:14,399 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:14,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-21 11:03:14,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 11:03:14,600 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:14,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:14,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1924399503, now seen corresponding path program 13 times [2021-08-21 11:03:14,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:14,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238583394] [2021-08-21 11:03:14,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:14,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:14,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:14,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238583394] [2021-08-21 11:03:14,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238583394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:14,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183713577] [2021-08-21 11:03:14,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:03:14,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:14,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:14,731 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:14,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 11:03:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:15,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:15,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:16,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183713577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:16,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:16,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:03:16,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291584926] [2021-08-21 11:03:16,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:03:16,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:16,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:03:16,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:03:16,091 INFO L87 Difference]: Start difference. First operand 3903 states and 10710 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:16,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:16,267 INFO L93 Difference]: Finished difference Result 5284 states and 13871 transitions. [2021-08-21 11:03:16,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 11:03:16,267 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:16,274 INFO L225 Difference]: With dead ends: 5284 [2021-08-21 11:03:16,274 INFO L226 Difference]: Without dead ends: 5132 [2021-08-21 11:03:16,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 209.0ms TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-08-21 11:03:16,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2021-08-21 11:03:16,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 3953. [2021-08-21 11:03:16,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 2.7378542510121457) internal successors, (10820), 3952 states have internal predecessors, (10820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:16,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 10820 transitions. [2021-08-21 11:03:16,326 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 10820 transitions. Word has length 57 [2021-08-21 11:03:16,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:16,326 INFO L470 AbstractCegarLoop]: Abstraction has 3953 states and 10820 transitions. [2021-08-21 11:03:16,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:16,326 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 10820 transitions. [2021-08-21 11:03:16,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:16,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:16,331 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:16,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-21 11:03:16,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 11:03:16,531 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:16,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:16,532 INFO L82 PathProgramCache]: Analyzing trace with hash -519899101, now seen corresponding path program 14 times [2021-08-21 11:03:16,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:16,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139764142] [2021-08-21 11:03:16,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:16,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:16,643 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:16,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:16,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139764142] [2021-08-21 11:03:16,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139764142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:16,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364610244] [2021-08-21 11:03:16,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:03:16,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:16,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:16,644 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:16,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 11:03:17,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:03:17,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:17,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:17,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:18,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364610244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:18,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:18,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:03:18,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188922757] [2021-08-21 11:03:18,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:03:18,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:18,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:03:18,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:03:18,098 INFO L87 Difference]: Start difference. First operand 3953 states and 10820 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:18,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:18,337 INFO L93 Difference]: Finished difference Result 5525 states and 14358 transitions. [2021-08-21 11:03:18,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 11:03:18,337 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:18,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:18,345 INFO L225 Difference]: With dead ends: 5525 [2021-08-21 11:03:18,345 INFO L226 Difference]: Without dead ends: 5373 [2021-08-21 11:03:18,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 253.3ms TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2021-08-21 11:03:18,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5373 states. [2021-08-21 11:03:18,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5373 to 3953. [2021-08-21 11:03:18,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 2.7378542510121457) internal successors, (10820), 3952 states have internal predecessors, (10820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:18,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 10820 transitions. [2021-08-21 11:03:18,399 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 10820 transitions. Word has length 57 [2021-08-21 11:03:18,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:18,400 INFO L470 AbstractCegarLoop]: Abstraction has 3953 states and 10820 transitions. [2021-08-21 11:03:18,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:18,400 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 10820 transitions. [2021-08-21 11:03:18,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:18,405 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:18,405 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:18,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:18,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:18,606 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:18,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:18,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1913934871, now seen corresponding path program 10 times [2021-08-21 11:03:18,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:18,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932754818] [2021-08-21 11:03:18,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:18,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:18,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:18,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932754818] [2021-08-21 11:03:18,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932754818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:18,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449259787] [2021-08-21 11:03:18,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:03:18,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:18,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:18,721 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:18,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 11:03:19,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:03:19,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:19,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:19,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:20,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449259787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:20,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:20,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:20,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813002897] [2021-08-21 11:03:20,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:20,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:20,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:20,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:20,201 INFO L87 Difference]: Start difference. First operand 3953 states and 10820 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:20,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:20,520 INFO L93 Difference]: Finished difference Result 5660 states and 14623 transitions. [2021-08-21 11:03:20,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 11:03:20,520 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:20,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:20,528 INFO L225 Difference]: With dead ends: 5660 [2021-08-21 11:03:20,528 INFO L226 Difference]: Without dead ends: 5508 [2021-08-21 11:03:20,528 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 330.7ms TimeCoverageRelationStatistics Valid=279, Invalid=777, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 11:03:20,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5508 states. [2021-08-21 11:03:20,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5508 to 3953. [2021-08-21 11:03:20,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 2.7378542510121457) internal successors, (10820), 3952 states have internal predecessors, (10820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:20,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 10820 transitions. [2021-08-21 11:03:20,579 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 10820 transitions. Word has length 57 [2021-08-21 11:03:20,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:20,579 INFO L470 AbstractCegarLoop]: Abstraction has 3953 states and 10820 transitions. [2021-08-21 11:03:20,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:20,580 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 10820 transitions. [2021-08-21 11:03:20,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:20,585 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:20,585 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:20,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:20,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:20,794 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:20,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:20,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1907704207, now seen corresponding path program 11 times [2021-08-21 11:03:20,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:20,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422732990] [2021-08-21 11:03:20,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:20,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:20,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:20,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422732990] [2021-08-21 11:03:20,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422732990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:20,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66427394] [2021-08-21 11:03:20,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:03:20,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:20,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:20,916 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:20,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 11:03:21,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:03:21,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:21,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:21,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:22,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66427394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:22,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:22,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:22,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133768106] [2021-08-21 11:03:22,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:22,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:22,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:22,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:22,454 INFO L87 Difference]: Start difference. First operand 3953 states and 10820 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:22,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:22,803 INFO L93 Difference]: Finished difference Result 5465 states and 14218 transitions. [2021-08-21 11:03:22,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 11:03:22,803 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:22,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:22,810 INFO L225 Difference]: With dead ends: 5465 [2021-08-21 11:03:22,810 INFO L226 Difference]: Without dead ends: 5313 [2021-08-21 11:03:22,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 348.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-21 11:03:22,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5313 states. [2021-08-21 11:03:22,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5313 to 3878. [2021-08-21 11:03:22,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.7482589631158114) internal successors, (10655), 3877 states have internal predecessors, (10655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:22,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10655 transitions. [2021-08-21 11:03:22,855 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10655 transitions. Word has length 57 [2021-08-21 11:03:22,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:22,855 INFO L470 AbstractCegarLoop]: Abstraction has 3878 states and 10655 transitions. [2021-08-21 11:03:22,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:22,855 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10655 transitions. [2021-08-21 11:03:22,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:22,859 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:22,859 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:22,877 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 11:03:23,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-21 11:03:23,061 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:23,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:23,061 INFO L82 PathProgramCache]: Analyzing trace with hash 462098783, now seen corresponding path program 15 times [2021-08-21 11:03:23,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:23,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650417810] [2021-08-21 11:03:23,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:23,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:23,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:23,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650417810] [2021-08-21 11:03:23,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650417810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:23,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958859330] [2021-08-21 11:03:23,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:03:23,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:23,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:23,190 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:23,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 11:03:24,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:03:24,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:24,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:24,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:24,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958859330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:24,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:24,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:03:24,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560378488] [2021-08-21 11:03:24,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:03:24,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:24,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:03:24,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:03:24,715 INFO L87 Difference]: Start difference. First operand 3878 states and 10655 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:24,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:24,901 INFO L93 Difference]: Finished difference Result 5289 states and 13896 transitions. [2021-08-21 11:03:24,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 11:03:24,901 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:24,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:24,908 INFO L225 Difference]: With dead ends: 5289 [2021-08-21 11:03:24,908 INFO L226 Difference]: Without dead ends: 5137 [2021-08-21 11:03:24,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-08-21 11:03:24,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5137 states. [2021-08-21 11:03:24,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5137 to 3903. [2021-08-21 11:03:24,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 2.744746283956945) internal successors, (10710), 3902 states have internal predecessors, (10710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:24,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 10710 transitions. [2021-08-21 11:03:24,962 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 10710 transitions. Word has length 57 [2021-08-21 11:03:24,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:24,962 INFO L470 AbstractCegarLoop]: Abstraction has 3903 states and 10710 transitions. [2021-08-21 11:03:24,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:24,963 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 10710 transitions. [2021-08-21 11:03:24,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:24,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:24,968 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:24,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:25,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-21 11:03:25,183 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:25,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:25,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1982199821, now seen corresponding path program 16 times [2021-08-21 11:03:25,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:25,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522599954] [2021-08-21 11:03:25,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:25,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:25,296 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 11:03:25,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:25,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522599954] [2021-08-21 11:03:25,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522599954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:25,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045675593] [2021-08-21 11:03:25,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:03:25,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:25,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:25,298 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:25,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 11:03:26,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:03:26,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:26,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:26,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:26,878 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:26,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045675593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:26,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:26,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:03:26,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377980097] [2021-08-21 11:03:26,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:03:26,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:26,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:03:26,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:03:26,879 INFO L87 Difference]: Start difference. First operand 3903 states and 10710 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:27,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:27,130 INFO L93 Difference]: Finished difference Result 5505 states and 14328 transitions. [2021-08-21 11:03:27,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 11:03:27,131 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:27,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:27,137 INFO L225 Difference]: With dead ends: 5505 [2021-08-21 11:03:27,138 INFO L226 Difference]: Without dead ends: 5353 [2021-08-21 11:03:27,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 256.3ms TimeCoverageRelationStatistics Valid=218, Invalid=594, Unknown=0, NotChecked=0, Total=812 [2021-08-21 11:03:27,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5353 states. [2021-08-21 11:03:27,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5353 to 3903. [2021-08-21 11:03:27,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 2.744746283956945) internal successors, (10710), 3902 states have internal predecessors, (10710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:27,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 10710 transitions. [2021-08-21 11:03:27,185 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 10710 transitions. Word has length 57 [2021-08-21 11:03:27,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:27,185 INFO L470 AbstractCegarLoop]: Abstraction has 3903 states and 10710 transitions. [2021-08-21 11:03:27,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:27,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 10710 transitions. [2021-08-21 11:03:27,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:27,189 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:27,189 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:27,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:27,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:27,389 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:27,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:27,390 INFO L82 PathProgramCache]: Analyzing trace with hash 31285135, now seen corresponding path program 17 times [2021-08-21 11:03:27,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:27,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272961395] [2021-08-21 11:03:27,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:27,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:27,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:27,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272961395] [2021-08-21 11:03:27,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272961395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:27,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055231608] [2021-08-21 11:03:27,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:03:27,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:27,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:27,505 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:27,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 11:03:28,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:03:28,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:28,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:28,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:29,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055231608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:29,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:29,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:03:29,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684384806] [2021-08-21 11:03:29,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:03:29,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:29,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:03:29,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:03:29,162 INFO L87 Difference]: Start difference. First operand 3903 states and 10710 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:29,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:29,361 INFO L93 Difference]: Finished difference Result 5274 states and 13871 transitions. [2021-08-21 11:03:29,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 11:03:29,362 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:29,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:29,369 INFO L225 Difference]: With dead ends: 5274 [2021-08-21 11:03:29,369 INFO L226 Difference]: Without dead ends: 5122 [2021-08-21 11:03:29,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 226.2ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-08-21 11:03:29,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5122 states. [2021-08-21 11:03:29,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5122 to 3878. [2021-08-21 11:03:29,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.7482589631158114) internal successors, (10655), 3877 states have internal predecessors, (10655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:29,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10655 transitions. [2021-08-21 11:03:29,423 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10655 transitions. Word has length 57 [2021-08-21 11:03:29,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:29,423 INFO L470 AbstractCegarLoop]: Abstraction has 3878 states and 10655 transitions. [2021-08-21 11:03:29,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:29,423 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10655 transitions. [2021-08-21 11:03:29,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:29,427 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:29,427 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:29,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-21 11:03:29,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:29,627 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:29,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:29,628 INFO L82 PathProgramCache]: Analyzing trace with hash -2067603337, now seen corresponding path program 18 times [2021-08-21 11:03:29,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:29,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937529461] [2021-08-21 11:03:29,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:29,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:29,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:29,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937529461] [2021-08-21 11:03:29,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937529461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:29,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683156470] [2021-08-21 11:03:29,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:03:29,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:29,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:29,763 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:29,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 11:03:31,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:03:31,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:31,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:31,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:31,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683156470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:31,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:31,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:03:31,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887320074] [2021-08-21 11:03:31,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:03:31,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:31,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:03:31,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:03:31,515 INFO L87 Difference]: Start difference. First operand 3878 states and 10655 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:31,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:31,962 INFO L93 Difference]: Finished difference Result 6869 states and 18363 transitions. [2021-08-21 11:03:31,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 11:03:31,963 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:31,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:31,971 INFO L225 Difference]: With dead ends: 6869 [2021-08-21 11:03:31,972 INFO L226 Difference]: Without dead ends: 6487 [2021-08-21 11:03:31,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 463.0ms TimeCoverageRelationStatistics Valid=369, Invalid=1037, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 11:03:31,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6487 states. [2021-08-21 11:03:32,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6487 to 3851. [2021-08-21 11:03:32,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3851 states, 3850 states have (on average 2.7511688311688314) internal successors, (10592), 3850 states have internal predecessors, (10592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:32,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3851 states to 3851 states and 10592 transitions. [2021-08-21 11:03:32,026 INFO L78 Accepts]: Start accepts. Automaton has 3851 states and 10592 transitions. Word has length 57 [2021-08-21 11:03:32,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:32,026 INFO L470 AbstractCegarLoop]: Abstraction has 3851 states and 10592 transitions. [2021-08-21 11:03:32,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:32,026 INFO L276 IsEmpty]: Start isEmpty. Operand 3851 states and 10592 transitions. [2021-08-21 11:03:32,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:32,030 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:32,030 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:32,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-21 11:03:32,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:32,230 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:32,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:32,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1788375263, now seen corresponding path program 19 times [2021-08-21 11:03:32,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:32,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303066618] [2021-08-21 11:03:32,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:32,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:32,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:32,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303066618] [2021-08-21 11:03:32,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303066618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:32,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062620384] [2021-08-21 11:03:32,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:03:32,339 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:32,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:32,340 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:32,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 11:03:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:33,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:33,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:34,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062620384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:34,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:34,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:03:34,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589946645] [2021-08-21 11:03:34,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:03:34,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:34,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:03:34,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:03:34,030 INFO L87 Difference]: Start difference. First operand 3851 states and 10592 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:34,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:34,370 INFO L93 Difference]: Finished difference Result 6208 states and 16499 transitions. [2021-08-21 11:03:34,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 11:03:34,370 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:34,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:34,378 INFO L225 Difference]: With dead ends: 6208 [2021-08-21 11:03:34,378 INFO L226 Difference]: Without dead ends: 6056 [2021-08-21 11:03:34,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 341.7ms TimeCoverageRelationStatistics Valid=297, Invalid=825, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 11:03:34,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6056 states. [2021-08-21 11:03:34,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6056 to 4166. [2021-08-21 11:03:34,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4166 states, 4165 states have (on average 2.7843937575030013) internal successors, (11597), 4165 states have internal predecessors, (11597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:34,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4166 states to 4166 states and 11597 transitions. [2021-08-21 11:03:34,447 INFO L78 Accepts]: Start accepts. Automaton has 4166 states and 11597 transitions. Word has length 57 [2021-08-21 11:03:34,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:34,447 INFO L470 AbstractCegarLoop]: Abstraction has 4166 states and 11597 transitions. [2021-08-21 11:03:34,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:34,447 INFO L276 IsEmpty]: Start isEmpty. Operand 4166 states and 11597 transitions. [2021-08-21 11:03:34,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:34,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:34,451 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:34,470 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 11:03:34,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 11:03:34,652 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:34,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:34,653 INFO L82 PathProgramCache]: Analyzing trace with hash -531448733, now seen corresponding path program 20 times [2021-08-21 11:03:34,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:34,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032183167] [2021-08-21 11:03:34,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:34,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:34,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:34,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032183167] [2021-08-21 11:03:34,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032183167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:34,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879660168] [2021-08-21 11:03:34,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:03:34,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:34,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:34,766 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:34,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 11:03:36,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:03:36,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:36,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:36,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:36,567 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:36,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879660168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:36,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:36,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:03:36,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236090740] [2021-08-21 11:03:36,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:03:36,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:36,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:03:36,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:03:36,568 INFO L87 Difference]: Start difference. First operand 4166 states and 11597 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:37,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:37,171 INFO L93 Difference]: Finished difference Result 7842 states and 21090 transitions. [2021-08-21 11:03:37,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 11:03:37,171 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:37,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:37,184 INFO L225 Difference]: With dead ends: 7842 [2021-08-21 11:03:37,184 INFO L226 Difference]: Without dead ends: 7281 [2021-08-21 11:03:37,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 553.6ms TimeCoverageRelationStatistics Valid=503, Invalid=1567, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 11:03:37,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7281 states. [2021-08-21 11:03:37,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7281 to 3806. [2021-08-21 11:03:37,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3806 states, 3805 states have (on average 2.7821287779237847) internal successors, (10586), 3805 states have internal predecessors, (10586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:37,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3806 states to 3806 states and 10586 transitions. [2021-08-21 11:03:37,246 INFO L78 Accepts]: Start accepts. Automaton has 3806 states and 10586 transitions. Word has length 57 [2021-08-21 11:03:37,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:37,246 INFO L470 AbstractCegarLoop]: Abstraction has 3806 states and 10586 transitions. [2021-08-21 11:03:37,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:37,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3806 states and 10586 transitions. [2021-08-21 11:03:37,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:37,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:37,249 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:37,271 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 11:03:37,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 11:03:37,450 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:37,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:37,451 INFO L82 PathProgramCache]: Analyzing trace with hash -72182933, now seen corresponding path program 12 times [2021-08-21 11:03:37,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:37,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17915791] [2021-08-21 11:03:37,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:37,451 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:37,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:37,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17915791] [2021-08-21 11:03:37,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17915791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:37,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842928432] [2021-08-21 11:03:37,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:03:37,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:37,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:37,581 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:37,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 11:03:38,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 11:03:38,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:38,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:38,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:39,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842928432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:39,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:39,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:39,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906191878] [2021-08-21 11:03:39,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:39,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:39,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:39,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:39,367 INFO L87 Difference]: Start difference. First operand 3806 states and 10586 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:39,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:39,814 INFO L93 Difference]: Finished difference Result 6434 states and 17119 transitions. [2021-08-21 11:03:39,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 11:03:39,814 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:39,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:39,826 INFO L225 Difference]: With dead ends: 6434 [2021-08-21 11:03:39,826 INFO L226 Difference]: Without dead ends: 6282 [2021-08-21 11:03:39,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 404.5ms TimeCoverageRelationStatistics Valid=360, Invalid=1122, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 11:03:39,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6282 states. [2021-08-21 11:03:39,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6282 to 4016. [2021-08-21 11:03:39,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4016 states, 4015 states have (on average 2.8084682440846827) internal successors, (11276), 4015 states have internal predecessors, (11276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:39,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4016 states to 4016 states and 11276 transitions. [2021-08-21 11:03:39,908 INFO L78 Accepts]: Start accepts. Automaton has 4016 states and 11276 transitions. Word has length 57 [2021-08-21 11:03:39,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:39,908 INFO L470 AbstractCegarLoop]: Abstraction has 4016 states and 11276 transitions. [2021-08-21 11:03:39,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:39,908 INFO L276 IsEmpty]: Start isEmpty. Operand 4016 states and 11276 transitions. [2021-08-21 11:03:39,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:39,914 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:39,914 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:39,955 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 11:03:40,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 11:03:40,129 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:40,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:40,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1902960367, now seen corresponding path program 13 times [2021-08-21 11:03:40,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:40,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144266383] [2021-08-21 11:03:40,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:40,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:40,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:40,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:40,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144266383] [2021-08-21 11:03:40,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144266383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:40,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833010227] [2021-08-21 11:03:40,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:03:40,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:40,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:40,235 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:40,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 11:03:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:41,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:41,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:42,005 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:42,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833010227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:42,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:42,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:03:42,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064511288] [2021-08-21 11:03:42,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:03:42,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:42,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:03:42,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:03:42,007 INFO L87 Difference]: Start difference. First operand 4016 states and 11276 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:42,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:42,655 INFO L93 Difference]: Finished difference Result 7869 states and 21283 transitions. [2021-08-21 11:03:42,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 11:03:42,655 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:42,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:42,669 INFO L225 Difference]: With dead ends: 7869 [2021-08-21 11:03:42,669 INFO L226 Difference]: Without dead ends: 7487 [2021-08-21 11:03:42,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 574.0ms TimeCoverageRelationStatistics Valid=583, Invalid=1867, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 11:03:42,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7487 states. [2021-08-21 11:03:42,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7487 to 3716. [2021-08-21 11:03:42,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 2.7736204576043066) internal successors, (10304), 3715 states have internal predecessors, (10304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:42,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 10304 transitions. [2021-08-21 11:03:42,732 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 10304 transitions. Word has length 57 [2021-08-21 11:03:42,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:42,732 INFO L470 AbstractCegarLoop]: Abstraction has 3716 states and 10304 transitions. [2021-08-21 11:03:42,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:42,733 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 10304 transitions. [2021-08-21 11:03:42,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:42,736 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:42,736 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:42,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-21 11:03:42,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 11:03:42,937 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:42,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:42,937 INFO L82 PathProgramCache]: Analyzing trace with hash -24893345, now seen corresponding path program 14 times [2021-08-21 11:03:42,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:42,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489935207] [2021-08-21 11:03:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:42,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:43,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:43,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:43,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489935207] [2021-08-21 11:03:43,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489935207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:43,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447945129] [2021-08-21 11:03:43,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:03:43,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:43,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:43,061 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:43,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 11:03:44,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:03:44,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:44,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:44,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:44,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447945129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:44,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:44,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:44,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881573691] [2021-08-21 11:03:44,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:44,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:44,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:44,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:44,998 INFO L87 Difference]: Start difference. First operand 3716 states and 10304 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:45,509 INFO L93 Difference]: Finished difference Result 6934 states and 18559 transitions. [2021-08-21 11:03:45,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 11:03:45,510 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:45,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:45,520 INFO L225 Difference]: With dead ends: 6934 [2021-08-21 11:03:45,520 INFO L226 Difference]: Without dead ends: 6782 [2021-08-21 11:03:45,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 478.2ms TimeCoverageRelationStatistics Valid=410, Invalid=1312, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 11:03:45,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6782 states. [2021-08-21 11:03:45,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6782 to 4181. [2021-08-21 11:03:45,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4181 states, 4180 states have (on average 2.8117224880382774) internal successors, (11753), 4180 states have internal predecessors, (11753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:45,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4181 states to 4181 states and 11753 transitions. [2021-08-21 11:03:45,579 INFO L78 Accepts]: Start accepts. Automaton has 4181 states and 11753 transitions. Word has length 57 [2021-08-21 11:03:45,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:45,579 INFO L470 AbstractCegarLoop]: Abstraction has 4181 states and 11753 transitions. [2021-08-21 11:03:45,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:45,579 INFO L276 IsEmpty]: Start isEmpty. Operand 4181 states and 11753 transitions. [2021-08-21 11:03:45,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:45,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:45,583 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:45,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:45,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:45,795 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:45,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:45,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1950249955, now seen corresponding path program 15 times [2021-08-21 11:03:45,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:45,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939073293] [2021-08-21 11:03:45,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:45,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:45,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:45,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939073293] [2021-08-21 11:03:45,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939073293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:45,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769795848] [2021-08-21 11:03:45,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:03:45,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:45,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:45,903 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:45,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 11:03:47,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:03:47,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:47,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:47,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:47,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769795848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:47,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:47,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:03:47,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345765406] [2021-08-21 11:03:47,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:03:47,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:47,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:03:47,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:03:47,789 INFO L87 Difference]: Start difference. First operand 4181 states and 11753 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:48,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:48,567 INFO L93 Difference]: Finished difference Result 8650 states and 23583 transitions. [2021-08-21 11:03:48,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 11:03:48,568 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:48,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:48,584 INFO L225 Difference]: With dead ends: 8650 [2021-08-21 11:03:48,584 INFO L226 Difference]: Without dead ends: 8220 [2021-08-21 11:03:48,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 704.8ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 11:03:48,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8220 states. [2021-08-21 11:03:48,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8220 to 4208. [2021-08-21 11:03:48,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4208 states, 4207 states have (on average 2.7943903018778227) internal successors, (11756), 4207 states have internal predecessors, (11756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:48,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4208 states to 4208 states and 11756 transitions. [2021-08-21 11:03:48,650 INFO L78 Accepts]: Start accepts. Automaton has 4208 states and 11756 transitions. Word has length 57 [2021-08-21 11:03:48,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:48,650 INFO L470 AbstractCegarLoop]: Abstraction has 4208 states and 11756 transitions. [2021-08-21 11:03:48,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:48,651 INFO L276 IsEmpty]: Start isEmpty. Operand 4208 states and 11756 transitions. [2021-08-21 11:03:48,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:48,655 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:48,655 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:48,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-21 11:03:48,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 11:03:48,855 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:48,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:48,856 INFO L82 PathProgramCache]: Analyzing trace with hash -340337257, now seen corresponding path program 16 times [2021-08-21 11:03:48,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:48,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900455187] [2021-08-21 11:03:48,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:48,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:48,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:48,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:48,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900455187] [2021-08-21 11:03:48,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900455187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:48,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135903180] [2021-08-21 11:03:48,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:03:48,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:48,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:48,980 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:48,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 11:03:50,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:03:50,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:50,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:50,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:50,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135903180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:50,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:50,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:50,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10266012] [2021-08-21 11:03:50,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:50,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:50,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:50,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:50,924 INFO L87 Difference]: Start difference. First operand 4208 states and 11756 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:51,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:51,498 INFO L93 Difference]: Finished difference Result 6811 states and 17802 transitions. [2021-08-21 11:03:51,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 11:03:51,499 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:51,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:51,512 INFO L225 Difference]: With dead ends: 6811 [2021-08-21 11:03:51,512 INFO L226 Difference]: Without dead ends: 6659 [2021-08-21 11:03:51,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 502.0ms TimeCoverageRelationStatistics Valid=396, Invalid=1326, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 11:03:51,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6659 states. [2021-08-21 11:03:51,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6659 to 4411. [2021-08-21 11:03:51,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4411 states, 4410 states have (on average 2.7988662131519275) internal successors, (12343), 4410 states have internal predecessors, (12343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:51,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4411 states to 4411 states and 12343 transitions. [2021-08-21 11:03:51,597 INFO L78 Accepts]: Start accepts. Automaton has 4411 states and 12343 transitions. Word has length 57 [2021-08-21 11:03:51,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:51,599 INFO L470 AbstractCegarLoop]: Abstraction has 4411 states and 12343 transitions. [2021-08-21 11:03:51,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:51,599 INFO L276 IsEmpty]: Start isEmpty. Operand 4411 states and 12343 transitions. [2021-08-21 11:03:51,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:51,605 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:51,606 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:51,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:51,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:51,821 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:51,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:51,821 INFO L82 PathProgramCache]: Analyzing trace with hash 994229607, now seen corresponding path program 17 times [2021-08-21 11:03:51,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:51,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576125945] [2021-08-21 11:03:51,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:51,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:51,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:51,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576125945] [2021-08-21 11:03:51,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576125945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:51,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414121593] [2021-08-21 11:03:51,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:03:51,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:51,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:51,981 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:52,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 11:03:53,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:03:53,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:53,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:53,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:53,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414121593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:53,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:53,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:53,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512204586] [2021-08-21 11:03:53,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:53,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:53,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:53,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:53,993 INFO L87 Difference]: Start difference. First operand 4411 states and 12343 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:54,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:54,611 INFO L93 Difference]: Finished difference Result 7224 states and 19528 transitions. [2021-08-21 11:03:54,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 11:03:54,612 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:54,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:54,628 INFO L225 Difference]: With dead ends: 7224 [2021-08-21 11:03:54,628 INFO L226 Difference]: Without dead ends: 7072 [2021-08-21 11:03:54,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 568.2ms TimeCoverageRelationStatistics Valid=532, Invalid=1724, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 11:03:54,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7072 states. [2021-08-21 11:03:54,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7072 to 4606. [2021-08-21 11:03:54,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4606 states, 4605 states have (on average 2.817155266015201) internal successors, (12973), 4605 states have internal predecessors, (12973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:54,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4606 states to 4606 states and 12973 transitions. [2021-08-21 11:03:54,723 INFO L78 Accepts]: Start accepts. Automaton has 4606 states and 12973 transitions. Word has length 57 [2021-08-21 11:03:54,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:54,723 INFO L470 AbstractCegarLoop]: Abstraction has 4606 states and 12973 transitions. [2021-08-21 11:03:54,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:54,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4606 states and 12973 transitions. [2021-08-21 11:03:54,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:54,729 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:54,730 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:54,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:54,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:54,945 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:54,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:54,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1325594389, now seen corresponding path program 18 times [2021-08-21 11:03:54,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:54,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715515389] [2021-08-21 11:03:54,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:54,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:54,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:55,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:55,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:55,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715515389] [2021-08-21 11:03:55,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715515389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:55,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339318165] [2021-08-21 11:03:55,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:03:55,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:55,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:55,063 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:55,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 11:03:56,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 11:03:56,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:56,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:56,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:57,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339318165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:57,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:57,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:03:57,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789759119] [2021-08-21 11:03:57,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:03:57,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:57,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:03:57,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:03:57,051 INFO L87 Difference]: Start difference. First operand 4606 states and 12973 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:57,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:57,880 INFO L93 Difference]: Finished difference Result 8526 states and 23409 transitions. [2021-08-21 11:03:57,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 11:03:57,880 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:03:57,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:57,892 INFO L225 Difference]: With dead ends: 8526 [2021-08-21 11:03:57,892 INFO L226 Difference]: Without dead ends: 8144 [2021-08-21 11:03:57,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 781.6ms TimeCoverageRelationStatistics Valid=771, Invalid=2535, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 11:03:57,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8144 states. [2021-08-21 11:03:57,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8144 to 4198. [2021-08-21 11:03:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4198 states, 4197 states have (on average 2.7850845842268286) internal successors, (11689), 4197 states have internal predecessors, (11689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:57,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 11689 transitions. [2021-08-21 11:03:57,958 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 11689 transitions. Word has length 57 [2021-08-21 11:03:57,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:57,958 INFO L470 AbstractCegarLoop]: Abstraction has 4198 states and 11689 transitions. [2021-08-21 11:03:57,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:57,958 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 11689 transitions. [2021-08-21 11:03:57,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:57,962 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:57,962 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:57,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:58,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-21 11:03:58,163 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:58,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:58,163 INFO L82 PathProgramCache]: Analyzing trace with hash -637563609, now seen corresponding path program 19 times [2021-08-21 11:03:58,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:58,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836309401] [2021-08-21 11:03:58,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:58,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:58,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:58,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:58,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836309401] [2021-08-21 11:03:58,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836309401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:58,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181944630] [2021-08-21 11:03:58,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:03:58,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:58,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:58,272 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:58,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 11:03:59,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:59,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:59,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:00,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:00,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181944630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:00,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:00,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:04:00,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048680655] [2021-08-21 11:04:00,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:04:00,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:00,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:04:00,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:04:00,368 INFO L87 Difference]: Start difference. First operand 4198 states and 11689 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:00,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:00,876 INFO L93 Difference]: Finished difference Result 6757 states and 17446 transitions. [2021-08-21 11:04:00,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 11:04:00,877 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:04:00,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:00,886 INFO L225 Difference]: With dead ends: 6757 [2021-08-21 11:04:00,886 INFO L226 Difference]: Without dead ends: 6605 [2021-08-21 11:04:00,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 490.3ms TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 11:04:00,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6605 states. [2021-08-21 11:04:00,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6605 to 4133. [2021-08-21 11:04:00,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4133 states, 4132 states have (on average 2.7942884801548886) internal successors, (11546), 4132 states have internal predecessors, (11546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:00,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4133 states to 4133 states and 11546 transitions. [2021-08-21 11:04:00,944 INFO L78 Accepts]: Start accepts. Automaton has 4133 states and 11546 transitions. Word has length 57 [2021-08-21 11:04:00,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:00,944 INFO L470 AbstractCegarLoop]: Abstraction has 4133 states and 11546 transitions. [2021-08-21 11:04:00,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:00,944 INFO L276 IsEmpty]: Start isEmpty. Operand 4133 states and 11546 transitions. [2021-08-21 11:04:00,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:04:00,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:00,949 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:04:00,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 11:04:01,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 11:04:01,163 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:01,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:01,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1213293229, now seen corresponding path program 20 times [2021-08-21 11:04:01,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:01,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236378281] [2021-08-21 11:04:01,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:01,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:01,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:01,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236378281] [2021-08-21 11:04:01,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236378281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:01,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429056533] [2021-08-21 11:04:01,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:04:01,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:01,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:01,278 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:04:01,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 11:04:03,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:04:03,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:03,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:04:03,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:03,470 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:03,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429056533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:03,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:03,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:04:03,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449014279] [2021-08-21 11:04:03,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:04:03,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:03,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:04:03,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:04:03,472 INFO L87 Difference]: Start difference. First operand 4133 states and 11546 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:04,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:04,301 INFO L93 Difference]: Finished difference Result 7362 states and 19861 transitions. [2021-08-21 11:04:04,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 11:04:04,302 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:04:04,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:04,312 INFO L225 Difference]: With dead ends: 7362 [2021-08-21 11:04:04,312 INFO L226 Difference]: Without dead ends: 7210 [2021-08-21 11:04:04,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 747.5ms TimeCoverageRelationStatistics Valid=498, Invalid=1572, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 11:04:04,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7210 states. [2021-08-21 11:04:04,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7210 to 4238. [2021-08-21 11:04:04,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4238 states, 4237 states have (on average 2.8064668397451027) internal successors, (11891), 4237 states have internal predecessors, (11891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:04,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4238 states to 4238 states and 11891 transitions. [2021-08-21 11:04:04,374 INFO L78 Accepts]: Start accepts. Automaton has 4238 states and 11891 transitions. Word has length 57 [2021-08-21 11:04:04,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:04,374 INFO L470 AbstractCegarLoop]: Abstraction has 4238 states and 11891 transitions. [2021-08-21 11:04:04,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:04,375 INFO L276 IsEmpty]: Start isEmpty. Operand 4238 states and 11891 transitions. [2021-08-21 11:04:04,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:04:04,378 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:04,378 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:04:04,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 11:04:04,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 11:04:04,591 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:04,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:04,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1106530767, now seen corresponding path program 21 times [2021-08-21 11:04:04,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:04,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508257744] [2021-08-21 11:04:04,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:04,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:04,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:04,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:04,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508257744] [2021-08-21 11:04:04,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508257744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:04,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771831618] [2021-08-21 11:04:04,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:04:04,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:04,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:04,697 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:04:04,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 11:04:06,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:04:06,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:06,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:04:06,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:06,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:06,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771831618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:06,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:06,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:04:06,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072336668] [2021-08-21 11:04:06,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:04:06,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:06,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:04:06,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:04:06,875 INFO L87 Difference]: Start difference. First operand 4238 states and 11891 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:07,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:07,849 INFO L93 Difference]: Finished difference Result 8874 states and 24382 transitions. [2021-08-21 11:04:07,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 11:04:07,850 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 11:04:07,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:07,862 INFO L225 Difference]: With dead ends: 8874 [2021-08-21 11:04:07,862 INFO L226 Difference]: Without dead ends: 8492 [2021-08-21 11:04:07,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 851.8ms TimeCoverageRelationStatistics Valid=738, Invalid=2342, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 11:04:07,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8492 states. [2021-08-21 11:04:07,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8492 to 4043. [2021-08-21 11:04:07,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4043 states, 4042 states have (on average 2.7859970311726867) internal successors, (11261), 4042 states have internal predecessors, (11261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:07,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4043 states to 4043 states and 11261 transitions. [2021-08-21 11:04:07,923 INFO L78 Accepts]: Start accepts. Automaton has 4043 states and 11261 transitions. Word has length 57 [2021-08-21 11:04:07,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:07,923 INFO L470 AbstractCegarLoop]: Abstraction has 4043 states and 11261 transitions. [2021-08-21 11:04:07,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:07,924 INFO L276 IsEmpty]: Start isEmpty. Operand 4043 states and 11261 transitions. [2021-08-21 11:04:07,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:07,928 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:07,928 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:04:07,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 11:04:08,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-21 11:04:08,145 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:08,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:08,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1706934066, now seen corresponding path program 21 times [2021-08-21 11:04:08,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:08,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885827932] [2021-08-21 11:04:08,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:08,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:08,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:08,275 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:08,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:08,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885827932] [2021-08-21 11:04:08,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885827932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:08,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876177326] [2021-08-21 11:04:08,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:04:08,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:08,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:08,277 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:04:08,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 11:04:10,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 11:04:10,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:10,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:10,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:10,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876177326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:10,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:10,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:10,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945584054] [2021-08-21 11:04:10,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:10,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:10,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:10,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:10,678 INFO L87 Difference]: Start difference. First operand 4043 states and 11261 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:11,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:11,063 INFO L93 Difference]: Finished difference Result 6203 states and 16259 transitions. [2021-08-21 11:04:11,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 11:04:11,064 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:04:11,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:11,071 INFO L225 Difference]: With dead ends: 6203 [2021-08-21 11:04:11,071 INFO L226 Difference]: Without dead ends: 5811 [2021-08-21 11:04:11,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 451.2ms TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 11:04:11,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5811 states. [2021-08-21 11:04:11,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5811 to 4183. [2021-08-21 11:04:11,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 4182 states have (on average 2.764466762314682) internal successors, (11561), 4182 states have internal predecessors, (11561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:11,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 11561 transitions. [2021-08-21 11:04:11,121 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 11561 transitions. Word has length 62 [2021-08-21 11:04:11,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:11,121 INFO L470 AbstractCegarLoop]: Abstraction has 4183 states and 11561 transitions. [2021-08-21 11:04:11,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:11,121 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 11561 transitions. [2021-08-21 11:04:11,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:11,126 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:11,126 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:04:11,147 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 11:04:11,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:11,326 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:11,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:11,327 INFO L82 PathProgramCache]: Analyzing trace with hash -154199258, now seen corresponding path program 22 times [2021-08-21 11:04:11,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:11,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155772389] [2021-08-21 11:04:11,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:11,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:11,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:11,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155772389] [2021-08-21 11:04:11,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155772389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:11,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637982802] [2021-08-21 11:04:11,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:04:11,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:11,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:11,464 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:04:11,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 11:04:13,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:04:13,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:13,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:13,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:14,009 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:14,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637982802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:14,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:14,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:14,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617200129] [2021-08-21 11:04:14,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:14,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:14,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:14,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:14,011 INFO L87 Difference]: Start difference. First operand 4183 states and 11561 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:14,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:14,356 INFO L93 Difference]: Finished difference Result 6083 states and 15891 transitions. [2021-08-21 11:04:14,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 11:04:14,356 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:04:14,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:14,365 INFO L225 Difference]: With dead ends: 6083 [2021-08-21 11:04:14,365 INFO L226 Difference]: Without dead ends: 5931 [2021-08-21 11:04:14,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 417.1ms TimeCoverageRelationStatistics Valid=291, Invalid=765, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 11:04:14,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5931 states. [2021-08-21 11:04:14,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5931 to 4158. [2021-08-21 11:04:14,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4158 states, 4157 states have (on average 2.7678614385374067) internal successors, (11506), 4157 states have internal predecessors, (11506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:14,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4158 states to 4158 states and 11506 transitions. [2021-08-21 11:04:14,426 INFO L78 Accepts]: Start accepts. Automaton has 4158 states and 11506 transitions. Word has length 62 [2021-08-21 11:04:14,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:14,426 INFO L470 AbstractCegarLoop]: Abstraction has 4158 states and 11506 transitions. [2021-08-21 11:04:14,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:14,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4158 states and 11506 transitions. [2021-08-21 11:04:14,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:14,430 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:14,430 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:04:14,453 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 11:04:14,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 11:04:14,631 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:14,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:14,631 INFO L82 PathProgramCache]: Analyzing trace with hash 319128960, now seen corresponding path program 23 times [2021-08-21 11:04:14,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:14,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234779679] [2021-08-21 11:04:14,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:14,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:14,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:14,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:14,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234779679] [2021-08-21 11:04:14,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234779679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:14,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711344903] [2021-08-21 11:04:14,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:04:14,771 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:14,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:14,772 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:04:14,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 11:04:16,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:04:16,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:16,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:16,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:17,306 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:17,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711344903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:17,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:17,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:17,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827193278] [2021-08-21 11:04:17,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:17,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:17,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:17,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:17,308 INFO L87 Difference]: Start difference. First operand 4158 states and 11506 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:17,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:17,617 INFO L93 Difference]: Finished difference Result 6068 states and 15866 transitions. [2021-08-21 11:04:17,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 11:04:17,617 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:04:17,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:17,626 INFO L225 Difference]: With dead ends: 6068 [2021-08-21 11:04:17,626 INFO L226 Difference]: Without dead ends: 5916 [2021-08-21 11:04:17,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 361.3ms TimeCoverageRelationStatistics Valid=294, Invalid=762, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 11:04:17,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5916 states. [2021-08-21 11:04:17,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5916 to 4173. [2021-08-21 11:04:17,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4173 states, 4172 states have (on average 2.7651006711409396) internal successors, (11536), 4172 states have internal predecessors, (11536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4173 states to 4173 states and 11536 transitions. [2021-08-21 11:04:17,685 INFO L78 Accepts]: Start accepts. Automaton has 4173 states and 11536 transitions. Word has length 62 [2021-08-21 11:04:17,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:17,686 INFO L470 AbstractCegarLoop]: Abstraction has 4173 states and 11536 transitions. [2021-08-21 11:04:17,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 4173 states and 11536 transitions. [2021-08-21 11:04:17,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:17,691 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:17,691 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:04:17,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-21 11:04:17,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:17,891 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:17,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:17,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1371346866, now seen corresponding path program 24 times [2021-08-21 11:04:17,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:17,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512261567] [2021-08-21 11:04:17,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:17,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:18,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:18,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:18,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512261567] [2021-08-21 11:04:18,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512261567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:18,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628775491] [2021-08-21 11:04:18,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:04:18,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:18,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:18,026 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:04:18,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 11:04:19,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 11:04:19,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:19,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:19,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:20,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628775491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:20,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:20,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:20,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282131018] [2021-08-21 11:04:20,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:20,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:20,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:20,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:20,522 INFO L87 Difference]: Start difference. First operand 4173 states and 11536 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:20,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:20,850 INFO L93 Difference]: Finished difference Result 6107 states and 15939 transitions. [2021-08-21 11:04:20,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 11:04:20,850 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:04:20,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:20,858 INFO L225 Difference]: With dead ends: 6107 [2021-08-21 11:04:20,858 INFO L226 Difference]: Without dead ends: 5955 [2021-08-21 11:04:20,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 354.9ms TimeCoverageRelationStatistics Valid=312, Invalid=878, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 11:04:20,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5955 states. [2021-08-21 11:04:20,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5955 to 4233. [2021-08-21 11:04:20,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4233 states, 4232 states have (on average 2.7577977315689983) internal successors, (11671), 4232 states have internal predecessors, (11671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:20,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4233 states to 4233 states and 11671 transitions. [2021-08-21 11:04:20,917 INFO L78 Accepts]: Start accepts. Automaton has 4233 states and 11671 transitions. Word has length 62 [2021-08-21 11:04:20,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:20,917 INFO L470 AbstractCegarLoop]: Abstraction has 4233 states and 11671 transitions. [2021-08-21 11:04:20,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:20,917 INFO L276 IsEmpty]: Start isEmpty. Operand 4233 states and 11671 transitions. [2021-08-21 11:04:20,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:20,921 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:20,921 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:04:20,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-21 11:04:21,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-21 11:04:21,122 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:21,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:21,122 INFO L82 PathProgramCache]: Analyzing trace with hash -673988182, now seen corresponding path program 25 times [2021-08-21 11:04:21,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:21,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71979343] [2021-08-21 11:04:21,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:21,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:21,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:21,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71979343] [2021-08-21 11:04:21,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71979343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:21,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056579401] [2021-08-21 11:04:21,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:04:21,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:21,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:21,252 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:04:21,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 11:04:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:23,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:23,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:23,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056579401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:23,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:23,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:23,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2283651] [2021-08-21 11:04:23,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:23,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:23,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:23,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:23,813 INFO L87 Difference]: Start difference. First operand 4233 states and 11671 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:24,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:24,234 INFO L93 Difference]: Finished difference Result 6188 states and 16106 transitions. [2021-08-21 11:04:24,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 11:04:24,234 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:04:24,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:24,242 INFO L225 Difference]: With dead ends: 6188 [2021-08-21 11:04:24,242 INFO L226 Difference]: Without dead ends: 6036 [2021-08-21 11:04:24,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 401.3ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 11:04:24,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6036 states. [2021-08-21 11:04:24,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6036 to 4273. [2021-08-21 11:04:24,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4273 states, 4272 states have (on average 2.75187265917603) internal successors, (11756), 4272 states have internal predecessors, (11756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:24,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4273 states to 4273 states and 11756 transitions. [2021-08-21 11:04:24,294 INFO L78 Accepts]: Start accepts. Automaton has 4273 states and 11756 transitions. Word has length 62 [2021-08-21 11:04:24,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:24,295 INFO L470 AbstractCegarLoop]: Abstraction has 4273 states and 11756 transitions. [2021-08-21 11:04:24,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:24,295 INFO L276 IsEmpty]: Start isEmpty. Operand 4273 states and 11756 transitions. [2021-08-21 11:04:24,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:24,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:24,299 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:04:24,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-21 11:04:24,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:24,500 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:24,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:24,500 INFO L82 PathProgramCache]: Analyzing trace with hash 995646372, now seen corresponding path program 26 times [2021-08-21 11:04:24,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:24,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092990164] [2021-08-21 11:04:24,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:24,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:24,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:24,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092990164] [2021-08-21 11:04:24,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092990164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:24,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560002014] [2021-08-21 11:04:24,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:04:24,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:24,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:24,634 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:04:24,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 11:04:26,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:04:26,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:26,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:26,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:27,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560002014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:27,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:27,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:27,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715592571] [2021-08-21 11:04:27,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:27,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:27,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:27,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:27,282 INFO L87 Difference]: Start difference. First operand 4273 states and 11756 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:27,787 INFO L93 Difference]: Finished difference Result 6411 states and 16707 transitions. [2021-08-21 11:04:27,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 11:04:27,788 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:04:27,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:27,795 INFO L225 Difference]: With dead ends: 6411 [2021-08-21 11:04:27,795 INFO L226 Difference]: Without dead ends: 6019 [2021-08-21 11:04:27,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 478.4ms TimeCoverageRelationStatistics Valid=377, Invalid=1183, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 11:04:27,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6019 states. [2021-08-21 11:04:27,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6019 to 4213. [2021-08-21 11:04:27,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 4212 states have (on average 2.7585470085470085) internal successors, (11619), 4212 states have internal predecessors, (11619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 11619 transitions. [2021-08-21 11:04:27,843 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 11619 transitions. Word has length 62 [2021-08-21 11:04:27,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:27,843 INFO L470 AbstractCegarLoop]: Abstraction has 4213 states and 11619 transitions. [2021-08-21 11:04:27,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:27,843 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 11619 transitions. [2021-08-21 11:04:27,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:27,846 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:27,847 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:04:27,867 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 11:04:28,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:28,047 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:28,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:28,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1223486810, now seen corresponding path program 27 times [2021-08-21 11:04:28,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:28,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634921170] [2021-08-21 11:04:28,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:28,048 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:28,179 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:28,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:28,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634921170] [2021-08-21 11:04:28,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634921170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:28,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593045241] [2021-08-21 11:04:28,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:04:28,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:28,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:28,185 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:04:28,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 11:04:30,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 11:04:30,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:30,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:30,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:31,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593045241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:31,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:31,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:31,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082396643] [2021-08-21 11:04:31,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:31,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:31,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:31,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:31,016 INFO L87 Difference]: Start difference. First operand 4213 states and 11619 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:31,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:31,405 INFO L93 Difference]: Finished difference Result 6205 states and 16145 transitions. [2021-08-21 11:04:31,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 11:04:31,406 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:04:31,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:31,413 INFO L225 Difference]: With dead ends: 6205 [2021-08-21 11:04:31,414 INFO L226 Difference]: Without dead ends: 6053 [2021-08-21 11:04:31,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 429.4ms TimeCoverageRelationStatistics Valid=365, Invalid=1041, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 11:04:31,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6053 states. [2021-08-21 11:04:31,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6053 to 4308. [2021-08-21 11:04:31,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4308 states, 4307 states have (on average 2.7462270722080335) internal successors, (11828), 4307 states have internal predecessors, (11828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:31,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4308 states to 4308 states and 11828 transitions. [2021-08-21 11:04:31,465 INFO L78 Accepts]: Start accepts. Automaton has 4308 states and 11828 transitions. Word has length 62 [2021-08-21 11:04:31,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:31,465 INFO L470 AbstractCegarLoop]: Abstraction has 4308 states and 11828 transitions. [2021-08-21 11:04:31,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:31,465 INFO L276 IsEmpty]: Start isEmpty. Operand 4308 states and 11828 transitions. [2021-08-21 11:04:31,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:31,469 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:31,469 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:04:31,490 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 11:04:31,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 11:04:31,670 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:31,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:31,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1026145438, now seen corresponding path program 28 times [2021-08-21 11:04:31,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:31,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124297301] [2021-08-21 11:04:31,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:31,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:31,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:31,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124297301] [2021-08-21 11:04:31,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124297301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:31,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074645527] [2021-08-21 11:04:31,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:04:31,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:31,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:31,813 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:04:31,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 11:04:34,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:04:34,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:34,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:34,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:34,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074645527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:34,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:34,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:34,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724735522] [2021-08-21 11:04:34,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:34,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:34,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:34,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:34,531 INFO L87 Difference]: Start difference. First operand 4308 states and 11828 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:34,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:34,978 INFO L93 Difference]: Finished difference Result 6423 states and 16583 transitions. [2021-08-21 11:04:34,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 11:04:34,978 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:04:34,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:34,987 INFO L225 Difference]: With dead ends: 6423 [2021-08-21 11:04:34,987 INFO L226 Difference]: Without dead ends: 6271 [2021-08-21 11:04:34,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 481.1ms TimeCoverageRelationStatistics Valid=402, Invalid=1158, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 11:04:34,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6271 states. [2021-08-21 11:04:35,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6271 to 4378. [2021-08-21 11:04:35,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4378 states, 4377 states have (on average 2.736806031528444) internal successors, (11979), 4377 states have internal predecessors, (11979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:35,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 11979 transitions. [2021-08-21 11:04:35,070 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 11979 transitions. Word has length 62 [2021-08-21 11:04:35,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:35,070 INFO L470 AbstractCegarLoop]: Abstraction has 4378 states and 11979 transitions. [2021-08-21 11:04:35,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:35,070 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 11979 transitions. [2021-08-21 11:04:35,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:35,074 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:35,074 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:04:35,096 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 11:04:35,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 11:04:35,275 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:35,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:35,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1599187304, now seen corresponding path program 29 times [2021-08-21 11:04:35,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:35,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888921516] [2021-08-21 11:04:35,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:35,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:35,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:35,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888921516] [2021-08-21 11:04:35,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888921516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:35,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926387954] [2021-08-21 11:04:35,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:04:35,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:35,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:35,404 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:04:35,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 11:04:37,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:04:37,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:37,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:37,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:38,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926387954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:38,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:38,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:38,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364222267] [2021-08-21 11:04:38,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:38,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:38,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:38,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:38,150 INFO L87 Difference]: Start difference. First operand 4378 states and 11979 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:38,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:38,593 INFO L93 Difference]: Finished difference Result 6463 states and 16671 transitions. [2021-08-21 11:04:38,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 11:04:38,593 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:04:38,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:38,602 INFO L225 Difference]: With dead ends: 6463 [2021-08-21 11:04:38,602 INFO L226 Difference]: Without dead ends: 6311 [2021-08-21 11:04:38,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 458.2ms TimeCoverageRelationStatistics Valid=432, Invalid=1208, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 11:04:38,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2021-08-21 11:04:38,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 4353. [2021-08-21 11:04:38,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.740579044117647) internal successors, (11927), 4352 states have internal predecessors, (11927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:38,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 11927 transitions. [2021-08-21 11:04:38,661 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 11927 transitions. Word has length 62 [2021-08-21 11:04:38,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:38,661 INFO L470 AbstractCegarLoop]: Abstraction has 4353 states and 11927 transitions. [2021-08-21 11:04:38,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:38,661 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 11927 transitions. [2021-08-21 11:04:38,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:38,667 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:38,667 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:04:38,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 11:04:38,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-21 11:04:38,881 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:38,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:38,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1188355682, now seen corresponding path program 22 times [2021-08-21 11:04:38,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:38,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302390623] [2021-08-21 11:04:38,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:38,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:39,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:39,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302390623] [2021-08-21 11:04:39,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302390623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:39,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869522651] [2021-08-21 11:04:39,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:04:39,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:39,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:39,039 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:04:39,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 11:04:41,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:04:41,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:41,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:41,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:41,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869522651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:41,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:41,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:41,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392104733] [2021-08-21 11:04:41,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:41,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:41,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:41,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:41,881 INFO L87 Difference]: Start difference. First operand 4353 states and 11927 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:42,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:42,329 INFO L93 Difference]: Finished difference Result 6423 states and 16719 transitions. [2021-08-21 11:04:42,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 11:04:42,329 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:04:42,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:42,338 INFO L225 Difference]: With dead ends: 6423 [2021-08-21 11:04:42,338 INFO L226 Difference]: Without dead ends: 6031 [2021-08-21 11:04:42,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 475.9ms TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 11:04:42,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6031 states. [2021-08-21 11:04:42,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6031 to 4437. [2021-08-21 11:04:42,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4437 states, 4436 states have (on average 2.727457168620379) internal successors, (12099), 4436 states have internal predecessors, (12099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4437 states to 4437 states and 12099 transitions. [2021-08-21 11:04:42,393 INFO L78 Accepts]: Start accepts. Automaton has 4437 states and 12099 transitions. Word has length 62 [2021-08-21 11:04:42,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:42,393 INFO L470 AbstractCegarLoop]: Abstraction has 4437 states and 12099 transitions. [2021-08-21 11:04:42,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:42,393 INFO L276 IsEmpty]: Start isEmpty. Operand 4437 states and 12099 transitions. [2021-08-21 11:04:42,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:42,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:42,397 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:04:42,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 11:04:42,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-21 11:04:42,598 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:42,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:42,598 INFO L82 PathProgramCache]: Analyzing trace with hash 407535224, now seen corresponding path program 30 times [2021-08-21 11:04:42,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:42,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585617592] [2021-08-21 11:04:42,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:42,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:42,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:42,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585617592] [2021-08-21 11:04:42,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585617592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:42,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470754736] [2021-08-21 11:04:42,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:04:42,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:42,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:42,741 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:04:42,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 11:04:45,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:04:45,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:45,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:45,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:45,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470754736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:45,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:45,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:45,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700443218] [2021-08-21 11:04:45,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:45,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:45,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:45,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:45,680 INFO L87 Difference]: Start difference. First operand 4437 states and 12099 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:46,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:46,136 INFO L93 Difference]: Finished difference Result 6124 states and 15978 transitions. [2021-08-21 11:04:46,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 11:04:46,136 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:04:46,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:46,144 INFO L225 Difference]: With dead ends: 6124 [2021-08-21 11:04:46,144 INFO L226 Difference]: Without dead ends: 5972 [2021-08-21 11:04:46,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 471.6ms TimeCoverageRelationStatistics Valid=342, Invalid=990, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 11:04:46,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5972 states. [2021-08-21 11:04:46,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5972 to 4362. [2021-08-21 11:04:46,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4362 states, 4361 states have (on average 2.736528319192846) internal successors, (11934), 4361 states have internal predecessors, (11934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:46,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4362 states to 4362 states and 11934 transitions. [2021-08-21 11:04:46,193 INFO L78 Accepts]: Start accepts. Automaton has 4362 states and 11934 transitions. Word has length 62 [2021-08-21 11:04:46,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:46,193 INFO L470 AbstractCegarLoop]: Abstraction has 4362 states and 11934 transitions. [2021-08-21 11:04:46,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:46,194 INFO L276 IsEmpty]: Start isEmpty. Operand 4362 states and 11934 transitions. [2021-08-21 11:04:46,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:46,197 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:46,198 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:04:46,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 11:04:46,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-21 11:04:46,398 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:46,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:46,399 INFO L82 PathProgramCache]: Analyzing trace with hash 153865568, now seen corresponding path program 23 times [2021-08-21 11:04:46,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:46,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998732783] [2021-08-21 11:04:46,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:46,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:46,539 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:46,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:46,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998732783] [2021-08-21 11:04:46,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998732783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:46,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440036844] [2021-08-21 11:04:46,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:04:46,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:46,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:46,541 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:04:46,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 11:04:49,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:04:49,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:49,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:49,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:49,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440036844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:49,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:49,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:49,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741290439] [2021-08-21 11:04:49,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:49,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:49,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:49,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:49,559 INFO L87 Difference]: Start difference. First operand 4362 states and 11934 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:49,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:49,933 INFO L93 Difference]: Finished difference Result 6757 states and 17377 transitions. [2021-08-21 11:04:49,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 11:04:49,933 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:04:49,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:49,943 INFO L225 Difference]: With dead ends: 6757 [2021-08-21 11:04:49,943 INFO L226 Difference]: Without dead ends: 6365 [2021-08-21 11:04:49,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 11:04:49,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6365 states. [2021-08-21 11:04:49,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6365 to 4412. [2021-08-21 11:04:49,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4412 states, 4411 states have (on average 2.7304466107458625) internal successors, (12044), 4411 states have internal predecessors, (12044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:50,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4412 states to 4412 states and 12044 transitions. [2021-08-21 11:04:50,001 INFO L78 Accepts]: Start accepts. Automaton has 4412 states and 12044 transitions. Word has length 62 [2021-08-21 11:04:50,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:50,001 INFO L470 AbstractCegarLoop]: Abstraction has 4412 states and 12044 transitions. [2021-08-21 11:04:50,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:50,001 INFO L276 IsEmpty]: Start isEmpty. Operand 4412 states and 12044 transitions. [2021-08-21 11:04:50,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:50,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:50,006 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:04:50,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 11:04:50,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 11:04:50,218 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:50,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:50,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1707267756, now seen corresponding path program 31 times [2021-08-21 11:04:50,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:50,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134644820] [2021-08-21 11:04:50,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:50,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:50,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:50,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134644820] [2021-08-21 11:04:50,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134644820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:50,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343781586] [2021-08-21 11:04:50,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:04:50,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:50,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:50,347 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:04:50,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 11:04:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:52,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:52,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:53,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343781586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:53,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:53,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:53,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926620034] [2021-08-21 11:04:53,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:53,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:53,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:53,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:53,368 INFO L87 Difference]: Start difference. First operand 4412 states and 12044 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:53,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:53,742 INFO L93 Difference]: Finished difference Result 6677 states and 17089 transitions. [2021-08-21 11:04:53,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 11:04:53,743 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:04:53,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:53,752 INFO L225 Difference]: With dead ends: 6677 [2021-08-21 11:04:53,752 INFO L226 Difference]: Without dead ends: 6525 [2021-08-21 11:04:53,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 397.1ms TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 11:04:53,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6525 states. [2021-08-21 11:04:53,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6525 to 4412. [2021-08-21 11:04:53,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4412 states, 4411 states have (on average 2.7304466107458625) internal successors, (12044), 4411 states have internal predecessors, (12044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:53,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4412 states to 4412 states and 12044 transitions. [2021-08-21 11:04:53,820 INFO L78 Accepts]: Start accepts. Automaton has 4412 states and 12044 transitions. Word has length 62 [2021-08-21 11:04:53,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:53,820 INFO L470 AbstractCegarLoop]: Abstraction has 4412 states and 12044 transitions. [2021-08-21 11:04:53,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:53,820 INFO L276 IsEmpty]: Start isEmpty. Operand 4412 states and 12044 transitions. [2021-08-21 11:04:53,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:53,824 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:53,824 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:04:53,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-21 11:04:54,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:54,025 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:54,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:54,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1233939538, now seen corresponding path program 32 times [2021-08-21 11:04:54,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:54,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874938096] [2021-08-21 11:04:54,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:54,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:54,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:54,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:54,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874938096] [2021-08-21 11:04:54,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874938096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:54,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507259706] [2021-08-21 11:04:54,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:04:54,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:54,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:54,150 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:04:54,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 11:04:56,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:04:56,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:56,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:56,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:57,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507259706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:57,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:57,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:57,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944197750] [2021-08-21 11:04:57,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:57,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:57,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:57,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:57,195 INFO L87 Difference]: Start difference. First operand 4412 states and 12044 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:57,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:57,582 INFO L93 Difference]: Finished difference Result 6702 states and 17144 transitions. [2021-08-21 11:04:57,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 11:04:57,583 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:04:57,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:57,591 INFO L225 Difference]: With dead ends: 6702 [2021-08-21 11:04:57,591 INFO L226 Difference]: Without dead ends: 6550 [2021-08-21 11:04:57,591 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 407.8ms TimeCoverageRelationStatistics Valid=315, Invalid=875, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 11:04:57,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6550 states. [2021-08-21 11:04:57,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6550 to 4452. [2021-08-21 11:04:57,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4452 states, 4451 states have (on average 2.725005616715345) internal successors, (12129), 4451 states have internal predecessors, (12129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4452 states to 4452 states and 12129 transitions. [2021-08-21 11:04:57,645 INFO L78 Accepts]: Start accepts. Automaton has 4452 states and 12129 transitions. Word has length 62 [2021-08-21 11:04:57,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:57,645 INFO L470 AbstractCegarLoop]: Abstraction has 4452 states and 12129 transitions. [2021-08-21 11:04:57,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:57,645 INFO L276 IsEmpty]: Start isEmpty. Operand 4452 states and 12129 transitions. [2021-08-21 11:04:57,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:57,649 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:57,649 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:04:57,671 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 11:04:57,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:57,850 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:57,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:57,850 INFO L82 PathProgramCache]: Analyzing trace with hash -181721632, now seen corresponding path program 33 times [2021-08-21 11:04:57,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:57,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45923108] [2021-08-21 11:04:57,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:57,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:57,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:57,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45923108] [2021-08-21 11:04:57,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45923108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:57,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62422845] [2021-08-21 11:04:57,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:04:57,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:57,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:57,971 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:04:57,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 11:05:00,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:05:00,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:05:00,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:05:00,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:05:01,037 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:01,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62422845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:01,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:05:01,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:05:01,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829869344] [2021-08-21 11:05:01,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:05:01,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:05:01,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:05:01,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:05:01,038 INFO L87 Difference]: Start difference. First operand 4452 states and 12129 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:01,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:05:01,523 INFO L93 Difference]: Finished difference Result 6838 states and 17416 transitions. [2021-08-21 11:05:01,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 11:05:01,524 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:05:01,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:05:01,531 INFO L225 Difference]: With dead ends: 6838 [2021-08-21 11:05:01,531 INFO L226 Difference]: Without dead ends: 6686 [2021-08-21 11:05:01,532 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 476.0ms TimeCoverageRelationStatistics Valid=413, Invalid=1227, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 11:05:01,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6686 states. [2021-08-21 11:05:01,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6686 to 4462. [2021-08-21 11:05:01,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4462 states, 4461 states have (on average 2.72450123290742) internal successors, (12154), 4461 states have internal predecessors, (12154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:01,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4462 states to 4462 states and 12154 transitions. [2021-08-21 11:05:01,583 INFO L78 Accepts]: Start accepts. Automaton has 4462 states and 12154 transitions. Word has length 62 [2021-08-21 11:05:01,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:05:01,583 INFO L470 AbstractCegarLoop]: Abstraction has 4462 states and 12154 transitions. [2021-08-21 11:05:01,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:01,583 INFO L276 IsEmpty]: Start isEmpty. Operand 4462 states and 12154 transitions. [2021-08-21 11:05:01,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:05:01,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:05:01,587 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:05:01,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 11:05:01,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:05:01,788 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:05:01,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:05:01,788 INFO L82 PathProgramCache]: Analyzing trace with hash 2067910616, now seen corresponding path program 34 times [2021-08-21 11:05:01,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:05:01,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888836269] [2021-08-21 11:05:01,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:05:01,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:05:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:05:01,921 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:01,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:05:01,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888836269] [2021-08-21 11:05:01,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888836269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:01,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321035323] [2021-08-21 11:05:01,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:05:01,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:05:01,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:05:01,922 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:05:01,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 11:05:04,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:05:04,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:05:04,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:05:04,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:05:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:05,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321035323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:05,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:05:05,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:05:05,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113961939] [2021-08-21 11:05:05,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:05:05,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:05:05,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:05:05,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:05:05,156 INFO L87 Difference]: Start difference. First operand 4462 states and 12154 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:05,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:05:05,624 INFO L93 Difference]: Finished difference Result 6828 states and 17386 transitions. [2021-08-21 11:05:05,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 11:05:05,625 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:05:05,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:05:05,633 INFO L225 Difference]: With dead ends: 6828 [2021-08-21 11:05:05,634 INFO L226 Difference]: Without dead ends: 6676 [2021-08-21 11:05:05,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 458.9ms TimeCoverageRelationStatistics Valid=409, Invalid=1151, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 11:05:05,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6676 states. [2021-08-21 11:05:05,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6676 to 4502. [2021-08-21 11:05:05,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4502 states, 4501 states have (on average 2.7191735169962232) internal successors, (12239), 4501 states have internal predecessors, (12239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:05,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4502 states to 4502 states and 12239 transitions. [2021-08-21 11:05:05,692 INFO L78 Accepts]: Start accepts. Automaton has 4502 states and 12239 transitions. Word has length 62 [2021-08-21 11:05:05,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:05:05,692 INFO L470 AbstractCegarLoop]: Abstraction has 4502 states and 12239 transitions. [2021-08-21 11:05:05,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:05,693 INFO L276 IsEmpty]: Start isEmpty. Operand 4502 states and 12239 transitions. [2021-08-21 11:05:05,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:05:05,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:05:05,697 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:05:05,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-21 11:05:05,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:05:05,898 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:05:05,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:05:05,898 INFO L82 PathProgramCache]: Analyzing trace with hash -557422126, now seen corresponding path program 35 times [2021-08-21 11:05:05,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:05:05,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567025978] [2021-08-21 11:05:05,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:05:05,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:05:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:05:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:06,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:05:06,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567025978] [2021-08-21 11:05:06,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567025978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:06,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691650599] [2021-08-21 11:05:06,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:05:06,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:05:06,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:05:06,029 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:05:06,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 11:05:08,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:05:08,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:05:08,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:05:08,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:05:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:09,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691650599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:09,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:05:09,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:05:09,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943430568] [2021-08-21 11:05:09,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:05:09,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:05:09,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:05:09,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:05:09,256 INFO L87 Difference]: Start difference. First operand 4502 states and 12239 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:09,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:05:09,813 INFO L93 Difference]: Finished difference Result 7073 states and 18029 transitions. [2021-08-21 11:05:09,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 11:05:09,814 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:05:09,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:05:09,823 INFO L225 Difference]: With dead ends: 7073 [2021-08-21 11:05:09,823 INFO L226 Difference]: Without dead ends: 6681 [2021-08-21 11:05:09,824 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 538.9ms TimeCoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 11:05:09,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6681 states. [2021-08-21 11:05:09,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6681 to 4412. [2021-08-21 11:05:09,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4412 states, 4411 states have (on average 2.7304466107458625) internal successors, (12044), 4411 states have internal predecessors, (12044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:09,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4412 states to 4412 states and 12044 transitions. [2021-08-21 11:05:09,879 INFO L78 Accepts]: Start accepts. Automaton has 4412 states and 12044 transitions. Word has length 62 [2021-08-21 11:05:09,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:05:09,880 INFO L470 AbstractCegarLoop]: Abstraction has 4412 states and 12044 transitions. [2021-08-21 11:05:09,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:09,880 INFO L276 IsEmpty]: Start isEmpty. Operand 4412 states and 12044 transitions. [2021-08-21 11:05:09,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:05:09,884 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:05:09,884 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:05:09,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-21 11:05:10,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-21 11:05:10,085 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:05:10,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:05:10,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1247158160, now seen corresponding path program 24 times [2021-08-21 11:05:10,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:05:10,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176119613] [2021-08-21 11:05:10,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:05:10,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:05:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:05:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:10,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:05:10,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176119613] [2021-08-21 11:05:10,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176119613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:10,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392617275] [2021-08-21 11:05:10,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:05:10,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:05:10,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:05:10,217 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:05:10,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 11:05:13,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 11:05:13,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:05:13,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:05:13,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:05:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:13,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392617275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:13,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:05:13,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:05:13,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319577973] [2021-08-21 11:05:13,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:05:13,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:05:13,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:05:13,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:05:13,513 INFO L87 Difference]: Start difference. First operand 4412 states and 12044 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:13,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:05:13,984 INFO L93 Difference]: Finished difference Result 6997 states and 17857 transitions. [2021-08-21 11:05:13,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 11:05:13,984 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:05:13,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:05:13,998 INFO L225 Difference]: With dead ends: 6997 [2021-08-21 11:05:13,998 INFO L226 Difference]: Without dead ends: 6605 [2021-08-21 11:05:13,999 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 434.3ms TimeCoverageRelationStatistics Valid=326, Invalid=1006, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 11:05:14,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6605 states. [2021-08-21 11:05:14,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6605 to 4462. [2021-08-21 11:05:14,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4462 states, 4461 states have (on average 2.72450123290742) internal successors, (12154), 4461 states have internal predecessors, (12154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:14,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4462 states to 4462 states and 12154 transitions. [2021-08-21 11:05:14,061 INFO L78 Accepts]: Start accepts. Automaton has 4462 states and 12154 transitions. Word has length 62 [2021-08-21 11:05:14,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:05:14,061 INFO L470 AbstractCegarLoop]: Abstraction has 4462 states and 12154 transitions. [2021-08-21 11:05:14,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:14,062 INFO L276 IsEmpty]: Start isEmpty. Operand 4462 states and 12154 transitions. [2021-08-21 11:05:14,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:05:14,068 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:05:14,068 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:05:14,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 11:05:14,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-21 11:05:14,281 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:05:14,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:05:14,281 INFO L82 PathProgramCache]: Analyzing trace with hash -613975164, now seen corresponding path program 36 times [2021-08-21 11:05:14,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:05:14,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642423472] [2021-08-21 11:05:14,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:05:14,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:05:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:05:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:14,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:05:14,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642423472] [2021-08-21 11:05:14,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642423472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:14,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094501048] [2021-08-21 11:05:14,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:05:14,419 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:05:14,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:05:14,420 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:05:14,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 11:05:17,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:05:17,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:05:17,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:05:17,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:05:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:17,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094501048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:17,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:05:17,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:05:17,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740304147] [2021-08-21 11:05:17,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:05:17,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:05:17,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:05:17,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:05:17,768 INFO L87 Difference]: Start difference. First operand 4462 states and 12154 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:18,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:05:18,154 INFO L93 Difference]: Finished difference Result 6917 states and 17569 transitions. [2021-08-21 11:05:18,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 11:05:18,154 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:05:18,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:05:18,166 INFO L225 Difference]: With dead ends: 6917 [2021-08-21 11:05:18,166 INFO L226 Difference]: Without dead ends: 6765 [2021-08-21 11:05:18,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 414.6ms TimeCoverageRelationStatistics Valid=349, Invalid=983, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 11:05:18,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6765 states. [2021-08-21 11:05:18,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6765 to 4462. [2021-08-21 11:05:18,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4462 states, 4461 states have (on average 2.72450123290742) internal successors, (12154), 4461 states have internal predecessors, (12154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:18,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4462 states to 4462 states and 12154 transitions. [2021-08-21 11:05:18,248 INFO L78 Accepts]: Start accepts. Automaton has 4462 states and 12154 transitions. Word has length 62 [2021-08-21 11:05:18,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:05:18,249 INFO L470 AbstractCegarLoop]: Abstraction has 4462 states and 12154 transitions. [2021-08-21 11:05:18,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:18,249 INFO L276 IsEmpty]: Start isEmpty. Operand 4462 states and 12154 transitions. [2021-08-21 11:05:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:05:18,255 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:05:18,255 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:05:18,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 11:05:18,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:05:18,457 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:05:18,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:05:18,457 INFO L82 PathProgramCache]: Analyzing trace with hash -140646946, now seen corresponding path program 37 times [2021-08-21 11:05:18,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:05:18,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939733055] [2021-08-21 11:05:18,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:05:18,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:05:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:05:18,590 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:18,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:05:18,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939733055] [2021-08-21 11:05:18,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939733055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:18,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362154480] [2021-08-21 11:05:18,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:05:18,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:05:18,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:05:18,591 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:05:18,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 11:05:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:05:21,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:05:21,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:05:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:21,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362154480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:21,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:05:21,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:05:21,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794595156] [2021-08-21 11:05:21,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:05:21,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:05:21,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:05:21,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:05:21,913 INFO L87 Difference]: Start difference. First operand 4462 states and 12154 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:22,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:05:22,327 INFO L93 Difference]: Finished difference Result 6982 states and 17704 transitions. [2021-08-21 11:05:22,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 11:05:22,327 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:05:22,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:05:22,335 INFO L225 Difference]: With dead ends: 6982 [2021-08-21 11:05:22,336 INFO L226 Difference]: Without dead ends: 6830 [2021-08-21 11:05:22,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 390.9ms TimeCoverageRelationStatistics Valid=323, Invalid=937, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 11:05:22,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6830 states. [2021-08-21 11:05:22,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6830 to 4502. [2021-08-21 11:05:22,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4502 states, 4501 states have (on average 2.7191735169962232) internal successors, (12239), 4501 states have internal predecessors, (12239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:22,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4502 states to 4502 states and 12239 transitions. [2021-08-21 11:05:22,390 INFO L78 Accepts]: Start accepts. Automaton has 4502 states and 12239 transitions. Word has length 62 [2021-08-21 11:05:22,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:05:22,391 INFO L470 AbstractCegarLoop]: Abstraction has 4502 states and 12239 transitions. [2021-08-21 11:05:22,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:22,391 INFO L276 IsEmpty]: Start isEmpty. Operand 4502 states and 12239 transitions. [2021-08-21 11:05:22,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:05:22,395 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:05:22,395 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:05:22,417 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 11:05:22,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:05:22,597 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:05:22,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:05:22,597 INFO L82 PathProgramCache]: Analyzing trace with hash -215142560, now seen corresponding path program 25 times [2021-08-21 11:05:22,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:05:22,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639569002] [2021-08-21 11:05:22,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:05:22,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:05:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:05:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:22,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:05:22,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639569002] [2021-08-21 11:05:22,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639569002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:22,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906556076] [2021-08-21 11:05:22,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:05:22,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:05:22,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:05:22,711 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:05:22,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 11:05:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:05:25,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:05:25,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:05:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:26,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906556076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:26,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:05:26,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:05:26,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776122246] [2021-08-21 11:05:26,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:05:26,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:05:26,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:05:26,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:05:26,085 INFO L87 Difference]: Start difference. First operand 4502 states and 12239 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:26,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:05:26,503 INFO L93 Difference]: Finished difference Result 7267 states and 18417 transitions. [2021-08-21 11:05:26,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 11:05:26,504 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:05:26,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:05:26,513 INFO L225 Difference]: With dead ends: 7267 [2021-08-21 11:05:26,513 INFO L226 Difference]: Without dead ends: 6875 [2021-08-21 11:05:26,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 401.6ms TimeCoverageRelationStatistics Valid=340, Invalid=1066, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 11:05:26,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6875 states. [2021-08-21 11:05:26,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6875 to 4545. [2021-08-21 11:05:26,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4545 states, 4544 states have (on average 2.7161091549295775) internal successors, (12342), 4544 states have internal predecessors, (12342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:26,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4545 states to 4545 states and 12342 transitions. [2021-08-21 11:05:26,603 INFO L78 Accepts]: Start accepts. Automaton has 4545 states and 12342 transitions. Word has length 62 [2021-08-21 11:05:26,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:05:26,603 INFO L470 AbstractCegarLoop]: Abstraction has 4545 states and 12342 transitions. [2021-08-21 11:05:26,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:26,603 INFO L276 IsEmpty]: Start isEmpty. Operand 4545 states and 12342 transitions. [2021-08-21 11:05:26,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:05:26,607 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:05:26,607 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:05:26,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 11:05:26,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 11:05:26,808 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:05:26,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:05:26,808 INFO L82 PathProgramCache]: Analyzing trace with hash -739534772, now seen corresponding path program 26 times [2021-08-21 11:05:26,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:05:26,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024667614] [2021-08-21 11:05:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:05:26,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:05:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:05:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:26,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:05:26,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024667614] [2021-08-21 11:05:26,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024667614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:26,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019233266] [2021-08-21 11:05:26,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:05:26,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:05:26,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:05:26,919 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:05:26,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 11:05:29,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:05:29,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:05:29,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:05:29,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:05:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:30,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019233266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:30,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:05:30,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:05:30,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622920121] [2021-08-21 11:05:30,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:05:30,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:05:30,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:05:30,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:05:30,374 INFO L87 Difference]: Start difference. First operand 4545 states and 12342 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:30,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:05:30,984 INFO L93 Difference]: Finished difference Result 8844 states and 22873 transitions. [2021-08-21 11:05:30,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 11:05:30,985 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:05:30,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:05:31,037 INFO L225 Difference]: With dead ends: 8844 [2021-08-21 11:05:31,037 INFO L226 Difference]: Without dead ends: 8452 [2021-08-21 11:05:31,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 558.7ms TimeCoverageRelationStatistics Valid=424, Invalid=1382, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 11:05:31,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8452 states. [2021-08-21 11:05:31,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8452 to 5025. [2021-08-21 11:05:31,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5025 states, 5024 states have (on average 2.7503980891719744) internal successors, (13818), 5024 states have internal predecessors, (13818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:31,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5025 states to 5025 states and 13818 transitions. [2021-08-21 11:05:31,104 INFO L78 Accepts]: Start accepts. Automaton has 5025 states and 13818 transitions. Word has length 62 [2021-08-21 11:05:31,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:05:31,104 INFO L470 AbstractCegarLoop]: Abstraction has 5025 states and 13818 transitions. [2021-08-21 11:05:31,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:31,105 INFO L276 IsEmpty]: Start isEmpty. Operand 5025 states and 13818 transitions. [2021-08-21 11:05:31,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:05:31,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:05:31,110 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:05:31,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 11:05:31,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 11:05:31,310 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:05:31,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:05:31,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1235608528, now seen corresponding path program 27 times [2021-08-21 11:05:31,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:05:31,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534267515] [2021-08-21 11:05:31,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:05:31,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:05:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:05:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:31,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:05:31,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534267515] [2021-08-21 11:05:31,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534267515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:31,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083578458] [2021-08-21 11:05:31,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:05:31,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:05:31,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:05:31,418 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:05:31,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 11:05:34,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 11:05:34,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:05:34,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:05:34,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:05:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:34,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083578458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:34,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:05:34,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-21 11:05:34,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615681012] [2021-08-21 11:05:34,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 11:05:34,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:05:34,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 11:05:34,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-08-21 11:05:34,880 INFO L87 Difference]: Start difference. First operand 5025 states and 13818 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 11:05:35,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:05:35,562 INFO L93 Difference]: Finished difference Result 10403 states and 27606 transitions. [2021-08-21 11:05:35,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 11:05:35,562 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 11:05:35,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:05:35,577 INFO L225 Difference]: With dead ends: 10403 [2021-08-21 11:05:35,577 INFO L226 Difference]: Without dead ends: 9842 [2021-08-21 11:05:35,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 637.4ms TimeCoverageRelationStatistics Valid=607, Invalid=1843, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 11:05:35,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9842 states. [2021-08-21 11:05:35,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9842 to 4697. [2021-08-21 11:05:35,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4697 states, 4696 states have (on average 2.74041737649063) internal successors, (12869), 4696 states have internal predecessors, (12869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:35,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 12869 transitions. [2021-08-21 11:05:35,661 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 12869 transitions. Word has length 62 [2021-08-21 11:05:35,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:05:35,662 INFO L470 AbstractCegarLoop]: Abstraction has 4697 states and 12869 transitions. [2021-08-21 11:05:35,662 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 11:05:35,662 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 12869 transitions. [2021-08-21 11:05:35,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:05:35,666 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:05:35,666 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:05:35,689 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 11:05:35,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:05:35,867 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:05:35,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:05:35,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1694874328, now seen corresponding path program 38 times [2021-08-21 11:05:35,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:05:35,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423753628] [2021-08-21 11:05:35,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:05:35,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:05:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:05:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:35,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:05:35,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423753628] [2021-08-21 11:05:35,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423753628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:35,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179479931] [2021-08-21 11:05:35,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:05:35,993 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:05:35,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:05:35,994 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:05:36,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 11:05:39,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:05:39,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:05:39,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:05:39,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:05:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:39,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179479931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:39,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:05:39,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:05:39,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076044132] [2021-08-21 11:05:39,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:05:39,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:05:39,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:05:39,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:05:39,550 INFO L87 Difference]: Start difference. First operand 4697 states and 12869 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:40,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:05:40,100 INFO L93 Difference]: Finished difference Result 9088 states and 23888 transitions. [2021-08-21 11:05:40,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 11:05:40,101 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:05:40,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:05:40,113 INFO L225 Difference]: With dead ends: 9088 [2021-08-21 11:05:40,114 INFO L226 Difference]: Without dead ends: 8936 [2021-08-21 11:05:40,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 524.6ms TimeCoverageRelationStatistics Valid=445, Invalid=1361, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 11:05:40,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8936 states. [2021-08-21 11:05:40,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8936 to 5132. [2021-08-21 11:05:40,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5132 states, 5131 states have (on average 2.7770415123757553) internal successors, (14249), 5131 states have internal predecessors, (14249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:40,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5132 states to 5132 states and 14249 transitions. [2021-08-21 11:05:40,193 INFO L78 Accepts]: Start accepts. Automaton has 5132 states and 14249 transitions. Word has length 62 [2021-08-21 11:05:40,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:05:40,193 INFO L470 AbstractCegarLoop]: Abstraction has 5132 states and 14249 transitions. [2021-08-21 11:05:40,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:40,194 INFO L276 IsEmpty]: Start isEmpty. Operand 5132 states and 14249 transitions. [2021-08-21 11:05:40,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:05:40,199 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:05:40,199 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:05:40,222 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 11:05:40,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-08-21 11:05:40,401 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:05:40,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:05:40,401 INFO L82 PathProgramCache]: Analyzing trace with hash -624949668, now seen corresponding path program 39 times [2021-08-21 11:05:40,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:05:40,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973039326] [2021-08-21 11:05:40,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:05:40,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:05:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:05:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:40,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:05:40,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973039326] [2021-08-21 11:05:40,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973039326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:40,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982978755] [2021-08-21 11:05:40,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:05:40,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:05:40,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:05:40,601 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:05:40,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 11:05:43,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:05:43,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:05:43,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:05:43,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:05:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:44,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982978755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:44,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:05:44,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:05:44,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096569944] [2021-08-21 11:05:44,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:05:44,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:05:44,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:05:44,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:05:44,267 INFO L87 Difference]: Start difference. First operand 5132 states and 14249 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:45,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:05:45,207 INFO L93 Difference]: Finished difference Result 11437 states and 30249 transitions. [2021-08-21 11:05:45,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 11:05:45,208 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:05:45,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:05:45,224 INFO L225 Difference]: With dead ends: 11437 [2021-08-21 11:05:45,224 INFO L226 Difference]: Without dead ends: 10879 [2021-08-21 11:05:45,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 914.9ms TimeCoverageRelationStatistics Valid=795, Invalid=2745, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 11:05:45,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10879 states. [2021-08-21 11:05:45,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10879 to 4897. [2021-08-21 11:05:45,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4897 states, 4896 states have (on average 2.755106209150327) internal successors, (13489), 4896 states have internal predecessors, (13489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:45,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4897 states to 4897 states and 13489 transitions. [2021-08-21 11:05:45,314 INFO L78 Accepts]: Start accepts. Automaton has 4897 states and 13489 transitions. Word has length 62 [2021-08-21 11:05:45,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:05:45,315 INFO L470 AbstractCegarLoop]: Abstraction has 4897 states and 13489 transitions. [2021-08-21 11:05:45,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:45,315 INFO L276 IsEmpty]: Start isEmpty. Operand 4897 states and 13489 transitions. [2021-08-21 11:05:45,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:05:45,319 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:05:45,320 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:05:45,343 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 11:05:45,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:05:45,520 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:05:45,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:05:45,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1742163916, now seen corresponding path program 40 times [2021-08-21 11:05:45,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:05:45,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149734904] [2021-08-21 11:05:45,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:05:45,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:05:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:05:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:45,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:05:45,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149734904] [2021-08-21 11:05:45,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149734904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:45,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138852442] [2021-08-21 11:05:45,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:05:45,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:05:45,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:05:45,683 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:05:45,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 11:05:48,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:05:48,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:05:48,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:05:48,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:05:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:49,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138852442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:49,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:05:49,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:05:49,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415217229] [2021-08-21 11:05:49,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:05:49,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:05:49,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:05:49,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:05:49,269 INFO L87 Difference]: Start difference. First operand 4897 states and 13489 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:49,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:05:49,891 INFO L93 Difference]: Finished difference Result 9601 states and 25307 transitions. [2021-08-21 11:05:49,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 11:05:49,891 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:05:49,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:05:49,904 INFO L225 Difference]: With dead ends: 9601 [2021-08-21 11:05:49,905 INFO L226 Difference]: Without dead ends: 9449 [2021-08-21 11:05:49,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 566.9ms TimeCoverageRelationStatistics Valid=538, Invalid=1718, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 11:05:49,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9449 states. [2021-08-21 11:05:50,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9449 to 5442. [2021-08-21 11:05:50,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5442 states, 5441 states have (on average 2.802609814372358) internal successors, (15249), 5441 states have internal predecessors, (15249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5442 states to 5442 states and 15249 transitions. [2021-08-21 11:05:50,026 INFO L78 Accepts]: Start accepts. Automaton has 5442 states and 15249 transitions. Word has length 62 [2021-08-21 11:05:50,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:05:50,026 INFO L470 AbstractCegarLoop]: Abstraction has 5442 states and 15249 transitions. [2021-08-21 11:05:50,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:50,026 INFO L276 IsEmpty]: Start isEmpty. Operand 5442 states and 15249 transitions. [2021-08-21 11:05:50,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:05:50,034 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:05:50,034 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:05:50,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 11:05:50,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:05:50,265 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:05:50,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:05:50,265 INFO L82 PathProgramCache]: Analyzing trace with hash -577660080, now seen corresponding path program 41 times [2021-08-21 11:05:50,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:05:50,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569973106] [2021-08-21 11:05:50,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:05:50,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:05:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:05:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:50,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:05:50,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569973106] [2021-08-21 11:05:50,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569973106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:50,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011407539] [2021-08-21 11:05:50,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:05:50,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:05:50,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:05:50,380 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:05:50,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 11:05:53,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:05:53,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:05:53,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:05:53,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:05:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:54,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011407539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:54,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:05:54,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:05:54,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741183054] [2021-08-21 11:05:54,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:05:54,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:05:54,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:05:54,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:05:54,020 INFO L87 Difference]: Start difference. First operand 5442 states and 15249 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:55,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:05:55,139 INFO L93 Difference]: Finished difference Result 12336 states and 32753 transitions. [2021-08-21 11:05:55,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 11:05:55,140 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:05:55,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:05:55,156 INFO L225 Difference]: With dead ends: 12336 [2021-08-21 11:05:55,157 INFO L226 Difference]: Without dead ends: 11626 [2021-08-21 11:05:55,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 948.6ms TimeCoverageRelationStatistics Valid=931, Invalid=3491, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 11:05:55,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11626 states. [2021-08-21 11:05:55,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11626 to 5320. [2021-08-21 11:05:55,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5320 states, 5319 states have (on average 2.783605940966347) internal successors, (14806), 5319 states have internal predecessors, (14806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:55,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5320 states to 5320 states and 14806 transitions. [2021-08-21 11:05:55,263 INFO L78 Accepts]: Start accepts. Automaton has 5320 states and 14806 transitions. Word has length 62 [2021-08-21 11:05:55,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:05:55,263 INFO L470 AbstractCegarLoop]: Abstraction has 5320 states and 14806 transitions. [2021-08-21 11:05:55,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:55,263 INFO L276 IsEmpty]: Start isEmpty. Operand 5320 states and 14806 transitions. [2021-08-21 11:05:55,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:05:55,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:05:55,268 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:05:55,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 11:05:55,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-08-21 11:05:55,469 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:05:55,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:05:55,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1129493652, now seen corresponding path program 42 times [2021-08-21 11:05:55,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:05:55,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641485724] [2021-08-21 11:05:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:05:55,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:05:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:05:55,653 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:55,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:05:55,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641485724] [2021-08-21 11:05:55,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641485724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:55,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448920802] [2021-08-21 11:05:55,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:05:55,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:05:55,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:05:55,655 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:05:55,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 11:05:58,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:05:58,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:05:58,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:05:58,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:05:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:59,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448920802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:59,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:05:59,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:05:59,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338534621] [2021-08-21 11:05:59,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:05:59,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:05:59,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:05:59,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:05:59,317 INFO L87 Difference]: Start difference. First operand 5320 states and 14806 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:59,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:05:59,970 INFO L93 Difference]: Finished difference Result 8676 states and 22089 transitions. [2021-08-21 11:05:59,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 11:05:59,971 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:05:59,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:05:59,982 INFO L225 Difference]: With dead ends: 8676 [2021-08-21 11:05:59,982 INFO L226 Difference]: Without dead ends: 8524 [2021-08-21 11:05:59,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 592.2ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 11:05:59,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8524 states. [2021-08-21 11:06:00,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8524 to 5435. [2021-08-21 11:06:00,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5435 states, 5434 states have (on average 2.7789841737210157) internal successors, (15101), 5434 states have internal predecessors, (15101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:00,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5435 states to 5435 states and 15101 transitions. [2021-08-21 11:06:00,058 INFO L78 Accepts]: Start accepts. Automaton has 5435 states and 15101 transitions. Word has length 62 [2021-08-21 11:06:00,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:06:00,058 INFO L470 AbstractCegarLoop]: Abstraction has 5435 states and 15101 transitions. [2021-08-21 11:06:00,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:00,059 INFO L276 IsEmpty]: Start isEmpty. Operand 5435 states and 15101 transitions. [2021-08-21 11:06:00,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:06:00,064 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:06:00,064 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:06:00,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 11:06:00,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:00,265 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:06:00,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:06:00,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1314616806, now seen corresponding path program 43 times [2021-08-21 11:06:00,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:06:00,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970142547] [2021-08-21 11:06:00,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:06:00,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:06:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:06:00,377 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:00,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:06:00,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970142547] [2021-08-21 11:06:00,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970142547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:00,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712227394] [2021-08-21 11:06:00,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:06:00,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:00,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:06:00,378 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:06:00,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 11:06:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:06:03,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:06:03,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:06:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:04,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712227394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:04,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:06:04,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:06:04,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122814274] [2021-08-21 11:06:04,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:06:04,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:06:04,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:06:04,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:06:04,146 INFO L87 Difference]: Start difference. First operand 5435 states and 15101 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:04,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:06:04,931 INFO L93 Difference]: Finished difference Result 9248 states and 24578 transitions. [2021-08-21 11:06:04,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 11:06:04,932 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:06:04,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:06:04,944 INFO L225 Difference]: With dead ends: 9248 [2021-08-21 11:06:04,945 INFO L226 Difference]: Without dead ends: 9096 [2021-08-21 11:06:04,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 724.9ms TimeCoverageRelationStatistics Valid=637, Invalid=2015, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 11:06:04,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9096 states. [2021-08-21 11:06:05,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9096 to 5675. [2021-08-21 11:06:05,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5675 states, 5674 states have (on average 2.7936200211491014) internal successors, (15851), 5674 states have internal predecessors, (15851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:05,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5675 states to 5675 states and 15851 transitions. [2021-08-21 11:06:05,030 INFO L78 Accepts]: Start accepts. Automaton has 5675 states and 15851 transitions. Word has length 62 [2021-08-21 11:06:05,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:06:05,030 INFO L470 AbstractCegarLoop]: Abstraction has 5675 states and 15851 transitions. [2021-08-21 11:06:05,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:05,031 INFO L276 IsEmpty]: Start isEmpty. Operand 5675 states and 15851 transitions. [2021-08-21 11:06:05,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:06:05,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:06:05,036 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:06:05,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 11:06:05,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:05,237 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:06:05,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:06:05,237 INFO L82 PathProgramCache]: Analyzing trace with hash 660526494, now seen corresponding path program 44 times [2021-08-21 11:06:05,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:06:05,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26877287] [2021-08-21 11:06:05,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:06:05,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:06:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:06:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:05,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:06:05,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26877287] [2021-08-21 11:06:05,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26877287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:05,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875949863] [2021-08-21 11:06:05,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:06:05,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:05,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:06:05,366 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:06:05,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 11:06:08,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:06:08,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:06:08,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:06:08,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:06:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:09,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875949863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:09,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:06:09,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:06:09,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99208377] [2021-08-21 11:06:09,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:06:09,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:06:09,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:06:09,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:06:09,266 INFO L87 Difference]: Start difference. First operand 5675 states and 15851 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:10,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:06:10,408 INFO L93 Difference]: Finished difference Result 11568 states and 30923 transitions. [2021-08-21 11:06:10,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 11:06:10,408 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:06:10,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:06:10,425 INFO L225 Difference]: With dead ends: 11568 [2021-08-21 11:06:10,425 INFO L226 Difference]: Without dead ends: 11010 [2021-08-21 11:06:10,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 1022.9ms TimeCoverageRelationStatistics Valid=972, Invalid=3318, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 11:06:10,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11010 states. [2021-08-21 11:06:10,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11010 to 5297. [2021-08-21 11:06:10,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5297 states, 5296 states have (on average 2.7715256797583083) internal successors, (14678), 5296 states have internal predecessors, (14678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:10,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5297 states to 5297 states and 14678 transitions. [2021-08-21 11:06:10,518 INFO L78 Accepts]: Start accepts. Automaton has 5297 states and 14678 transitions. Word has length 62 [2021-08-21 11:06:10,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:06:10,518 INFO L470 AbstractCegarLoop]: Abstraction has 5297 states and 14678 transitions. [2021-08-21 11:06:10,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:10,518 INFO L276 IsEmpty]: Start isEmpty. Operand 5297 states and 14678 transitions. [2021-08-21 11:06:10,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:06:10,523 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:06:10,523 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:06:10,547 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 11:06:10,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:10,723 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:06:10,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:06:10,724 INFO L82 PathProgramCache]: Analyzing trace with hash -251195738, now seen corresponding path program 45 times [2021-08-21 11:06:10,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:06:10,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868841026] [2021-08-21 11:06:10,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:06:10,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:06:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:06:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:10,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:06:10,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868841026] [2021-08-21 11:06:10,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868841026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:10,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454406726] [2021-08-21 11:06:10,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:06:10,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:10,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:06:10,888 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:06:10,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 11:06:14,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:06:14,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:06:14,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:06:14,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:06:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:14,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454406726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:14,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:06:14,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:06:14,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912629353] [2021-08-21 11:06:14,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:06:14,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:06:14,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:06:14,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:06:14,679 INFO L87 Difference]: Start difference. First operand 5297 states and 14678 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:15,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:06:15,404 INFO L93 Difference]: Finished difference Result 9396 states and 24967 transitions. [2021-08-21 11:06:15,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 11:06:15,404 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:06:15,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:06:15,416 INFO L225 Difference]: With dead ends: 9396 [2021-08-21 11:06:15,416 INFO L226 Difference]: Without dead ends: 9244 [2021-08-21 11:06:15,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 648.3ms TimeCoverageRelationStatistics Valid=548, Invalid=1804, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 11:06:15,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9244 states. [2021-08-21 11:06:15,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9244 to 5507. [2021-08-21 11:06:15,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5507 states, 5506 states have (on average 2.7938612422811477) internal successors, (15383), 5506 states have internal predecessors, (15383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5507 states to 5507 states and 15383 transitions. [2021-08-21 11:06:15,496 INFO L78 Accepts]: Start accepts. Automaton has 5507 states and 15383 transitions. Word has length 62 [2021-08-21 11:06:15,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:06:15,496 INFO L470 AbstractCegarLoop]: Abstraction has 5507 states and 15383 transitions. [2021-08-21 11:06:15,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:15,496 INFO L276 IsEmpty]: Start isEmpty. Operand 5507 states and 15383 transitions. [2021-08-21 11:06:15,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:06:15,501 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:06:15,501 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:06:15,526 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 11:06:15,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-21 11:06:15,705 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:06:15,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:06:15,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1723947562, now seen corresponding path program 46 times [2021-08-21 11:06:15,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:06:15,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882051492] [2021-08-21 11:06:15,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:06:15,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:06:15,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:06:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:15,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:06:15,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882051492] [2021-08-21 11:06:15,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882051492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:15,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538520061] [2021-08-21 11:06:15,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:06:15,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:15,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:06:15,821 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:06:15,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 11:06:19,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:06:19,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:06:19,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:06:19,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:06:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:19,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538520061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:19,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:06:19,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:06:19,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525362685] [2021-08-21 11:06:19,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:06:19,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:06:19,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:06:19,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:06:19,749 INFO L87 Difference]: Start difference. First operand 5507 states and 15383 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:20,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:06:20,814 INFO L93 Difference]: Finished difference Result 11460 states and 30650 transitions. [2021-08-21 11:06:20,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 11:06:20,814 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:06:20,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:06:20,831 INFO L225 Difference]: With dead ends: 11460 [2021-08-21 11:06:20,831 INFO L226 Difference]: Without dead ends: 10902 [2021-08-21 11:06:20,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 1005.8ms TimeCoverageRelationStatistics Valid=861, Invalid=3171, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 11:06:20,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10902 states. [2021-08-21 11:06:20,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10902 to 5132. [2021-08-21 11:06:20,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5132 states, 5131 states have (on average 2.7635938413564607) internal successors, (14180), 5131 states have internal predecessors, (14180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:20,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5132 states to 5132 states and 14180 transitions. [2021-08-21 11:06:20,929 INFO L78 Accepts]: Start accepts. Automaton has 5132 states and 14180 transitions. Word has length 62 [2021-08-21 11:06:20,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:06:20,929 INFO L470 AbstractCegarLoop]: Abstraction has 5132 states and 14180 transitions. [2021-08-21 11:06:20,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:20,929 INFO L276 IsEmpty]: Start isEmpty. Operand 5132 states and 14180 transitions. [2021-08-21 11:06:20,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:06:20,934 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:06:20,934 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:06:20,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-21 11:06:21,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:21,135 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:06:21,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:06:21,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1388268712, now seen corresponding path program 47 times [2021-08-21 11:06:21,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:06:21,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258533276] [2021-08-21 11:06:21,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:06:21,135 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:06:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:06:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:21,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:06:21,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258533276] [2021-08-21 11:06:21,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258533276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:21,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125143229] [2021-08-21 11:06:21,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:06:21,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:21,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:06:21,259 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:06:21,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 11:06:24,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:06:24,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:06:24,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:06:24,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:06:25,164 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:25,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125143229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:25,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:06:25,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:06:25,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403751480] [2021-08-21 11:06:25,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:06:25,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:06:25,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:06:25,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:06:25,165 INFO L87 Difference]: Start difference. First operand 5132 states and 14180 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:25,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:06:25,890 INFO L93 Difference]: Finished difference Result 9751 states and 25877 transitions. [2021-08-21 11:06:25,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 11:06:25,891 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:06:25,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:06:25,905 INFO L225 Difference]: With dead ends: 9751 [2021-08-21 11:06:25,905 INFO L226 Difference]: Without dead ends: 9599 [2021-08-21 11:06:25,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 673.9ms TimeCoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 11:06:25,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9599 states. [2021-08-21 11:06:25,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9599 to 5512. [2021-08-21 11:06:25,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5512 states, 5511 states have (on average 2.7857013246234805) internal successors, (15352), 5511 states have internal predecessors, (15352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5512 states to 5512 states and 15352 transitions. [2021-08-21 11:06:25,995 INFO L78 Accepts]: Start accepts. Automaton has 5512 states and 15352 transitions. Word has length 62 [2021-08-21 11:06:25,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:06:25,996 INFO L470 AbstractCegarLoop]: Abstraction has 5512 states and 15352 transitions. [2021-08-21 11:06:25,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:25,996 INFO L276 IsEmpty]: Start isEmpty. Operand 5512 states and 15352 transitions. [2021-08-21 11:06:26,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:06:26,001 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:06:26,001 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:06:26,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-21 11:06:26,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:26,202 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:06:26,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:06:26,202 INFO L82 PathProgramCache]: Analyzing trace with hash 586874588, now seen corresponding path program 48 times [2021-08-21 11:06:26,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:06:26,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214558355] [2021-08-21 11:06:26,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:06:26,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:06:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:06:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:26,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:06:26,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214558355] [2021-08-21 11:06:26,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214558355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:26,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682561241] [2021-08-21 11:06:26,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:06:26,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:26,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:06:26,323 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:06:26,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 11:06:29,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 11:06:29,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:06:29,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:06:29,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:06:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:30,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682561241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:30,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:06:30,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:06:30,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271451516] [2021-08-21 11:06:30,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:06:30,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:06:30,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:06:30,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:06:30,292 INFO L87 Difference]: Start difference. First operand 5512 states and 15352 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:31,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:06:31,348 INFO L93 Difference]: Finished difference Result 12235 states and 32630 transitions. [2021-08-21 11:06:31,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 11:06:31,348 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:06:31,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:06:31,365 INFO L225 Difference]: With dead ends: 12235 [2021-08-21 11:06:31,365 INFO L226 Difference]: Without dead ends: 11629 [2021-08-21 11:06:31,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 928.2ms TimeCoverageRelationStatistics Valid=887, Invalid=3273, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 11:06:31,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11629 states. [2021-08-21 11:06:31,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11629 to 5459. [2021-08-21 11:06:31,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5459 states, 5458 states have (on average 2.7563209967020885) internal successors, (15044), 5458 states have internal predecessors, (15044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:31,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5459 states to 5459 states and 15044 transitions. [2021-08-21 11:06:31,462 INFO L78 Accepts]: Start accepts. Automaton has 5459 states and 15044 transitions. Word has length 62 [2021-08-21 11:06:31,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:06:31,462 INFO L470 AbstractCegarLoop]: Abstraction has 5459 states and 15044 transitions. [2021-08-21 11:06:31,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:31,462 INFO L276 IsEmpty]: Start isEmpty. Operand 5459 states and 15044 transitions. [2021-08-21 11:06:31,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:06:31,467 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:06:31,467 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:06:31,491 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 11:06:31,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-08-21 11:06:31,667 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:06:31,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:06:31,668 INFO L82 PathProgramCache]: Analyzing trace with hash -2000938976, now seen corresponding path program 49 times [2021-08-21 11:06:31,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:06:31,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608995185] [2021-08-21 11:06:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:06:31,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:06:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:06:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:31,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:06:31,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608995185] [2021-08-21 11:06:31,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608995185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:31,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467041017] [2021-08-21 11:06:31,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:06:31,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:31,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:06:31,785 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:06:31,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 11:06:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:06:35,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:06:35,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:06:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:35,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467041017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:35,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:06:35,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:06:35,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503876673] [2021-08-21 11:06:35,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:06:35,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:06:35,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:06:35,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:06:35,767 INFO L87 Difference]: Start difference. First operand 5459 states and 15044 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:36,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:06:36,398 INFO L93 Difference]: Finished difference Result 9079 states and 23124 transitions. [2021-08-21 11:06:36,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 11:06:36,398 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:06:36,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:06:36,410 INFO L225 Difference]: With dead ends: 9079 [2021-08-21 11:06:36,410 INFO L226 Difference]: Without dead ends: 8927 [2021-08-21 11:06:36,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 589.5ms TimeCoverageRelationStatistics Valid=530, Invalid=1822, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 11:06:36,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8927 states. [2021-08-21 11:06:36,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8927 to 5629. [2021-08-21 11:06:36,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5629 states, 5628 states have (on average 2.7592395167022032) internal successors, (15529), 5628 states have internal predecessors, (15529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:36,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5629 states to 5629 states and 15529 transitions. [2021-08-21 11:06:36,489 INFO L78 Accepts]: Start accepts. Automaton has 5629 states and 15529 transitions. Word has length 62 [2021-08-21 11:06:36,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:06:36,489 INFO L470 AbstractCegarLoop]: Abstraction has 5629 states and 15529 transitions. [2021-08-21 11:06:36,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:36,489 INFO L276 IsEmpty]: Start isEmpty. Operand 5629 states and 15529 transitions. [2021-08-21 11:06:36,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:06:36,494 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:06:36,494 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:06:36,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-21 11:06:36,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:36,696 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:06:36,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:06:36,696 INFO L82 PathProgramCache]: Analyzing trace with hash -150082138, now seen corresponding path program 50 times [2021-08-21 11:06:36,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:06:36,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766242317] [2021-08-21 11:06:36,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:06:36,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:06:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:06:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:36,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:06:36,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766242317] [2021-08-21 11:06:36,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766242317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:36,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56422492] [2021-08-21 11:06:36,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:06:36,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:36,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:06:36,813 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:06:36,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 11:06:40,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:06:40,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:06:40,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:06:40,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:06:40,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:40,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56422492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:40,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:06:40,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:06:40,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455017332] [2021-08-21 11:06:40,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:06:40,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:06:40,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:06:40,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:06:40,829 INFO L87 Difference]: Start difference. First operand 5629 states and 15529 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:41,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:06:41,720 INFO L93 Difference]: Finished difference Result 10333 states and 27432 transitions. [2021-08-21 11:06:41,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 11:06:41,720 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:06:41,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:06:41,734 INFO L225 Difference]: With dead ends: 10333 [2021-08-21 11:06:41,734 INFO L226 Difference]: Without dead ends: 10181 [2021-08-21 11:06:41,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 815.8ms TimeCoverageRelationStatistics Valid=855, Invalid=2805, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 11:06:41,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10181 states. [2021-08-21 11:06:41,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10181 to 6019. [2021-08-21 11:06:41,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6019 states, 6018 states have (on average 2.7897972748421402) internal successors, (16789), 6018 states have internal predecessors, (16789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:41,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6019 states to 6019 states and 16789 transitions. [2021-08-21 11:06:41,828 INFO L78 Accepts]: Start accepts. Automaton has 6019 states and 16789 transitions. Word has length 62 [2021-08-21 11:06:41,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:06:41,829 INFO L470 AbstractCegarLoop]: Abstraction has 6019 states and 16789 transitions. [2021-08-21 11:06:41,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:41,829 INFO L276 IsEmpty]: Start isEmpty. Operand 6019 states and 16789 transitions. [2021-08-21 11:06:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:06:41,836 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:06:41,836 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:06:41,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-21 11:06:42,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:42,037 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:06:42,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:06:42,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1825061162, now seen corresponding path program 51 times [2021-08-21 11:06:42,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:06:42,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292599559] [2021-08-21 11:06:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:06:42,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:06:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:06:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:42,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:06:42,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292599559] [2021-08-21 11:06:42,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292599559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:42,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273185338] [2021-08-21 11:06:42,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:06:42,214 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:42,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:06:42,214 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:06:42,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 11:06:45,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:06:45,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:06:45,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:06:45,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:06:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:46,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273185338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:46,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:06:46,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:06:46,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567291527] [2021-08-21 11:06:46,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:06:46,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:06:46,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:06:46,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:06:46,253 INFO L87 Difference]: Start difference. First operand 6019 states and 16789 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:47,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:06:47,453 INFO L93 Difference]: Finished difference Result 12203 states and 32592 transitions. [2021-08-21 11:06:47,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 11:06:47,454 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:06:47,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:06:47,470 INFO L225 Difference]: With dead ends: 12203 [2021-08-21 11:06:47,471 INFO L226 Difference]: Without dead ends: 11645 [2021-08-21 11:06:47,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1916 ImplicationChecksByTransitivity, 1057.0ms TimeCoverageRelationStatistics Valid=1206, Invalid=4344, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 11:06:47,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11645 states. [2021-08-21 11:06:47,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11645 to 5559. [2021-08-21 11:06:47,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5559 states, 5558 states have (on average 2.7625044980208706) internal successors, (15354), 5558 states have internal predecessors, (15354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:47,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5559 states to 5559 states and 15354 transitions. [2021-08-21 11:06:47,571 INFO L78 Accepts]: Start accepts. Automaton has 5559 states and 15354 transitions. Word has length 62 [2021-08-21 11:06:47,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:06:47,571 INFO L470 AbstractCegarLoop]: Abstraction has 5559 states and 15354 transitions. [2021-08-21 11:06:47,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:47,571 INFO L276 IsEmpty]: Start isEmpty. Operand 5559 states and 15354 transitions. [2021-08-21 11:06:47,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:06:47,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:06:47,577 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:06:47,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-21 11:06:47,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:47,777 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:06:47,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:06:47,778 INFO L82 PathProgramCache]: Analyzing trace with hash -104744502, now seen corresponding path program 52 times [2021-08-21 11:06:47,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:06:47,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841845753] [2021-08-21 11:06:47,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:06:47,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:06:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:06:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:47,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:06:47,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841845753] [2021-08-21 11:06:47,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841845753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:47,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486983507] [2021-08-21 11:06:47,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:06:47,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:47,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:06:47,945 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:06:47,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 11:06:51,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:06:51,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:06:51,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:06:51,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:06:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:52,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486983507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:52,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:06:52,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:06:52,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691109100] [2021-08-21 11:06:52,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:06:52,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:06:52,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:06:52,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:06:52,062 INFO L87 Difference]: Start difference. First operand 5559 states and 15354 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:52,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:06:52,982 INFO L93 Difference]: Finished difference Result 10535 states and 27914 transitions. [2021-08-21 11:06:52,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 11:06:52,982 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:06:52,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:06:52,997 INFO L225 Difference]: With dead ends: 10535 [2021-08-21 11:06:52,997 INFO L226 Difference]: Without dead ends: 10383 [2021-08-21 11:06:52,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 843.2ms TimeCoverageRelationStatistics Valid=782, Invalid=2524, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 11:06:53,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10383 states. [2021-08-21 11:06:53,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10383 to 5729. [2021-08-21 11:06:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5729 states, 5728 states have (on average 2.7809008379888267) internal successors, (15929), 5728 states have internal predecessors, (15929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5729 states to 5729 states and 15929 transitions. [2021-08-21 11:06:53,133 INFO L78 Accepts]: Start accepts. Automaton has 5729 states and 15929 transitions. Word has length 62 [2021-08-21 11:06:53,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:06:53,133 INFO L470 AbstractCegarLoop]: Abstraction has 5729 states and 15929 transitions. [2021-08-21 11:06:53,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:53,133 INFO L276 IsEmpty]: Start isEmpty. Operand 5729 states and 15929 transitions. [2021-08-21 11:06:53,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:06:53,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:06:53,140 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:06:53,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-21 11:06:53,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-08-21 11:06:53,340 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:06:53,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:06:53,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1870398798, now seen corresponding path program 53 times [2021-08-21 11:06:53,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:06:53,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256621078] [2021-08-21 11:06:53,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:06:53,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:06:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:06:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:53,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:06:53,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256621078] [2021-08-21 11:06:53,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256621078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:53,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334345374] [2021-08-21 11:06:53,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:06:53,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:53,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:06:53,490 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:06:53,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 11:06:57,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:06:57,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:06:57,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:06:57,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:06:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:57,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334345374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:57,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:06:57,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:06:57,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066065419] [2021-08-21 11:06:57,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:06:57,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:06:57,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:06:57,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:06:57,746 INFO L87 Difference]: Start difference. First operand 5729 states and 15929 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:59,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:06:59,168 INFO L93 Difference]: Finished difference Result 12790 states and 34094 transitions. [2021-08-21 11:06:59,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-21 11:06:59,169 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:06:59,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:06:59,183 INFO L225 Difference]: With dead ends: 12790 [2021-08-21 11:06:59,183 INFO L226 Difference]: Without dead ends: 12232 [2021-08-21 11:06:59,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1827 ImplicationChecksByTransitivity, 1297.1ms TimeCoverageRelationStatistics Valid=1196, Invalid=4206, Unknown=0, NotChecked=0, Total=5402 [2021-08-21 11:06:59,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12232 states. [2021-08-21 11:06:59,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12232 to 5629. [2021-08-21 11:06:59,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5629 states, 5628 states have (on average 2.763503909026297) internal successors, (15553), 5628 states have internal predecessors, (15553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:59,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5629 states to 5629 states and 15553 transitions. [2021-08-21 11:06:59,271 INFO L78 Accepts]: Start accepts. Automaton has 5629 states and 15553 transitions. Word has length 62 [2021-08-21 11:06:59,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:06:59,271 INFO L470 AbstractCegarLoop]: Abstraction has 5629 states and 15553 transitions. [2021-08-21 11:06:59,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:59,271 INFO L276 IsEmpty]: Start isEmpty. Operand 5629 states and 15553 transitions. [2021-08-21 11:06:59,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:06:59,276 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:06:59,276 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:06:59,301 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 11:06:59,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-08-21 11:06:59,476 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:06:59,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:06:59,477 INFO L82 PathProgramCache]: Analyzing trace with hash -855103656, now seen corresponding path program 54 times [2021-08-21 11:06:59,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:06:59,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640297101] [2021-08-21 11:06:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:06:59,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:06:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:06:59,637 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:59,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:06:59,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640297101] [2021-08-21 11:06:59,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640297101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:59,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672798636] [2021-08-21 11:06:59,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:06:59,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:59,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:06:59,639 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:06:59,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 11:07:03,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 11:07:03,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:07:03,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:07:03,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:07:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:03,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672798636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:03,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:07:03,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:07:03,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413816858] [2021-08-21 11:07:03,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:07:03,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:07:03,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:07:03,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:07:03,866 INFO L87 Difference]: Start difference. First operand 5629 states and 15553 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:05,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:07:05,171 INFO L93 Difference]: Finished difference Result 12800 states and 33970 transitions. [2021-08-21 11:07:05,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-21 11:07:05,171 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:07:05,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:07:05,185 INFO L225 Difference]: With dead ends: 12800 [2021-08-21 11:07:05,185 INFO L226 Difference]: Without dead ends: 11948 [2021-08-21 11:07:05,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1786 ImplicationChecksByTransitivity, 1180.3ms TimeCoverageRelationStatistics Valid=1140, Invalid=4262, Unknown=0, NotChecked=0, Total=5402 [2021-08-21 11:07:05,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11948 states. [2021-08-21 11:07:05,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11948 to 5556. [2021-08-21 11:07:05,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5556 states, 5555 states have (on average 2.7963996399639965) internal successors, (15534), 5555 states have internal predecessors, (15534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5556 states to 5556 states and 15534 transitions. [2021-08-21 11:07:05,286 INFO L78 Accepts]: Start accepts. Automaton has 5556 states and 15534 transitions. Word has length 62 [2021-08-21 11:07:05,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:07:05,286 INFO L470 AbstractCegarLoop]: Abstraction has 5556 states and 15534 transitions. [2021-08-21 11:07:05,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:05,286 INFO L276 IsEmpty]: Start isEmpty. Operand 5556 states and 15534 transitions. [2021-08-21 11:07:05,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:07:05,291 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:07:05,291 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:07:05,317 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 11:07:05,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-21 11:07:05,492 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:07:05,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:07:05,492 INFO L82 PathProgramCache]: Analyzing trace with hash 159291980, now seen corresponding path program 55 times [2021-08-21 11:07:05,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:07:05,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644345401] [2021-08-21 11:07:05,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:07:05,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:07:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:05,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:07:05,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644345401] [2021-08-21 11:07:05,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644345401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:05,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054546841] [2021-08-21 11:07:05,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:07:05,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:05,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:07:05,673 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:07:05,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 11:07:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:09,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:07:09,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:07:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:10,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054546841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:10,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:07:10,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:07:10,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801247183] [2021-08-21 11:07:10,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:07:10,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:07:10,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:07:10,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:07:10,133 INFO L87 Difference]: Start difference. First operand 5556 states and 15534 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:11,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:07:11,363 INFO L93 Difference]: Finished difference Result 11814 states and 31740 transitions. [2021-08-21 11:07:11,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 11:07:11,363 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 11:07:11,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:07:11,378 INFO L225 Difference]: With dead ends: 11814 [2021-08-21 11:07:11,378 INFO L226 Difference]: Without dead ends: 11256 [2021-08-21 11:07:11,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 1129.7ms TimeCoverageRelationStatistics Valid=961, Invalid=3461, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 11:07:11,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11256 states. [2021-08-21 11:07:11,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11256 to 5551. [2021-08-21 11:07:11,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5551 states, 5550 states have (on average 2.8055855855855856) internal successors, (15571), 5550 states have internal predecessors, (15571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5551 states to 5551 states and 15571 transitions. [2021-08-21 11:07:11,470 INFO L78 Accepts]: Start accepts. Automaton has 5551 states and 15571 transitions. Word has length 62 [2021-08-21 11:07:11,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:07:11,470 INFO L470 AbstractCegarLoop]: Abstraction has 5551 states and 15571 transitions. [2021-08-21 11:07:11,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:11,470 INFO L276 IsEmpty]: Start isEmpty. Operand 5551 states and 15571 transitions. [2021-08-21 11:07:11,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:07:11,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:07:11,476 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:07:11,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 11:07:11,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-08-21 11:07:11,676 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:07:11,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:07:11,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1480625243, now seen corresponding path program 56 times [2021-08-21 11:07:11,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:07:11,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796524135] [2021-08-21 11:07:11,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:07:11,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:07:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:11,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:07:11,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796524135] [2021-08-21 11:07:11,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796524135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:11,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683662124] [2021-08-21 11:07:11,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:07:11,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:11,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:07:11,822 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:07:11,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 11:07:15,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:07:15,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:07:15,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:07:15,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:07:16,373 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:16,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683662124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:16,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:07:16,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:07:16,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246598844] [2021-08-21 11:07:16,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:07:16,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:07:16,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:07:16,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:07:16,375 INFO L87 Difference]: Start difference. First operand 5551 states and 15571 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:16,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:07:16,715 INFO L93 Difference]: Finished difference Result 8096 states and 21341 transitions. [2021-08-21 11:07:16,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 11:07:16,716 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:07:16,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:07:16,729 INFO L225 Difference]: With dead ends: 8096 [2021-08-21 11:07:16,729 INFO L226 Difference]: Without dead ends: 7944 [2021-08-21 11:07:16,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 390.9ms TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 11:07:16,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7944 states. [2021-08-21 11:07:16,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7944 to 5641. [2021-08-21 11:07:16,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5641 states, 5640 states have (on average 2.795921985815603) internal successors, (15769), 5640 states have internal predecessors, (15769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:16,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5641 states to 5641 states and 15769 transitions. [2021-08-21 11:07:16,815 INFO L78 Accepts]: Start accepts. Automaton has 5641 states and 15769 transitions. Word has length 67 [2021-08-21 11:07:16,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:07:16,815 INFO L470 AbstractCegarLoop]: Abstraction has 5641 states and 15769 transitions. [2021-08-21 11:07:16,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:16,815 INFO L276 IsEmpty]: Start isEmpty. Operand 5641 states and 15769 transitions. [2021-08-21 11:07:16,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:07:16,821 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:07:16,821 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:07:16,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-21 11:07:17,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:17,021 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:07:17,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:07:17,022 INFO L82 PathProgramCache]: Analyzing trace with hash 44920881, now seen corresponding path program 57 times [2021-08-21 11:07:17,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:07:17,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434128574] [2021-08-21 11:07:17,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:07:17,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:07:17,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:17,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:07:17,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434128574] [2021-08-21 11:07:17,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434128574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:17,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111178436] [2021-08-21 11:07:17,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:07:17,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:17,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:07:17,166 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:07:17,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 11:07:21,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:07:21,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:07:21,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:07:21,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:07:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:21,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111178436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:21,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:07:21,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:07:21,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752597612] [2021-08-21 11:07:21,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:07:21,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:07:21,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:07:21,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:07:21,733 INFO L87 Difference]: Start difference. First operand 5641 states and 15769 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:22,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:07:22,118 INFO L93 Difference]: Finished difference Result 8152 states and 21461 transitions. [2021-08-21 11:07:22,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 11:07:22,118 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:07:22,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:07:22,130 INFO L225 Difference]: With dead ends: 8152 [2021-08-21 11:07:22,130 INFO L226 Difference]: Without dead ends: 8000 [2021-08-21 11:07:22,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 428.1ms TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 11:07:22,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8000 states. [2021-08-21 11:07:22,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8000 to 5716. [2021-08-21 11:07:22,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5716 states, 5715 states have (on average 2.7881014873140857) internal successors, (15934), 5715 states have internal predecessors, (15934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:22,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5716 states to 5716 states and 15934 transitions. [2021-08-21 11:07:22,214 INFO L78 Accepts]: Start accepts. Automaton has 5716 states and 15934 transitions. Word has length 67 [2021-08-21 11:07:22,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:07:22,214 INFO L470 AbstractCegarLoop]: Abstraction has 5716 states and 15934 transitions. [2021-08-21 11:07:22,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:22,215 INFO L276 IsEmpty]: Start isEmpty. Operand 5716 states and 15934 transitions. [2021-08-21 11:07:22,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:07:22,221 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:07:22,221 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:07:22,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 11:07:22,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:22,422 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:07:22,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:07:22,422 INFO L82 PathProgramCache]: Analyzing trace with hash -330779613, now seen corresponding path program 58 times [2021-08-21 11:07:22,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:07:22,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468519051] [2021-08-21 11:07:22,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:07:22,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:07:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:22,560 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:22,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:07:22,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468519051] [2021-08-21 11:07:22,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468519051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:22,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346095482] [2021-08-21 11:07:22,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:07:22,560 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:22,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:07:22,561 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:07:22,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 11:07:26,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:07:26,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:07:26,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:07:26,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:07:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:27,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346095482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:27,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:07:27,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:07:27,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099982201] [2021-08-21 11:07:27,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:07:27,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:07:27,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:07:27,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:07:27,169 INFO L87 Difference]: Start difference. First operand 5716 states and 15934 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:27,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:07:27,622 INFO L93 Difference]: Finished difference Result 8282 states and 21731 transitions. [2021-08-21 11:07:27,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 11:07:27,622 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:07:27,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:07:27,634 INFO L225 Difference]: With dead ends: 8282 [2021-08-21 11:07:27,634 INFO L226 Difference]: Without dead ends: 8130 [2021-08-21 11:07:27,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 490.8ms TimeCoverageRelationStatistics Valid=384, Invalid=1022, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 11:07:27,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8130 states. [2021-08-21 11:07:27,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8130 to 5716. [2021-08-21 11:07:27,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5716 states, 5715 states have (on average 2.7881014873140857) internal successors, (15934), 5715 states have internal predecessors, (15934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:27,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5716 states to 5716 states and 15934 transitions. [2021-08-21 11:07:27,720 INFO L78 Accepts]: Start accepts. Automaton has 5716 states and 15934 transitions. Word has length 67 [2021-08-21 11:07:27,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:07:27,720 INFO L470 AbstractCegarLoop]: Abstraction has 5716 states and 15934 transitions. [2021-08-21 11:07:27,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:27,721 INFO L276 IsEmpty]: Start isEmpty. Operand 5716 states and 15934 transitions. [2021-08-21 11:07:27,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:07:27,726 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:07:27,726 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:07:27,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-21 11:07:27,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:27,927 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:07:27,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:07:27,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1820496361, now seen corresponding path program 59 times [2021-08-21 11:07:27,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:07:27,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163709863] [2021-08-21 11:07:27,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:07:27,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:07:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:28,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:07:28,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163709863] [2021-08-21 11:07:28,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163709863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:28,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064420679] [2021-08-21 11:07:28,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:07:28,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:28,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:07:28,108 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:07:28,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 11:07:32,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:07:32,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:07:32,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:07:32,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:07:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:32,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064420679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:32,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:07:32,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:07:32,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729722927] [2021-08-21 11:07:32,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:07:32,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:07:32,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:07:32,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:07:32,741 INFO L87 Difference]: Start difference. First operand 5716 states and 15934 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:33,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:07:33,173 INFO L93 Difference]: Finished difference Result 8206 states and 21591 transitions. [2021-08-21 11:07:33,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 11:07:33,174 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 11:07:33,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:07:33,185 INFO L225 Difference]: With dead ends: 8206 [2021-08-21 11:07:33,185 INFO L226 Difference]: Without dead ends: 8054 [2021-08-21 11:07:33,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 461.6ms TimeCoverageRelationStatistics Valid=337, Invalid=923, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 11:07:33,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8054 states. [2021-08-21 11:07:33,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8054 to 5716. [2021-08-21 11:07:33,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5716 states, 5715 states have (on average 2.7881014873140857) internal successors, (15934), 5715 states have internal predecessors, (15934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:33,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5716 states to 5716 states and 15934 transitions. [2021-08-21 11:07:33,261 INFO L78 Accepts]: Start accepts. Automaton has 5716 states and 15934 transitions. Word has length 67 [2021-08-21 11:07:33,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:07:33,262 INFO L470 AbstractCegarLoop]: Abstraction has 5716 states and 15934 transitions. [2021-08-21 11:07:33,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:33,262 INFO L276 IsEmpty]: Start isEmpty. Operand 5716 states and 15934 transitions. [2021-08-21 11:07:33,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:07:33,267 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:07:33,267 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:07:33,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-21 11:07:33,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:33,468 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:07:33,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:07:33,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1745054501, now seen corresponding path program 60 times [2021-08-21 11:07:33,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:07:33,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007146733] [2021-08-21 11:07:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:07:33,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:07:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:33,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:07:33,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007146733] [2021-08-21 11:07:33,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007146733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:33,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489313009] [2021-08-21 11:07:33,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:07:33,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:33,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:07:33,617 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:07:33,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 11:07:37,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:07:37,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:07:37,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:07:37,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:07:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:38,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489313009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:38,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:07:38,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:07:38,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612477228] [2021-08-21 11:07:38,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:07:38,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:07:38,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:07:38,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:07:38,237 INFO L87 Difference]: Start difference. First operand 5716 states and 15934 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:38,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:07:38,662 INFO L93 Difference]: Finished difference Result 8225 states and 21604 transitions. [2021-08-21 11:07:38,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 11:07:38,663 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:07:38,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:07:38,674 INFO L225 Difference]: With dead ends: 8225 [2021-08-21 11:07:38,674 INFO L226 Difference]: Without dead ends: 8073 [2021-08-21 11:07:38,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 462.8ms TimeCoverageRelationStatistics Valid=417, Invalid=1223, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 11:07:38,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8073 states. [2021-08-21 11:07:38,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8073 to 5841. [2021-08-21 11:07:38,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5841 states, 5840 states have (on average 2.775513698630137) internal successors, (16209), 5840 states have internal predecessors, (16209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:38,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5841 states to 5841 states and 16209 transitions. [2021-08-21 11:07:38,750 INFO L78 Accepts]: Start accepts. Automaton has 5841 states and 16209 transitions. Word has length 67 [2021-08-21 11:07:38,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:07:38,750 INFO L470 AbstractCegarLoop]: Abstraction has 5841 states and 16209 transitions. [2021-08-21 11:07:38,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:38,750 INFO L276 IsEmpty]: Start isEmpty. Operand 5841 states and 16209 transitions. [2021-08-21 11:07:38,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:07:38,755 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:07:38,756 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:07:38,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-21 11:07:38,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:38,956 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:07:38,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:07:38,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1369354007, now seen corresponding path program 61 times [2021-08-21 11:07:38,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:07:38,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731674757] [2021-08-21 11:07:38,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:07:38,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:07:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:39,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:07:39,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731674757] [2021-08-21 11:07:39,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731674757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:39,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761089720] [2021-08-21 11:07:39,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:07:39,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:39,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:07:39,091 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:07:39,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 11:07:43,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:43,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:07:43,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:07:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:43,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761089720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:43,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:07:43,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:07:43,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644492036] [2021-08-21 11:07:43,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:07:43,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:07:43,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:07:43,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:07:43,782 INFO L87 Difference]: Start difference. First operand 5841 states and 16209 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:44,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:07:44,247 INFO L93 Difference]: Finished difference Result 8466 states and 22099 transitions. [2021-08-21 11:07:44,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 11:07:44,248 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:07:44,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:07:44,259 INFO L225 Difference]: With dead ends: 8466 [2021-08-21 11:07:44,259 INFO L226 Difference]: Without dead ends: 8314 [2021-08-21 11:07:44,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 472.3ms TimeCoverageRelationStatistics Valid=453, Invalid=1269, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 11:07:44,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8314 states. [2021-08-21 11:07:44,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8314 to 5891. [2021-08-21 11:07:44,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5891 states, 5890 states have (on average 2.7706281833616297) internal successors, (16319), 5890 states have internal predecessors, (16319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:44,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5891 states to 5891 states and 16319 transitions. [2021-08-21 11:07:44,337 INFO L78 Accepts]: Start accepts. Automaton has 5891 states and 16319 transitions. Word has length 67 [2021-08-21 11:07:44,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:07:44,337 INFO L470 AbstractCegarLoop]: Abstraction has 5891 states and 16319 transitions. [2021-08-21 11:07:44,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:44,337 INFO L276 IsEmpty]: Start isEmpty. Operand 5891 states and 16319 transitions. [2021-08-21 11:07:44,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:07:44,342 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:07:44,343 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:07:44,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-21 11:07:44,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-08-21 11:07:44,543 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:07:44,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:07:44,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1780185629, now seen corresponding path program 28 times [2021-08-21 11:07:44,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:07:44,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980790701] [2021-08-21 11:07:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:07:44,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:07:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:44,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:07:44,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980790701] [2021-08-21 11:07:44,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980790701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:44,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211601843] [2021-08-21 11:07:44,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:07:44,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:44,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:07:44,700 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:07:44,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 11:07:48,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:07:48,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:07:48,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:07:48,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:07:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:49,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211601843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:49,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:07:49,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:07:49,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787385308] [2021-08-21 11:07:49,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:07:49,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:07:49,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:07:49,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:07:49,468 INFO L87 Difference]: Start difference. First operand 5891 states and 16319 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:49,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:07:49,956 INFO L93 Difference]: Finished difference Result 8412 states and 22057 transitions. [2021-08-21 11:07:49,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 11:07:49,956 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:07:49,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:07:49,968 INFO L225 Difference]: With dead ends: 8412 [2021-08-21 11:07:49,968 INFO L226 Difference]: Without dead ends: 8108 [2021-08-21 11:07:49,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 524.4ms TimeCoverageRelationStatistics Valid=462, Invalid=1344, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 11:07:49,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8108 states. [2021-08-21 11:07:50,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8108 to 5971. [2021-08-21 11:07:50,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5971 states, 5970 states have (on average 2.761139028475712) internal successors, (16484), 5970 states have internal predecessors, (16484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5971 states to 5971 states and 16484 transitions. [2021-08-21 11:07:50,057 INFO L78 Accepts]: Start accepts. Automaton has 5971 states and 16484 transitions. Word has length 67 [2021-08-21 11:07:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:07:50,057 INFO L470 AbstractCegarLoop]: Abstraction has 5971 states and 16484 transitions. [2021-08-21 11:07:50,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 5971 states and 16484 transitions. [2021-08-21 11:07:50,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:07:50,063 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:07:50,063 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:07:50,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-21 11:07:50,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-08-21 11:07:50,264 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:07:50,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:07:50,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1126444287, now seen corresponding path program 62 times [2021-08-21 11:07:50,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:07:50,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521065983] [2021-08-21 11:07:50,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:07:50,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:07:50,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:50,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:07:50,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521065983] [2021-08-21 11:07:50,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521065983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:50,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699627391] [2021-08-21 11:07:50,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:07:50,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:50,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:07:50,399 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:07:50,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 11:07:54,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:07:54,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:07:54,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:07:54,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:07:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:55,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699627391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:55,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:07:55,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:07:55,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196325918] [2021-08-21 11:07:55,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:07:55,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:07:55,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:07:55,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:07:55,297 INFO L87 Difference]: Start difference. First operand 5971 states and 16484 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:55,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:07:55,740 INFO L93 Difference]: Finished difference Result 8345 states and 21884 transitions. [2021-08-21 11:07:55,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 11:07:55,740 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:07:55,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:07:55,752 INFO L225 Difference]: With dead ends: 8345 [2021-08-21 11:07:55,752 INFO L226 Difference]: Without dead ends: 8193 [2021-08-21 11:07:55,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 474.1ms TimeCoverageRelationStatistics Valid=376, Invalid=1106, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 11:07:55,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8193 states. [2021-08-21 11:07:55,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8193 to 5971. [2021-08-21 11:07:55,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5971 states, 5970 states have (on average 2.761139028475712) internal successors, (16484), 5970 states have internal predecessors, (16484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:55,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5971 states to 5971 states and 16484 transitions. [2021-08-21 11:07:55,846 INFO L78 Accepts]: Start accepts. Automaton has 5971 states and 16484 transitions. Word has length 67 [2021-08-21 11:07:55,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:07:55,847 INFO L470 AbstractCegarLoop]: Abstraction has 5971 states and 16484 transitions. [2021-08-21 11:07:55,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:55,847 INFO L276 IsEmpty]: Start isEmpty. Operand 5971 states and 16484 transitions. [2021-08-21 11:07:55,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:07:55,852 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:07:55,853 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:07:55,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-21 11:07:56,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:56,054 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:07:56,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:07:56,055 INFO L82 PathProgramCache]: Analyzing trace with hash 750743793, now seen corresponding path program 63 times [2021-08-21 11:07:56,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:07:56,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723182637] [2021-08-21 11:07:56,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:07:56,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:07:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:56,195 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 11:07:56,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:07:56,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723182637] [2021-08-21 11:07:56,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723182637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:56,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266595460] [2021-08-21 11:07:56,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:07:56,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:56,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:07:56,197 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:07:56,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 11:08:00,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 11:08:00,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:08:00,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:08:00,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:08:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:01,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266595460] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:01,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:08:01,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:08:01,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940400365] [2021-08-21 11:08:01,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:08:01,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:08:01,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:08:01,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:08:01,106 INFO L87 Difference]: Start difference. First operand 5971 states and 16484 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:01,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:08:01,608 INFO L93 Difference]: Finished difference Result 8336 states and 21861 transitions. [2021-08-21 11:08:01,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 11:08:01,609 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:08:01,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:08:01,620 INFO L225 Difference]: With dead ends: 8336 [2021-08-21 11:08:01,621 INFO L226 Difference]: Without dead ends: 8184 [2021-08-21 11:08:01,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 504.7ms TimeCoverageRelationStatistics Valid=395, Invalid=1165, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 11:08:01,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8184 states. [2021-08-21 11:08:01,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8184 to 5971. [2021-08-21 11:08:01,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5971 states, 5970 states have (on average 2.761139028475712) internal successors, (16484), 5970 states have internal predecessors, (16484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:01,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5971 states to 5971 states and 16484 transitions. [2021-08-21 11:08:01,709 INFO L78 Accepts]: Start accepts. Automaton has 5971 states and 16484 transitions. Word has length 67 [2021-08-21 11:08:01,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:08:01,709 INFO L470 AbstractCegarLoop]: Abstraction has 5971 states and 16484 transitions. [2021-08-21 11:08:01,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:01,709 INFO L276 IsEmpty]: Start isEmpty. Operand 5971 states and 16484 transitions. [2021-08-21 11:08:01,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:08:01,715 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:08:01,715 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:08:01,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-21 11:08:01,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:01,916 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:08:01,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:08:01,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1510659293, now seen corresponding path program 64 times [2021-08-21 11:08:01,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:08:01,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465385738] [2021-08-21 11:08:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:08:01,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:08:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:02,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:08:02,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465385738] [2021-08-21 11:08:02,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465385738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:02,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606722233] [2021-08-21 11:08:02,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:08:02,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:02,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:08:02,076 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:08:02,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 11:08:06,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:08:06,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:08:06,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:08:06,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:08:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:07,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606722233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:07,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:08:07,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:08:07,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131472946] [2021-08-21 11:08:07,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:08:07,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:08:07,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:08:07,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:08:07,065 INFO L87 Difference]: Start difference. First operand 5971 states and 16484 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:07,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:08:07,496 INFO L93 Difference]: Finished difference Result 8311 states and 21798 transitions. [2021-08-21 11:08:07,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 11:08:07,496 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:08:07,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:08:07,507 INFO L225 Difference]: With dead ends: 8311 [2021-08-21 11:08:07,507 INFO L226 Difference]: Without dead ends: 8159 [2021-08-21 11:08:07,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 480.5ms TimeCoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 11:08:07,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8159 states. [2021-08-21 11:08:07,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8159 to 5896. [2021-08-21 11:08:07,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5896 states, 5895 states have (on average 2.768278201865988) internal successors, (16319), 5895 states have internal predecessors, (16319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:07,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5896 states to 5896 states and 16319 transitions. [2021-08-21 11:08:07,584 INFO L78 Accepts]: Start accepts. Automaton has 5896 states and 16319 transitions. Word has length 67 [2021-08-21 11:08:07,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:08:07,585 INFO L470 AbstractCegarLoop]: Abstraction has 5896 states and 16319 transitions. [2021-08-21 11:08:07,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:07,585 INFO L276 IsEmpty]: Start isEmpty. Operand 5896 states and 16319 transitions. [2021-08-21 11:08:07,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:08:07,590 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:08:07,590 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:08:07,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-21 11:08:07,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:07,791 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:08:07,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:08:07,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1270360241, now seen corresponding path program 65 times [2021-08-21 11:08:07,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:08:07,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931151207] [2021-08-21 11:08:07,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:08:07,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:08:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:07,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:08:07,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931151207] [2021-08-21 11:08:07,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931151207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:07,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051050226] [2021-08-21 11:08:07,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:08:07,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:07,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:08:07,936 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:08:07,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 11:08:12,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 11:08:12,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:08:12,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:08:12,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:08:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:12,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051050226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:12,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:08:12,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:08:12,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12678307] [2021-08-21 11:08:12,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:08:12,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:08:12,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:08:12,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:08:12,982 INFO L87 Difference]: Start difference. First operand 5896 states and 16319 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:13,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:08:13,455 INFO L93 Difference]: Finished difference Result 8314 states and 21795 transitions. [2021-08-21 11:08:13,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 11:08:13,455 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:08:13,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:08:13,467 INFO L225 Difference]: With dead ends: 8314 [2021-08-21 11:08:13,467 INFO L226 Difference]: Without dead ends: 8162 [2021-08-21 11:08:13,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 514.0ms TimeCoverageRelationStatistics Valid=446, Invalid=1276, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 11:08:13,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8162 states. [2021-08-21 11:08:13,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8162 to 6041. [2021-08-21 11:08:13,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6041 states, 6040 states have (on average 2.754635761589404) internal successors, (16638), 6040 states have internal predecessors, (16638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:13,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6041 states to 6041 states and 16638 transitions. [2021-08-21 11:08:13,546 INFO L78 Accepts]: Start accepts. Automaton has 6041 states and 16638 transitions. Word has length 67 [2021-08-21 11:08:13,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:08:13,546 INFO L470 AbstractCegarLoop]: Abstraction has 6041 states and 16638 transitions. [2021-08-21 11:08:13,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:13,546 INFO L276 IsEmpty]: Start isEmpty. Operand 6041 states and 16638 transitions. [2021-08-21 11:08:13,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:08:13,552 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:08:13,552 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:08:13,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-21 11:08:13,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:13,753 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:08:13,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:08:13,753 INFO L82 PathProgramCache]: Analyzing trace with hash 894659747, now seen corresponding path program 66 times [2021-08-21 11:08:13,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:08:13,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352042945] [2021-08-21 11:08:13,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:08:13,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:08:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:13,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:08:13,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352042945] [2021-08-21 11:08:13,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352042945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:13,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539125021] [2021-08-21 11:08:13,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:08:13,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:13,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:08:13,998 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:08:13,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 11:08:18,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 11:08:18,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:08:18,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:08:18,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:08:19,113 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:19,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539125021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:19,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:08:19,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:08:19,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097420499] [2021-08-21 11:08:19,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:08:19,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:08:19,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:08:19,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:08:19,114 INFO L87 Difference]: Start difference. First operand 6041 states and 16638 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:19,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:08:19,658 INFO L93 Difference]: Finished difference Result 8562 states and 22291 transitions. [2021-08-21 11:08:19,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 11:08:19,658 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:08:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:08:19,670 INFO L225 Difference]: With dead ends: 8562 [2021-08-21 11:08:19,670 INFO L226 Difference]: Without dead ends: 8410 [2021-08-21 11:08:19,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 670.2ms TimeCoverageRelationStatistics Valid=492, Invalid=1400, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 11:08:19,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8410 states. [2021-08-21 11:08:19,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8410 to 6061. [2021-08-21 11:08:19,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6061 states, 6060 states have (on average 2.7528052805280527) internal successors, (16682), 6060 states have internal predecessors, (16682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6061 states to 6061 states and 16682 transitions. [2021-08-21 11:08:19,769 INFO L78 Accepts]: Start accepts. Automaton has 6061 states and 16682 transitions. Word has length 67 [2021-08-21 11:08:19,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:08:19,769 INFO L470 AbstractCegarLoop]: Abstraction has 6061 states and 16682 transitions. [2021-08-21 11:08:19,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:19,769 INFO L276 IsEmpty]: Start isEmpty. Operand 6061 states and 16682 transitions. [2021-08-21 11:08:19,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:08:19,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:08:19,775 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:08:19,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-21 11:08:19,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-21 11:08:19,976 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:08:19,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:08:19,976 INFO L82 PathProgramCache]: Analyzing trace with hash 480480255, now seen corresponding path program 67 times [2021-08-21 11:08:19,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:08:19,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240927743] [2021-08-21 11:08:19,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:08:19,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:08:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:20,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:08:20,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240927743] [2021-08-21 11:08:20,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240927743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:20,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887236412] [2021-08-21 11:08:20,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:08:20,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:20,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:08:20,126 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:08:20,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 11:08:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:24,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:08:24,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:08:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:25,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887236412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:25,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:08:25,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:08:25,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347854487] [2021-08-21 11:08:25,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:08:25,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:08:25,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:08:25,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:08:25,349 INFO L87 Difference]: Start difference. First operand 6061 states and 16682 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:25,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:08:25,887 INFO L93 Difference]: Finished difference Result 8611 states and 22378 transitions. [2021-08-21 11:08:25,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 11:08:25,887 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:08:25,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:08:25,899 INFO L225 Difference]: With dead ends: 8611 [2021-08-21 11:08:25,899 INFO L226 Difference]: Without dead ends: 8459 [2021-08-21 11:08:25,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 574.1ms TimeCoverageRelationStatistics Valid=548, Invalid=1522, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 11:08:25,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8459 states. [2021-08-21 11:08:25,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8459 to 6126. [2021-08-21 11:08:25,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6126 states, 6125 states have (on average 2.746938775510204) internal successors, (16825), 6125 states have internal predecessors, (16825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:25,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6126 states to 6126 states and 16825 transitions. [2021-08-21 11:08:25,980 INFO L78 Accepts]: Start accepts. Automaton has 6126 states and 16825 transitions. Word has length 67 [2021-08-21 11:08:25,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:08:25,980 INFO L470 AbstractCegarLoop]: Abstraction has 6126 states and 16825 transitions. [2021-08-21 11:08:25,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:25,980 INFO L276 IsEmpty]: Start isEmpty. Operand 6126 states and 16825 transitions. [2021-08-21 11:08:25,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:08:25,986 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:08:25,986 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:08:26,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-21 11:08:26,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-21 11:08:26,187 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:08:26,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:08:26,187 INFO L82 PathProgramCache]: Analyzing trace with hash 104779761, now seen corresponding path program 68 times [2021-08-21 11:08:26,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:08:26,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454395394] [2021-08-21 11:08:26,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:08:26,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:08:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:26,328 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 11:08:26,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:08:26,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454395394] [2021-08-21 11:08:26,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454395394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:26,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567623344] [2021-08-21 11:08:26,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:08:26,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:26,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:08:26,330 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:08:26,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 11:08:30,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:08:30,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:08:30,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:08:30,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:08:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:31,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567623344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:31,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:08:31,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:08:31,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753933489] [2021-08-21 11:08:31,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:08:31,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:08:31,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:08:31,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:08:31,539 INFO L87 Difference]: Start difference. First operand 6126 states and 16825 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:32,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:08:32,146 INFO L93 Difference]: Finished difference Result 8637 states and 22416 transitions. [2021-08-21 11:08:32,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 11:08:32,146 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:08:32,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:08:32,158 INFO L225 Difference]: With dead ends: 8637 [2021-08-21 11:08:32,159 INFO L226 Difference]: Without dead ends: 8485 [2021-08-21 11:08:32,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 610.7ms TimeCoverageRelationStatistics Valid=577, Invalid=1585, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 11:08:32,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8485 states. [2021-08-21 11:08:32,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8485 to 6101. [2021-08-21 11:08:32,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6101 states, 6100 states have (on average 2.7491803278688525) internal successors, (16770), 6100 states have internal predecessors, (16770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:32,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6101 states to 6101 states and 16770 transitions. [2021-08-21 11:08:32,243 INFO L78 Accepts]: Start accepts. Automaton has 6101 states and 16770 transitions. Word has length 67 [2021-08-21 11:08:32,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:08:32,243 INFO L470 AbstractCegarLoop]: Abstraction has 6101 states and 16770 transitions. [2021-08-21 11:08:32,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:32,243 INFO L276 IsEmpty]: Start isEmpty. Operand 6101 states and 16770 transitions. [2021-08-21 11:08:32,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:08:32,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:08:32,250 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:08:32,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-21 11:08:32,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-21 11:08:32,450 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:08:32,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:08:32,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1272452587, now seen corresponding path program 69 times [2021-08-21 11:08:32,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:08:32,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128392473] [2021-08-21 11:08:32,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:08:32,451 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:08:32,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:32,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:08:32,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128392473] [2021-08-21 11:08:32,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128392473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:32,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878332196] [2021-08-21 11:08:32,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:08:32,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:32,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:08:32,668 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:08:32,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 11:08:37,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 11:08:37,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:08:37,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:08:37,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:08:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:37,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878332196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:37,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:08:37,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:08:37,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610237522] [2021-08-21 11:08:37,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:08:37,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:08:37,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:08:37,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:08:37,952 INFO L87 Difference]: Start difference. First operand 6101 states and 16770 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:38,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:08:38,591 INFO L93 Difference]: Finished difference Result 8626 states and 22411 transitions. [2021-08-21 11:08:38,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 11:08:38,592 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:08:38,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:08:38,603 INFO L225 Difference]: With dead ends: 8626 [2021-08-21 11:08:38,603 INFO L226 Difference]: Without dead ends: 8474 [2021-08-21 11:08:38,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 642.8ms TimeCoverageRelationStatistics Valid=544, Invalid=1526, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 11:08:38,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8474 states. [2021-08-21 11:08:38,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8474 to 6091. [2021-08-21 11:08:38,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6091 states, 6090 states have (on average 2.75008210180624) internal successors, (16748), 6090 states have internal predecessors, (16748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:38,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6091 states to 6091 states and 16748 transitions. [2021-08-21 11:08:38,683 INFO L78 Accepts]: Start accepts. Automaton has 6091 states and 16748 transitions. Word has length 67 [2021-08-21 11:08:38,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:08:38,683 INFO L470 AbstractCegarLoop]: Abstraction has 6091 states and 16748 transitions. [2021-08-21 11:08:38,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:38,683 INFO L276 IsEmpty]: Start isEmpty. Operand 6091 states and 16748 transitions. [2021-08-21 11:08:38,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:08:38,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:08:38,689 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:08:38,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-21 11:08:38,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 11:08:38,890 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:08:38,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:08:38,890 INFO L82 PathProgramCache]: Analyzing trace with hash 563000169, now seen corresponding path program 70 times [2021-08-21 11:08:38,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:08:38,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914896703] [2021-08-21 11:08:38,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:08:38,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:08:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:39,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:08:39,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914896703] [2021-08-21 11:08:39,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914896703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:39,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106985356] [2021-08-21 11:08:39,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:08:39,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:39,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:08:39,037 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:08:39,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 11:08:43,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:08:43,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:08:43,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:08:43,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:08:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:44,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106985356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:44,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:08:44,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:08:44,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916008632] [2021-08-21 11:08:44,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:08:44,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:08:44,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:08:44,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:08:44,506 INFO L87 Difference]: Start difference. First operand 6091 states and 16748 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:45,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:08:45,070 INFO L93 Difference]: Finished difference Result 8551 states and 22246 transitions. [2021-08-21 11:08:45,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 11:08:45,070 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:08:45,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:08:45,082 INFO L225 Difference]: With dead ends: 8551 [2021-08-21 11:08:45,082 INFO L226 Difference]: Without dead ends: 8399 [2021-08-21 11:08:45,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 578.7ms TimeCoverageRelationStatistics Valid=476, Invalid=1330, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 11:08:45,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8399 states. [2021-08-21 11:08:45,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8399 to 6050. [2021-08-21 11:08:45,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6050 states, 6049 states have (on average 2.753017027607869) internal successors, (16653), 6049 states have internal predecessors, (16653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:45,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6050 states to 6050 states and 16653 transitions. [2021-08-21 11:08:45,196 INFO L78 Accepts]: Start accepts. Automaton has 6050 states and 16653 transitions. Word has length 67 [2021-08-21 11:08:45,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:08:45,196 INFO L470 AbstractCegarLoop]: Abstraction has 6050 states and 16653 transitions. [2021-08-21 11:08:45,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:45,196 INFO L276 IsEmpty]: Start isEmpty. Operand 6050 states and 16653 transitions. [2021-08-21 11:08:45,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:08:45,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:08:45,202 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:08:45,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-21 11:08:45,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-08-21 11:08:45,405 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:08:45,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:08:45,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1241569009, now seen corresponding path program 71 times [2021-08-21 11:08:45,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:08:45,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011967402] [2021-08-21 11:08:45,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:08:45,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:08:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:45,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:08:45,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011967402] [2021-08-21 11:08:45,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011967402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:45,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689424645] [2021-08-21 11:08:45,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:08:45,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:45,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:08:45,552 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:08:45,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 11:08:50,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:08:50,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:08:50,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:08:50,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:08:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:51,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689424645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:51,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:08:51,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:08:51,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758701828] [2021-08-21 11:08:51,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:08:51,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:08:51,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:08:51,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:08:51,039 INFO L87 Difference]: Start difference. First operand 6050 states and 16653 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:51,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:08:51,572 INFO L93 Difference]: Finished difference Result 8133 states and 21408 transitions. [2021-08-21 11:08:51,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 11:08:51,572 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:08:51,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:08:51,583 INFO L225 Difference]: With dead ends: 8133 [2021-08-21 11:08:51,583 INFO L226 Difference]: Without dead ends: 7981 [2021-08-21 11:08:51,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 565.4ms TimeCoverageRelationStatistics Valid=397, Invalid=1163, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 11:08:51,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7981 states. [2021-08-21 11:08:51,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7981 to 6055. [2021-08-21 11:08:51,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6055 states, 6054 states have (on average 2.7525602907168816) internal successors, (16664), 6054 states have internal predecessors, (16664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:51,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6055 states to 6055 states and 16664 transitions. [2021-08-21 11:08:51,659 INFO L78 Accepts]: Start accepts. Automaton has 6055 states and 16664 transitions. Word has length 67 [2021-08-21 11:08:51,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:08:51,659 INFO L470 AbstractCegarLoop]: Abstraction has 6055 states and 16664 transitions. [2021-08-21 11:08:51,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:51,660 INFO L276 IsEmpty]: Start isEmpty. Operand 6055 states and 16664 transitions. [2021-08-21 11:08:51,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:08:51,665 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:08:51,665 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:08:51,694 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 11:08:51,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:51,866 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:08:51,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:08:51,866 INFO L82 PathProgramCache]: Analyzing trace with hash -2031448995, now seen corresponding path program 72 times [2021-08-21 11:08:51,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:08:51,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810104823] [2021-08-21 11:08:51,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:08:51,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:08:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:52,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:08:52,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810104823] [2021-08-21 11:08:52,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810104823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:52,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322549905] [2021-08-21 11:08:52,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:08:52,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:52,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:08:52,013 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:08:52,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 11:08:56,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:08:56,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:08:56,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:08:56,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:08:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:57,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322549905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:57,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:08:57,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:08:57,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038273975] [2021-08-21 11:08:57,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:08:57,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:08:57,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:08:57,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:08:57,557 INFO L87 Difference]: Start difference. First operand 6055 states and 16664 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:58,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:08:58,084 INFO L93 Difference]: Finished difference Result 8166 states and 21471 transitions. [2021-08-21 11:08:58,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 11:08:58,085 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:08:58,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:08:58,096 INFO L225 Difference]: With dead ends: 8166 [2021-08-21 11:08:58,096 INFO L226 Difference]: Without dead ends: 8014 [2021-08-21 11:08:58,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 561.5ms TimeCoverageRelationStatistics Valid=399, Invalid=1161, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 11:08:58,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8014 states. [2021-08-21 11:08:58,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8014 to 6020. [2021-08-21 11:08:58,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6020 states, 6019 states have (on average 2.7557733842831036) internal successors, (16587), 6019 states have internal predecessors, (16587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:58,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6020 states to 6020 states and 16587 transitions. [2021-08-21 11:08:58,180 INFO L78 Accepts]: Start accepts. Automaton has 6020 states and 16587 transitions. Word has length 67 [2021-08-21 11:08:58,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:08:58,180 INFO L470 AbstractCegarLoop]: Abstraction has 6020 states and 16587 transitions. [2021-08-21 11:08:58,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:58,180 INFO L276 IsEmpty]: Start isEmpty. Operand 6020 states and 16587 transitions. [2021-08-21 11:08:58,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:08:58,186 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:08:58,186 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:08:58,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-21 11:08:58,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:58,387 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:08:58,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:08:58,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1929165809, now seen corresponding path program 73 times [2021-08-21 11:08:58,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:08:58,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746212728] [2021-08-21 11:08:58,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:08:58,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:08:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:58,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:08:58,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746212728] [2021-08-21 11:08:58,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746212728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:58,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483156376] [2021-08-21 11:08:58,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:08:58,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:58,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:08:58,595 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:08:58,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 11:09:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:09:03,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:09:03,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:09:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:04,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483156376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:04,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:09:04,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:09:04,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302625652] [2021-08-21 11:09:04,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:09:04,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:09:04,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:09:04,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:09:04,091 INFO L87 Difference]: Start difference. First operand 6020 states and 16587 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:04,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:09:04,496 INFO L93 Difference]: Finished difference Result 8107 states and 21346 transitions. [2021-08-21 11:09:04,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 11:09:04,496 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:09:04,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:09:04,508 INFO L225 Difference]: With dead ends: 8107 [2021-08-21 11:09:04,508 INFO L226 Difference]: Without dead ends: 7955 [2021-08-21 11:09:04,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 511.1ms TimeCoverageRelationStatistics Valid=350, Invalid=1056, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 11:09:04,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7955 states. [2021-08-21 11:09:04,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7955 to 5960. [2021-08-21 11:09:04,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5960 states, 5959 states have (on average 2.7613693572747104) internal successors, (16455), 5959 states have internal predecessors, (16455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:04,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5960 states to 5960 states and 16455 transitions. [2021-08-21 11:09:04,615 INFO L78 Accepts]: Start accepts. Automaton has 5960 states and 16455 transitions. Word has length 67 [2021-08-21 11:09:04,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:09:04,615 INFO L470 AbstractCegarLoop]: Abstraction has 5960 states and 16455 transitions. [2021-08-21 11:09:04,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:04,616 INFO L276 IsEmpty]: Start isEmpty. Operand 5960 states and 16455 transitions. [2021-08-21 11:09:04,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:09:04,621 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:09:04,621 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:09:04,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-21 11:09:04,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-21 11:09:04,822 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:09:04,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:09:04,822 INFO L82 PathProgramCache]: Analyzing trace with hash 728306231, now seen corresponding path program 74 times [2021-08-21 11:09:04,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:09:04,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468729118] [2021-08-21 11:09:04,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:09:04,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:09:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:09:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:04,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:09:04,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468729118] [2021-08-21 11:09:04,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468729118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:04,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051820744] [2021-08-21 11:09:04,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:09:04,964 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:04,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:09:04,965 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:09:04,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 11:09:10,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:09:10,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:09:10,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:09:10,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:09:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:10,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051820744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:10,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:09:10,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:09:10,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515100589] [2021-08-21 11:09:10,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:09:10,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:09:10,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:09:10,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:09:10,615 INFO L87 Difference]: Start difference. First operand 5960 states and 16455 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:10,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:09:10,999 INFO L93 Difference]: Finished difference Result 8800 states and 22805 transitions. [2021-08-21 11:09:10,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 11:09:10,999 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:09:10,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:09:11,011 INFO L225 Difference]: With dead ends: 8800 [2021-08-21 11:09:11,011 INFO L226 Difference]: Without dead ends: 8648 [2021-08-21 11:09:11,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 431.6ms TimeCoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 11:09:11,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8648 states. [2021-08-21 11:09:11,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8648 to 6010. [2021-08-21 11:09:11,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6010 states, 6009 states have (on average 2.7566982859044766) internal successors, (16565), 6009 states have internal predecessors, (16565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:11,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6010 states to 6010 states and 16565 transitions. [2021-08-21 11:09:11,091 INFO L78 Accepts]: Start accepts. Automaton has 6010 states and 16565 transitions. Word has length 67 [2021-08-21 11:09:11,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:09:11,091 INFO L470 AbstractCegarLoop]: Abstraction has 6010 states and 16565 transitions. [2021-08-21 11:09:11,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:11,091 INFO L276 IsEmpty]: Start isEmpty. Operand 6010 states and 16565 transitions. [2021-08-21 11:09:11,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:09:11,097 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:09:11,097 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:09:11,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-21 11:09:11,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-08-21 11:09:11,297 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:09:11,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:09:11,298 INFO L82 PathProgramCache]: Analyzing trace with hash -2041114941, now seen corresponding path program 75 times [2021-08-21 11:09:11,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:09:11,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255939775] [2021-08-21 11:09:11,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:09:11,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:09:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:09:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:11,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:09:11,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255939775] [2021-08-21 11:09:11,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255939775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:11,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451119598] [2021-08-21 11:09:11,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:09:11,441 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:11,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:09:11,441 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:09:11,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 11:09:16,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:09:16,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:09:16,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:09:16,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:09:17,104 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:17,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451119598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:17,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:09:17,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:09:17,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851559749] [2021-08-21 11:09:17,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:09:17,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:09:17,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:09:17,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:09:17,105 INFO L87 Difference]: Start difference. First operand 6010 states and 16565 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:17,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:09:17,615 INFO L93 Difference]: Finished difference Result 8996 states and 23169 transitions. [2021-08-21 11:09:17,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 11:09:17,615 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 11:09:17,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:09:17,627 INFO L225 Difference]: With dead ends: 8996 [2021-08-21 11:09:17,627 INFO L226 Difference]: Without dead ends: 8844 [2021-08-21 11:09:17,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 499.8ms TimeCoverageRelationStatistics Valid=439, Invalid=1283, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 11:09:17,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8844 states. [2021-08-21 11:09:17,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8844 to 6085. [2021-08-21 11:09:17,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6085 states, 6084 states have (on average 2.749835634451019) internal successors, (16730), 6084 states have internal predecessors, (16730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6085 states to 6085 states and 16730 transitions. [2021-08-21 11:09:17,708 INFO L78 Accepts]: Start accepts. Automaton has 6085 states and 16730 transitions. Word has length 67 [2021-08-21 11:09:17,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:09:17,709 INFO L470 AbstractCegarLoop]: Abstraction has 6085 states and 16730 transitions. [2021-08-21 11:09:17,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 6085 states and 16730 transitions. [2021-08-21 11:09:17,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:09:17,714 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:09:17,714 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:09:17,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-21 11:09:17,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:17,915 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:09:17,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:09:17,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1878151861, now seen corresponding path program 76 times [2021-08-21 11:09:17,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:09:17,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301764265] [2021-08-21 11:09:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:09:17,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:09:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:09:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:18,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:09:18,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301764265] [2021-08-21 11:09:18,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301764265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:18,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703827849] [2021-08-21 11:09:18,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:09:18,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:18,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:09:18,051 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:09:18,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 11:09:23,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:09:23,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:09:23,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:09:23,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:09:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:23,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703827849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:23,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:09:23,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:09:23,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354332404] [2021-08-21 11:09:23,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:09:23,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:09:23,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:09:23,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:09:23,815 INFO L87 Difference]: Start difference. First operand 6085 states and 16730 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:24,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:09:24,396 INFO L93 Difference]: Finished difference Result 8986 states and 23147 transitions. [2021-08-21 11:09:24,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 11:09:24,396 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:09:24,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:09:24,408 INFO L225 Difference]: With dead ends: 8986 [2021-08-21 11:09:24,408 INFO L226 Difference]: Without dead ends: 8834 [2021-08-21 11:09:24,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 578.2ms TimeCoverageRelationStatistics Valid=502, Invalid=1390, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 11:09:24,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8834 states. [2021-08-21 11:09:24,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8834 to 6085. [2021-08-21 11:09:24,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6085 states, 6084 states have (on average 2.749835634451019) internal successors, (16730), 6084 states have internal predecessors, (16730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:24,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6085 states to 6085 states and 16730 transitions. [2021-08-21 11:09:24,508 INFO L78 Accepts]: Start accepts. Automaton has 6085 states and 16730 transitions. Word has length 67 [2021-08-21 11:09:24,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:09:24,508 INFO L470 AbstractCegarLoop]: Abstraction has 6085 states and 16730 transitions. [2021-08-21 11:09:24,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:24,508 INFO L276 IsEmpty]: Start isEmpty. Operand 6085 states and 16730 transitions. [2021-08-21 11:09:24,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:09:24,514 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:09:24,514 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:09:24,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-21 11:09:24,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:24,714 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:09:24,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:09:24,715 INFO L82 PathProgramCache]: Analyzing trace with hash 388435113, now seen corresponding path program 77 times [2021-08-21 11:09:24,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:09:24,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420677866] [2021-08-21 11:09:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:09:24,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:09:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:09:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:24,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:09:24,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420677866] [2021-08-21 11:09:24,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420677866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:24,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285500591] [2021-08-21 11:09:24,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:09:24,862 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:24,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:09:24,863 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:09:24,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 11:09:30,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:09:30,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:09:30,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:09:30,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:09:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:30,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285500591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:30,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:09:30,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:09:30,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682601767] [2021-08-21 11:09:30,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:09:30,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:09:30,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:09:30,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:09:30,705 INFO L87 Difference]: Start difference. First operand 6085 states and 16730 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:31,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:09:31,186 INFO L93 Difference]: Finished difference Result 8905 states and 23012 transitions. [2021-08-21 11:09:31,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 11:09:31,186 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:09:31,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:09:31,198 INFO L225 Difference]: With dead ends: 8905 [2021-08-21 11:09:31,198 INFO L226 Difference]: Without dead ends: 8753 [2021-08-21 11:09:31,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 494.8ms TimeCoverageRelationStatistics Valid=403, Invalid=1157, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 11:09:31,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8753 states. [2021-08-21 11:09:31,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8753 to 6060. [2021-08-21 11:09:31,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6060 states, 6059 states have (on average 2.752104307641525) internal successors, (16675), 6059 states have internal predecessors, (16675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:31,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6060 states to 6060 states and 16675 transitions. [2021-08-21 11:09:31,312 INFO L78 Accepts]: Start accepts. Automaton has 6060 states and 16675 transitions. Word has length 67 [2021-08-21 11:09:31,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:09:31,313 INFO L470 AbstractCegarLoop]: Abstraction has 6060 states and 16675 transitions. [2021-08-21 11:09:31,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:31,313 INFO L276 IsEmpty]: Start isEmpty. Operand 6060 states and 16675 transitions. [2021-08-21 11:09:31,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:09:31,318 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:09:31,319 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:09:31,348 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 11:09:31,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-21 11:09:31,521 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:09:31,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:09:31,521 INFO L82 PathProgramCache]: Analyzing trace with hash -340981321, now seen corresponding path program 78 times [2021-08-21 11:09:31,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:09:31,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682669179] [2021-08-21 11:09:31,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:09:31,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:09:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:09:31,656 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 11:09:31,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:09:31,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682669179] [2021-08-21 11:09:31,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682669179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:31,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996123231] [2021-08-21 11:09:31,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:09:31,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:31,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:09:31,657 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:09:31,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 11:09:36,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:09:36,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:09:36,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:09:36,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:09:37,528 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:37,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996123231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:37,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:09:37,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:09:37,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437471573] [2021-08-21 11:09:37,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:09:37,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:09:37,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:09:37,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:09:37,529 INFO L87 Difference]: Start difference. First operand 6060 states and 16675 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:38,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:09:38,135 INFO L93 Difference]: Finished difference Result 9102 states and 23351 transitions. [2021-08-21 11:09:38,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 11:09:38,136 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:09:38,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:09:38,148 INFO L225 Difference]: With dead ends: 9102 [2021-08-21 11:09:38,148 INFO L226 Difference]: Without dead ends: 8950 [2021-08-21 11:09:38,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 590.9ms TimeCoverageRelationStatistics Valid=564, Invalid=1788, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 11:09:38,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8950 states. [2021-08-21 11:09:38,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8950 to 6135. [2021-08-21 11:09:38,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6135 states, 6134 states have (on average 2.7453537658950116) internal successors, (16840), 6134 states have internal predecessors, (16840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:38,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6135 states to 6135 states and 16840 transitions. [2021-08-21 11:09:38,239 INFO L78 Accepts]: Start accepts. Automaton has 6135 states and 16840 transitions. Word has length 67 [2021-08-21 11:09:38,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:09:38,239 INFO L470 AbstractCegarLoop]: Abstraction has 6135 states and 16840 transitions. [2021-08-21 11:09:38,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:38,239 INFO L276 IsEmpty]: Start isEmpty. Operand 6135 states and 16840 transitions. [2021-08-21 11:09:38,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:09:38,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:09:38,245 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:09:38,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-21 11:09:38,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-21 11:09:38,446 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:09:38,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:09:38,447 INFO L82 PathProgramCache]: Analyzing trace with hash -716681815, now seen corresponding path program 79 times [2021-08-21 11:09:38,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:09:38,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086084327] [2021-08-21 11:09:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:09:38,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:09:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:09:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:38,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:09:38,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086084327] [2021-08-21 11:09:38,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086084327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:38,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960066781] [2021-08-21 11:09:38,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:09:38,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:38,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:09:38,624 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:09:38,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 11:09:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:09:43,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:09:43,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:09:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:44,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960066781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:44,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:09:44,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:09:44,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759431117] [2021-08-21 11:09:44,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:09:44,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:09:44,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:09:44,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:09:44,505 INFO L87 Difference]: Start difference. First operand 6135 states and 16840 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:45,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:09:45,068 INFO L93 Difference]: Finished difference Result 9056 states and 23269 transitions. [2021-08-21 11:09:45,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 11:09:45,069 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:09:45,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:09:45,081 INFO L225 Difference]: With dead ends: 9056 [2021-08-21 11:09:45,082 INFO L226 Difference]: Without dead ends: 8904 [2021-08-21 11:09:45,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 535.8ms TimeCoverageRelationStatistics Valid=529, Invalid=1541, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 11:09:45,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8904 states. [2021-08-21 11:09:45,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8904 to 6185. [2021-08-21 11:09:45,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6185 states, 6184 states have (on average 2.7409443725743854) internal successors, (16950), 6184 states have internal predecessors, (16950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:45,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6185 states to 6185 states and 16950 transitions. [2021-08-21 11:09:45,173 INFO L78 Accepts]: Start accepts. Automaton has 6185 states and 16950 transitions. Word has length 67 [2021-08-21 11:09:45,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:09:45,173 INFO L470 AbstractCegarLoop]: Abstraction has 6185 states and 16950 transitions. [2021-08-21 11:09:45,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:45,174 INFO L276 IsEmpty]: Start isEmpty. Operand 6185 states and 16950 transitions. [2021-08-21 11:09:45,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:09:45,180 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:09:45,180 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:09:45,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-21 11:09:45,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-21 11:09:45,381 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:09:45,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:09:45,381 INFO L82 PathProgramCache]: Analyzing trace with hash -305850193, now seen corresponding path program 29 times [2021-08-21 11:09:45,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:09:45,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860677243] [2021-08-21 11:09:45,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:09:45,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:09:45,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:09:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:45,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:09:45,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860677243] [2021-08-21 11:09:45,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860677243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:45,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652809566] [2021-08-21 11:09:45,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:09:45,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:45,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:09:45,516 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:09:45,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 11:09:50,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 11:09:50,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:09:50,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:09:50,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:09:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:51,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652809566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:51,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:09:51,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:09:51,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613834530] [2021-08-21 11:09:51,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:09:51,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:09:51,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:09:51,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:09:51,531 INFO L87 Difference]: Start difference. First operand 6185 states and 16950 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:52,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:09:52,090 INFO L93 Difference]: Finished difference Result 9053 states and 23320 transitions. [2021-08-21 11:09:52,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 11:09:52,091 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:09:52,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:09:52,104 INFO L225 Difference]: With dead ends: 9053 [2021-08-21 11:09:52,104 INFO L226 Difference]: Without dead ends: 8749 [2021-08-21 11:09:52,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 574.4ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 11:09:52,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8749 states. [2021-08-21 11:09:52,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8749 to 6185. [2021-08-21 11:09:52,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6185 states, 6184 states have (on average 2.7409443725743854) internal successors, (16950), 6184 states have internal predecessors, (16950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:52,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6185 states to 6185 states and 16950 transitions. [2021-08-21 11:09:52,193 INFO L78 Accepts]: Start accepts. Automaton has 6185 states and 16950 transitions. Word has length 67 [2021-08-21 11:09:52,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:09:52,193 INFO L470 AbstractCegarLoop]: Abstraction has 6185 states and 16950 transitions. [2021-08-21 11:09:52,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:52,194 INFO L276 IsEmpty]: Start isEmpty. Operand 6185 states and 16950 transitions. [2021-08-21 11:09:52,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:09:52,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:09:52,200 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:09:52,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-21 11:09:52,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:52,401 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:09:52,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:09:52,401 INFO L82 PathProgramCache]: Analyzing trace with hash -959591535, now seen corresponding path program 80 times [2021-08-21 11:09:52,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:09:52,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017183509] [2021-08-21 11:09:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:09:52,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:09:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:09:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:52,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:09:52,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017183509] [2021-08-21 11:09:52,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017183509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:52,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157603210] [2021-08-21 11:09:52,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:09:52,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:52,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:09:52,616 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:09:52,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 11:09:58,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:09:58,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:09:58,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:09:58,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:09:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:58,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157603210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:58,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:09:58,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:09:58,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450417672] [2021-08-21 11:09:58,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:09:58,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:09:58,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:09:58,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:09:58,753 INFO L87 Difference]: Start difference. First operand 6185 states and 16950 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:59,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:09:59,308 INFO L93 Difference]: Finished difference Result 8827 states and 22826 transitions. [2021-08-21 11:09:59,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 11:09:59,308 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:09:59,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:09:59,320 INFO L225 Difference]: With dead ends: 8827 [2021-08-21 11:09:59,320 INFO L226 Difference]: Without dead ends: 8675 [2021-08-21 11:09:59,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 630.3ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 11:09:59,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8675 states. [2021-08-21 11:09:59,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8675 to 6185. [2021-08-21 11:09:59,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6185 states, 6184 states have (on average 2.7409443725743854) internal successors, (16950), 6184 states have internal predecessors, (16950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:59,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6185 states to 6185 states and 16950 transitions. [2021-08-21 11:09:59,405 INFO L78 Accepts]: Start accepts. Automaton has 6185 states and 16950 transitions. Word has length 67 [2021-08-21 11:09:59,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:09:59,405 INFO L470 AbstractCegarLoop]: Abstraction has 6185 states and 16950 transitions. [2021-08-21 11:09:59,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:59,406 INFO L276 IsEmpty]: Start isEmpty. Operand 6185 states and 16950 transitions. [2021-08-21 11:09:59,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:09:59,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:09:59,411 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:09:59,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-21 11:09:59,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-08-21 11:09:59,612 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:09:59,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:09:59,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1335292029, now seen corresponding path program 81 times [2021-08-21 11:09:59,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:09:59,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005270166] [2021-08-21 11:09:59,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:09:59,612 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:09:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:09:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:59,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:09:59,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005270166] [2021-08-21 11:09:59,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005270166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:59,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693962881] [2021-08-21 11:09:59,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:09:59,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:59,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:09:59,831 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:09:59,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 11:10:05,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 11:10:05,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:10:05,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:10:05,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:10:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:05,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693962881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:05,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:10:05,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:10:05,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413137789] [2021-08-21 11:10:05,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:10:05,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:10:05,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:10:05,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:10:05,866 INFO L87 Difference]: Start difference. First operand 6185 states and 16950 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:06,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:10:06,527 INFO L93 Difference]: Finished difference Result 8911 states and 22974 transitions. [2021-08-21 11:10:06,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 11:10:06,527 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:10:06,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:10:06,539 INFO L225 Difference]: With dead ends: 8911 [2021-08-21 11:10:06,540 INFO L226 Difference]: Without dead ends: 8759 [2021-08-21 11:10:06,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 663.2ms TimeCoverageRelationStatistics Valid=546, Invalid=1710, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 11:10:06,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8759 states. [2021-08-21 11:10:06,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8759 to 6185. [2021-08-21 11:10:06,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6185 states, 6184 states have (on average 2.7409443725743854) internal successors, (16950), 6184 states have internal predecessors, (16950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:06,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6185 states to 6185 states and 16950 transitions. [2021-08-21 11:10:06,627 INFO L78 Accepts]: Start accepts. Automaton has 6185 states and 16950 transitions. Word has length 67 [2021-08-21 11:10:06,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:10:06,627 INFO L470 AbstractCegarLoop]: Abstraction has 6185 states and 16950 transitions. [2021-08-21 11:10:06,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:06,627 INFO L276 IsEmpty]: Start isEmpty. Operand 6185 states and 16950 transitions. [2021-08-21 11:10:06,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:10:06,635 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:10:06,635 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:10:06,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-21 11:10:06,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-08-21 11:10:06,835 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:10:06,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:10:06,836 INFO L82 PathProgramCache]: Analyzing trace with hash -575376529, now seen corresponding path program 82 times [2021-08-21 11:10:06,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:10:06,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604398853] [2021-08-21 11:10:06,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:10:06,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:10:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:10:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:07,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:10:07,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604398853] [2021-08-21 11:10:07,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604398853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:07,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798697281] [2021-08-21 11:10:07,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:10:07,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:07,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:10:07,081 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:10:07,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 11:10:12,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:10:12,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:10:12,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:10:12,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:10:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:13,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798697281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:13,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:10:13,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:10:13,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498797555] [2021-08-21 11:10:13,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:10:13,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:10:13,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:10:13,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:10:13,150 INFO L87 Difference]: Start difference. First operand 6185 states and 16950 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:13,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:10:13,629 INFO L93 Difference]: Finished difference Result 8672 states and 22501 transitions. [2021-08-21 11:10:13,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 11:10:13,629 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:10:13,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:10:13,641 INFO L225 Difference]: With dead ends: 8672 [2021-08-21 11:10:13,641 INFO L226 Difference]: Without dead ends: 8520 [2021-08-21 11:10:13,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 597.7ms TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 11:10:13,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8520 states. [2021-08-21 11:10:13,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8520 to 6085. [2021-08-21 11:10:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6085 states, 6084 states have (on average 2.749835634451019) internal successors, (16730), 6084 states have internal predecessors, (16730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:13,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6085 states to 6085 states and 16730 transitions. [2021-08-21 11:10:13,722 INFO L78 Accepts]: Start accepts. Automaton has 6085 states and 16730 transitions. Word has length 67 [2021-08-21 11:10:13,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:10:13,722 INFO L470 AbstractCegarLoop]: Abstraction has 6085 states and 16730 transitions. [2021-08-21 11:10:13,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:13,723 INFO L276 IsEmpty]: Start isEmpty. Operand 6085 states and 16730 transitions. [2021-08-21 11:10:13,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:10:13,728 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:10:13,728 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:10:13,759 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 11:10:13,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-21 11:10:13,929 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:10:13,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:10:13,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1405787655, now seen corresponding path program 83 times [2021-08-21 11:10:13,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:10:13,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051870014] [2021-08-21 11:10:13,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:10:13,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:10:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:10:14,063 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:14,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:10:14,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051870014] [2021-08-21 11:10:14,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051870014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:14,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854259074] [2021-08-21 11:10:14,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:10:14,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:14,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:10:14,064 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:10:14,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 11:10:19,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:10:19,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:10:19,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:10:19,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:10:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:20,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854259074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:20,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:10:20,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:10:20,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069684640] [2021-08-21 11:10:20,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:10:20,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:10:20,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:10:20,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:10:20,289 INFO L87 Difference]: Start difference. First operand 6085 states and 16730 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:20,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:10:20,691 INFO L93 Difference]: Finished difference Result 8935 states and 23060 transitions. [2021-08-21 11:10:20,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 11:10:20,692 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:10:20,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:10:20,704 INFO L225 Difference]: With dead ends: 8935 [2021-08-21 11:10:20,704 INFO L226 Difference]: Without dead ends: 8783 [2021-08-21 11:10:20,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 421.6ms TimeCoverageRelationStatistics Valid=370, Invalid=1036, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 11:10:20,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8783 states. [2021-08-21 11:10:20,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8783 to 6110. [2021-08-21 11:10:20,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6110 states, 6109 states have (on average 2.7475855295465705) internal successors, (16785), 6109 states have internal predecessors, (16785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:20,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6110 states to 6110 states and 16785 transitions. [2021-08-21 11:10:20,791 INFO L78 Accepts]: Start accepts. Automaton has 6110 states and 16785 transitions. Word has length 67 [2021-08-21 11:10:20,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:10:20,791 INFO L470 AbstractCegarLoop]: Abstraction has 6110 states and 16785 transitions. [2021-08-21 11:10:20,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:20,791 INFO L276 IsEmpty]: Start isEmpty. Operand 6110 states and 16785 transitions. [2021-08-21 11:10:20,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:10:20,797 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:10:20,797 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:10:20,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-21 11:10:20,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-08-21 11:10:20,998 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:10:20,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:10:20,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1363633517, now seen corresponding path program 84 times [2021-08-21 11:10:20,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:10:20,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810804200] [2021-08-21 11:10:20,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:10:20,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:10:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:10:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:21,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:10:21,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810804200] [2021-08-21 11:10:21,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810804200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:21,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787887655] [2021-08-21 11:10:21,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:10:21,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:21,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:10:21,134 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:10:21,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 11:10:26,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:10:26,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:10:26,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:10:26,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:10:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:27,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787887655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:27,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:10:27,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:10:27,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889591657] [2021-08-21 11:10:27,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:10:27,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:10:27,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:10:27,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:10:27,391 INFO L87 Difference]: Start difference. First operand 6110 states and 16785 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:27,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:10:27,903 INFO L93 Difference]: Finished difference Result 9136 states and 23459 transitions. [2021-08-21 11:10:27,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 11:10:27,903 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 11:10:27,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:10:27,915 INFO L225 Difference]: With dead ends: 9136 [2021-08-21 11:10:27,916 INFO L226 Difference]: Without dead ends: 8984 [2021-08-21 11:10:27,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 509.4ms TimeCoverageRelationStatistics Valid=447, Invalid=1359, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 11:10:27,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8984 states. [2021-08-21 11:10:27,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8984 to 6185. [2021-08-21 11:10:27,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6185 states, 6184 states have (on average 2.7409443725743854) internal successors, (16950), 6184 states have internal predecessors, (16950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:28,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6185 states to 6185 states and 16950 transitions. [2021-08-21 11:10:28,002 INFO L78 Accepts]: Start accepts. Automaton has 6185 states and 16950 transitions. Word has length 67 [2021-08-21 11:10:28,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:10:28,002 INFO L470 AbstractCegarLoop]: Abstraction has 6185 states and 16950 transitions. [2021-08-21 11:10:28,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:28,002 INFO L276 IsEmpty]: Start isEmpty. Operand 6185 states and 16950 transitions. [2021-08-21 11:10:28,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:10:28,008 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:10:28,008 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:10:28,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-21 11:10:28,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:28,218 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:10:28,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:10:28,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1739334011, now seen corresponding path program 85 times [2021-08-21 11:10:28,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:10:28,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301047956] [2021-08-21 11:10:28,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:10:28,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:10:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:10:28,354 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 11:10:28,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:10:28,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301047956] [2021-08-21 11:10:28,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301047956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:28,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426816908] [2021-08-21 11:10:28,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:10:28,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:28,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:10:28,355 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:10:28,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 11:10:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:10:34,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:10:34,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:10:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:34,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426816908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:34,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:10:34,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:10:34,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715764705] [2021-08-21 11:10:34,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:10:34,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:10:34,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:10:34,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:10:34,658 INFO L87 Difference]: Start difference. First operand 6185 states and 16950 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:35,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:10:35,318 INFO L93 Difference]: Finished difference Result 9081 states and 23322 transitions. [2021-08-21 11:10:35,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 11:10:35,318 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:10:35,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:10:35,333 INFO L225 Difference]: With dead ends: 9081 [2021-08-21 11:10:35,333 INFO L226 Difference]: Without dead ends: 8929 [2021-08-21 11:10:35,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 652.7ms TimeCoverageRelationStatistics Valid=510, Invalid=1470, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 11:10:35,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8929 states. [2021-08-21 11:10:35,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8929 to 6185. [2021-08-21 11:10:35,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6185 states, 6184 states have (on average 2.7409443725743854) internal successors, (16950), 6184 states have internal predecessors, (16950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:35,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6185 states to 6185 states and 16950 transitions. [2021-08-21 11:10:35,421 INFO L78 Accepts]: Start accepts. Automaton has 6185 states and 16950 transitions. Word has length 67 [2021-08-21 11:10:35,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:10:35,422 INFO L470 AbstractCegarLoop]: Abstraction has 6185 states and 16950 transitions. [2021-08-21 11:10:35,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:35,422 INFO L276 IsEmpty]: Start isEmpty. Operand 6185 states and 16950 transitions. [2021-08-21 11:10:35,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:10:35,427 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:10:35,428 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:10:35,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-21 11:10:35,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:35,628 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:10:35,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:10:35,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1065916537, now seen corresponding path program 86 times [2021-08-21 11:10:35,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:10:35,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717267341] [2021-08-21 11:10:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:10:35,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:10:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:10:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:35,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:10:35,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717267341] [2021-08-21 11:10:35,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717267341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:35,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295253433] [2021-08-21 11:10:35,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:10:35,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:35,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:10:35,767 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:10:35,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 11:10:41,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:10:41,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:10:41,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:10:41,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:10:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:42,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295253433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:42,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:10:42,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:10:42,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048099759] [2021-08-21 11:10:42,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:10:42,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:10:42,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:10:42,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:10:42,091 INFO L87 Difference]: Start difference. First operand 6185 states and 16950 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:42,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:10:42,660 INFO L93 Difference]: Finished difference Result 9080 states and 23347 transitions. [2021-08-21 11:10:42,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 11:10:42,661 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:10:42,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:10:42,674 INFO L225 Difference]: With dead ends: 9080 [2021-08-21 11:10:42,674 INFO L226 Difference]: Without dead ends: 8928 [2021-08-21 11:10:42,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 496.3ms TimeCoverageRelationStatistics Valid=410, Invalid=1230, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 11:10:42,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8928 states. [2021-08-21 11:10:42,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8928 to 6160. [2021-08-21 11:10:42,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6160 states, 6159 states have (on average 2.743140120149375) internal successors, (16895), 6159 states have internal predecessors, (16895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6160 states to 6160 states and 16895 transitions. [2021-08-21 11:10:42,784 INFO L78 Accepts]: Start accepts. Automaton has 6160 states and 16895 transitions. Word has length 67 [2021-08-21 11:10:42,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:10:42,784 INFO L470 AbstractCegarLoop]: Abstraction has 6160 states and 16895 transitions. [2021-08-21 11:10:42,784 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 11:10:42,784 INFO L276 IsEmpty]: Start isEmpty. Operand 6160 states and 16895 transitions. [2021-08-21 11:10:42,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:10:42,790 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:10:42,790 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:10:42,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-21 11:10:42,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:42,992 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:10:42,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:10:42,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1795887049, now seen corresponding path program 87 times [2021-08-21 11:10:42,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:10:42,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938859494] [2021-08-21 11:10:42,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:10:42,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:10:43,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:10:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:43,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:10:43,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938859494] [2021-08-21 11:10:43,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938859494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:43,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925135052] [2021-08-21 11:10:43,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:10:43,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:43,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:10:43,132 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:10:43,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 11:10:48,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 11:10:48,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:10:48,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:10:48,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:10:49,529 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:49,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925135052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:49,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:10:49,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:10:49,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202447920] [2021-08-21 11:10:49,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:10:49,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:10:49,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:10:49,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:10:49,531 INFO L87 Difference]: Start difference. First operand 6160 states and 16895 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:49,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:10:49,967 INFO L93 Difference]: Finished difference Result 8920 states and 23035 transitions. [2021-08-21 11:10:49,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 11:10:49,968 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:10:49,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:10:49,980 INFO L225 Difference]: With dead ends: 8920 [2021-08-21 11:10:49,980 INFO L226 Difference]: Without dead ends: 8768 [2021-08-21 11:10:49,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 431.9ms TimeCoverageRelationStatistics Valid=384, Invalid=1098, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 11:10:49,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8768 states. [2021-08-21 11:10:50,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8768 to 6160. [2021-08-21 11:10:50,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6160 states, 6159 states have (on average 2.743140120149375) internal successors, (16895), 6159 states have internal predecessors, (16895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:50,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6160 states to 6160 states and 16895 transitions. [2021-08-21 11:10:50,060 INFO L78 Accepts]: Start accepts. Automaton has 6160 states and 16895 transitions. Word has length 67 [2021-08-21 11:10:50,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:10:50,060 INFO L470 AbstractCegarLoop]: Abstraction has 6160 states and 16895 transitions. [2021-08-21 11:10:50,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:50,060 INFO L276 IsEmpty]: Start isEmpty. Operand 6160 states and 16895 transitions. [2021-08-21 11:10:50,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:10:50,066 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:10:50,066 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:10:50,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-21 11:10:50,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-21 11:10:50,266 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:10:50,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:10:50,267 INFO L82 PathProgramCache]: Analyzing trace with hash 512962443, now seen corresponding path program 88 times [2021-08-21 11:10:50,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:10:50,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123319237] [2021-08-21 11:10:50,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:10:50,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:10:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:10:50,411 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:50,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:10:50,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123319237] [2021-08-21 11:10:50,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123319237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:50,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102600634] [2021-08-21 11:10:50,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:10:50,411 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:50,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:10:50,412 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:10:50,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 11:10:56,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:10:56,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:10:56,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:10:56,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:10:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:56,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102600634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:56,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:10:56,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:10:56,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876674305] [2021-08-21 11:10:56,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:10:56,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:10:56,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:10:56,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:10:56,852 INFO L87 Difference]: Start difference. First operand 6160 states and 16895 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:57,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:10:57,502 INFO L93 Difference]: Finished difference Result 11306 states and 29823 transitions. [2021-08-21 11:10:57,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 11:10:57,502 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:10:57,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:10:57,518 INFO L225 Difference]: With dead ends: 11306 [2021-08-21 11:10:57,518 INFO L226 Difference]: Without dead ends: 11154 [2021-08-21 11:10:57,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 629.8ms TimeCoverageRelationStatistics Valid=553, Invalid=1609, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 11:10:57,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11154 states. [2021-08-21 11:10:57,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11154 to 6345. [2021-08-21 11:10:57,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6345 states, 6344 states have (on average 2.7514186633039093) internal successors, (17455), 6344 states have internal predecessors, (17455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:57,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6345 states to 6345 states and 17455 transitions. [2021-08-21 11:10:57,620 INFO L78 Accepts]: Start accepts. Automaton has 6345 states and 17455 transitions. Word has length 67 [2021-08-21 11:10:57,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:10:57,620 INFO L470 AbstractCegarLoop]: Abstraction has 6345 states and 17455 transitions. [2021-08-21 11:10:57,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:57,621 INFO L276 IsEmpty]: Start isEmpty. Operand 6345 states and 17455 transitions. [2021-08-21 11:10:57,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:10:57,626 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:10:57,627 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:10:57,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-21 11:10:57,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-21 11:10:57,827 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:10:57,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:10:57,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1806861553, now seen corresponding path program 89 times [2021-08-21 11:10:57,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:10:57,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218800620] [2021-08-21 11:10:57,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:10:57,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:10:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:10:58,018 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:58,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:10:58,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218800620] [2021-08-21 11:10:58,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218800620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:58,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693942636] [2021-08-21 11:10:58,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:10:58,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:58,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:10:58,019 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:10:58,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 11:11:03,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:11:03,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:11:03,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:11:03,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:11:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:04,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693942636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:04,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:11:04,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:11:04,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622747259] [2021-08-21 11:11:04,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:11:04,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:11:04,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:11:04,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:11:04,478 INFO L87 Difference]: Start difference. First operand 6345 states and 17455 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:05,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:11:05,429 INFO L93 Difference]: Finished difference Result 13551 states and 36085 transitions. [2021-08-21 11:11:05,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 11:11:05,430 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:11:05,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:11:05,450 INFO L225 Difference]: With dead ends: 13551 [2021-08-21 11:11:05,450 INFO L226 Difference]: Without dead ends: 13169 [2021-08-21 11:11:05,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 874.2ms TimeCoverageRelationStatistics Valid=864, Invalid=2676, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 11:11:05,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13169 states. [2021-08-21 11:11:05,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13169 to 6210. [2021-08-21 11:11:05,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6210 states, 6209 states have (on average 2.7532613947495572) internal successors, (17095), 6209 states have internal predecessors, (17095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:05,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6210 states to 6210 states and 17095 transitions. [2021-08-21 11:11:05,622 INFO L78 Accepts]: Start accepts. Automaton has 6210 states and 17095 transitions. Word has length 67 [2021-08-21 11:11:05,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:11:05,622 INFO L470 AbstractCegarLoop]: Abstraction has 6210 states and 17095 transitions. [2021-08-21 11:11:05,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:05,622 INFO L276 IsEmpty]: Start isEmpty. Operand 6210 states and 17095 transitions. [2021-08-21 11:11:05,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:11:05,628 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:11:05,628 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:11:05,660 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 11:11:05,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-21 11:11:05,829 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:11:05,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:11:05,829 INFO L82 PathProgramCache]: Analyzing trace with hash 560252031, now seen corresponding path program 90 times [2021-08-21 11:11:05,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:11:05,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342492624] [2021-08-21 11:11:05,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:11:05,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:11:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:11:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:05,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:11:05,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342492624] [2021-08-21 11:11:05,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342492624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:05,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358030711] [2021-08-21 11:11:05,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:11:05,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:11:05,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:11:05,970 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:11:05,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 11:11:12,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:11:12,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:11:12,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:11:12,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:11:12,497 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 11:11:12,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358030711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:12,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:11:12,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:11:12,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278166335] [2021-08-21 11:11:12,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:11:12,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:11:12,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:11:12,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:11:12,498 INFO L87 Difference]: Start difference. First operand 6210 states and 17095 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:13,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:11:13,334 INFO L93 Difference]: Finished difference Result 12340 states and 32642 transitions. [2021-08-21 11:11:13,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 11:11:13,334 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:11:13,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:11:13,351 INFO L225 Difference]: With dead ends: 12340 [2021-08-21 11:11:13,351 INFO L226 Difference]: Without dead ends: 12188 [2021-08-21 11:11:13,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 741.5ms TimeCoverageRelationStatistics Valid=668, Invalid=2088, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 11:11:13,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12188 states. [2021-08-21 11:11:13,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12188 to 6530. [2021-08-21 11:11:13,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6530 states, 6529 states have (on average 2.784499923418594) internal successors, (18180), 6529 states have internal predecessors, (18180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:13,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6530 states to 6530 states and 18180 transitions. [2021-08-21 11:11:13,463 INFO L78 Accepts]: Start accepts. Automaton has 6530 states and 18180 transitions. Word has length 67 [2021-08-21 11:11:13,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:11:13,463 INFO L470 AbstractCegarLoop]: Abstraction has 6530 states and 18180 transitions. [2021-08-21 11:11:13,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:13,463 INFO L276 IsEmpty]: Start isEmpty. Operand 6530 states and 18180 transitions. [2021-08-21 11:11:13,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:11:13,470 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:11:13,470 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:11:13,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-08-21 11:11:13,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-21 11:11:13,670 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:11:13,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:11:13,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1759571965, now seen corresponding path program 91 times [2021-08-21 11:11:13,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:11:13,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404771648] [2021-08-21 11:11:13,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:11:13,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:11:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:11:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:13,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:11:13,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404771648] [2021-08-21 11:11:13,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404771648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:13,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274689942] [2021-08-21 11:11:13,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:11:13,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:11:13,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:11:13,805 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:11:13,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 11:11:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:11:19,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:11:19,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:11:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:20,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274689942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:20,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:11:20,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:11:20,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036401112] [2021-08-21 11:11:20,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:11:20,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:11:20,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:11:20,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:11:20,445 INFO L87 Difference]: Start difference. First operand 6530 states and 18180 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:21,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:11:21,565 INFO L93 Difference]: Finished difference Result 14085 states and 37676 transitions. [2021-08-21 11:11:21,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 11:11:21,565 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:11:21,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:11:21,586 INFO L225 Difference]: With dead ends: 14085 [2021-08-21 11:11:21,586 INFO L226 Difference]: Without dead ends: 13703 [2021-08-21 11:11:21,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 1017.9ms TimeCoverageRelationStatistics Valid=913, Invalid=2993, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 11:11:21,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13703 states. [2021-08-21 11:11:21,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13703 to 6410. [2021-08-21 11:11:21,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6410 states, 6409 states have (on average 2.7781245124044314) internal successors, (17805), 6409 states have internal predecessors, (17805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:21,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6410 states to 6410 states and 17805 transitions. [2021-08-21 11:11:21,722 INFO L78 Accepts]: Start accepts. Automaton has 6410 states and 17805 transitions. Word has length 67 [2021-08-21 11:11:21,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:11:21,722 INFO L470 AbstractCegarLoop]: Abstraction has 6410 states and 17805 transitions. [2021-08-21 11:11:21,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:21,723 INFO L276 IsEmpty]: Start isEmpty. Operand 6410 states and 17805 transitions. [2021-08-21 11:11:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:11:21,729 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:11:21,729 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:11:21,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-21 11:11:21,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-21 11:11:21,933 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:11:21,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:11:21,933 INFO L82 PathProgramCache]: Analyzing trace with hash -52418233, now seen corresponding path program 92 times [2021-08-21 11:11:21,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:11:21,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300323888] [2021-08-21 11:11:21,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:11:21,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:11:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:11:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:22,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:11:22,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300323888] [2021-08-21 11:11:22,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300323888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:22,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576624330] [2021-08-21 11:11:22,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:11:22,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:11:22,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:11:22,072 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:11:22,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 11:11:28,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:11:28,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:11:28,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:11:28,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:11:28,759 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:28,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576624330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:28,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:11:28,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:11:28,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683519700] [2021-08-21 11:11:28,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:11:28,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:11:28,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:11:28,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:11:28,761 INFO L87 Difference]: Start difference. First operand 6410 states and 17805 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:29,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:11:29,489 INFO L93 Difference]: Finished difference Result 10553 states and 27133 transitions. [2021-08-21 11:11:29,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 11:11:29,490 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:11:29,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:11:29,506 INFO L225 Difference]: With dead ends: 10553 [2021-08-21 11:11:29,506 INFO L226 Difference]: Without dead ends: 10401 [2021-08-21 11:11:29,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 717.0ms TimeCoverageRelationStatistics Valid=583, Invalid=1867, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 11:11:29,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10401 states. [2021-08-21 11:11:29,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10401 to 6500. [2021-08-21 11:11:29,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6500 states, 6499 states have (on average 2.776581012463456) internal successors, (18045), 6499 states have internal predecessors, (18045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:29,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6500 states to 6500 states and 18045 transitions. [2021-08-21 11:11:29,615 INFO L78 Accepts]: Start accepts. Automaton has 6500 states and 18045 transitions. Word has length 67 [2021-08-21 11:11:29,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:11:29,615 INFO L470 AbstractCegarLoop]: Abstraction has 6500 states and 18045 transitions. [2021-08-21 11:11:29,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:29,616 INFO L276 IsEmpty]: Start isEmpty. Operand 6500 states and 18045 transitions. [2021-08-21 11:11:29,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:11:29,623 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:11:29,623 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:11:29,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-08-21 11:11:29,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:11:29,824 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:11:29,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:11:29,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1798438605, now seen corresponding path program 93 times [2021-08-21 11:11:29,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:11:29,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768179034] [2021-08-21 11:11:29,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:11:29,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:11:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:11:29,996 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:29,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:11:29,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768179034] [2021-08-21 11:11:29,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768179034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:29,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153724000] [2021-08-21 11:11:29,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:11:29,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:11:29,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:11:29,997 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:11:29,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 11:11:36,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 11:11:36,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:11:36,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:11:36,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:11:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:36,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153724000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:36,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:11:36,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:11:36,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677513631] [2021-08-21 11:11:36,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:11:36,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:11:36,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:11:36,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:11:36,661 INFO L87 Difference]: Start difference. First operand 6500 states and 18045 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:37,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:11:37,548 INFO L93 Difference]: Finished difference Result 12366 states and 33043 transitions. [2021-08-21 11:11:37,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 11:11:37,548 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:11:37,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:11:37,566 INFO L225 Difference]: With dead ends: 12366 [2021-08-21 11:11:37,566 INFO L226 Difference]: Without dead ends: 12214 [2021-08-21 11:11:37,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 824.3ms TimeCoverageRelationStatistics Valid=713, Invalid=2149, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 11:11:37,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12214 states. [2021-08-21 11:11:37,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12214 to 6740. [2021-08-21 11:11:37,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6740 states, 6739 states have (on average 2.7889894643122126) internal successors, (18795), 6739 states have internal predecessors, (18795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:37,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6740 states to 6740 states and 18795 transitions. [2021-08-21 11:11:37,685 INFO L78 Accepts]: Start accepts. Automaton has 6740 states and 18795 transitions. Word has length 67 [2021-08-21 11:11:37,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:11:37,685 INFO L470 AbstractCegarLoop]: Abstraction has 6740 states and 18795 transitions. [2021-08-21 11:11:37,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:37,685 INFO L276 IsEmpty]: Start isEmpty. Operand 6740 states and 18795 transitions. [2021-08-21 11:11:37,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:11:37,692 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:11:37,693 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:11:37,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-08-21 11:11:37,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:11:37,893 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:11:37,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:11:37,893 INFO L82 PathProgramCache]: Analyzing trace with hash -521385391, now seen corresponding path program 94 times [2021-08-21 11:11:37,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:11:37,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854778170] [2021-08-21 11:11:37,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:11:37,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:11:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:11:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:38,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:11:38,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854778170] [2021-08-21 11:11:38,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854778170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:38,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368649475] [2021-08-21 11:11:38,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:11:38,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:11:38,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:11:38,109 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:11:38,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 11:11:44,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:11:44,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:11:44,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:11:44,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:11:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:45,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368649475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:45,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:11:45,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:11:45,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018185745] [2021-08-21 11:11:45,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:11:45,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:11:45,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:11:45,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:11:45,004 INFO L87 Difference]: Start difference. First operand 6740 states and 18795 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:46,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:11:46,255 INFO L93 Difference]: Finished difference Result 14591 states and 39275 transitions. [2021-08-21 11:11:46,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 11:11:46,255 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:11:46,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:11:46,274 INFO L225 Difference]: With dead ends: 14591 [2021-08-21 11:11:46,275 INFO L226 Difference]: Without dead ends: 14209 [2021-08-21 11:11:46,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1294 ImplicationChecksByTransitivity, 1150.7ms TimeCoverageRelationStatistics Valid=994, Invalid=3038, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 11:11:46,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14209 states. [2021-08-21 11:11:46,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14209 to 6410. [2021-08-21 11:11:46,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6410 states, 6409 states have (on average 2.7781245124044314) internal successors, (17805), 6409 states have internal predecessors, (17805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:46,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6410 states to 6410 states and 17805 transitions. [2021-08-21 11:11:46,385 INFO L78 Accepts]: Start accepts. Automaton has 6410 states and 17805 transitions. Word has length 67 [2021-08-21 11:11:46,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:11:46,385 INFO L470 AbstractCegarLoop]: Abstraction has 6410 states and 17805 transitions. [2021-08-21 11:11:46,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:46,385 INFO L276 IsEmpty]: Start isEmpty. Operand 6410 states and 17805 transitions. [2021-08-21 11:11:46,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:11:46,391 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:11:46,391 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:11:46,424 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 11:11:46,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-21 11:11:46,592 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:11:46,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:11:46,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1433107623, now seen corresponding path program 95 times [2021-08-21 11:11:46,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:11:46,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071603305] [2021-08-21 11:11:46,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:11:46,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:11:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:11:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:46,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:11:46,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071603305] [2021-08-21 11:11:46,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071603305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:46,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625251402] [2021-08-21 11:11:46,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:11:46,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:11:46,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:11:46,762 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:11:46,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 11:11:53,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:11:53,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:11:53,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:11:53,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:11:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:53,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625251402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:53,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:11:53,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:11:53,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861395765] [2021-08-21 11:11:53,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:11:53,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:11:53,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:11:53,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:11:53,611 INFO L87 Difference]: Start difference. First operand 6410 states and 17805 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:54,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:11:54,409 INFO L93 Difference]: Finished difference Result 12345 states and 32931 transitions. [2021-08-21 11:11:54,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 11:11:54,410 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:11:54,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:11:54,427 INFO L225 Difference]: With dead ends: 12345 [2021-08-21 11:11:54,428 INFO L226 Difference]: Without dead ends: 12193 [2021-08-21 11:11:54,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 752.8ms TimeCoverageRelationStatistics Valid=618, Invalid=1932, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 11:11:54,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12193 states. [2021-08-21 11:11:54,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12193 to 6645. [2021-08-21 11:11:54,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6645 states, 6644 states have (on average 2.79425045153522) internal successors, (18565), 6644 states have internal predecessors, (18565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:54,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6645 states to 6645 states and 18565 transitions. [2021-08-21 11:11:54,539 INFO L78 Accepts]: Start accepts. Automaton has 6645 states and 18565 transitions. Word has length 67 [2021-08-21 11:11:54,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:11:54,539 INFO L470 AbstractCegarLoop]: Abstraction has 6645 states and 18565 transitions. [2021-08-21 11:11:54,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:54,539 INFO L276 IsEmpty]: Start isEmpty. Operand 6645 states and 18565 transitions. [2021-08-21 11:11:54,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:11:54,545 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:11:54,545 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:11:54,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-21 11:11:54,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:11:54,747 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:11:54,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:11:54,747 INFO L82 PathProgramCache]: Analyzing trace with hash 542035677, now seen corresponding path program 96 times [2021-08-21 11:11:54,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:11:54,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827397864] [2021-08-21 11:11:54,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:11:54,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:11:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:11:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:54,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:11:54,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827397864] [2021-08-21 11:11:54,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827397864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:54,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963049204] [2021-08-21 11:11:54,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:11:54,883 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:11:54,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:11:54,888 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:11:54,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 11:12:01,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:12:01,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:12:01,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:12:01,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:12:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:01,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963049204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:01,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:12:01,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:12:01,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601137256] [2021-08-21 11:12:01,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:12:01,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:12:01,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:12:01,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:12:01,840 INFO L87 Difference]: Start difference. First operand 6645 states and 18565 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:03,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:12:03,018 INFO L93 Difference]: Finished difference Result 14471 states and 39126 transitions. [2021-08-21 11:12:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 11:12:03,019 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:12:03,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:12:03,041 INFO L225 Difference]: With dead ends: 14471 [2021-08-21 11:12:03,041 INFO L226 Difference]: Without dead ends: 14089 [2021-08-21 11:12:03,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 1070.0ms TimeCoverageRelationStatistics Valid=932, Invalid=3100, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 11:12:03,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14089 states. [2021-08-21 11:12:03,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14089 to 6285. [2021-08-21 11:12:03,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6285 states, 6284 states have (on average 2.7753023551877787) internal successors, (17440), 6284 states have internal predecessors, (17440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:03,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6285 states to 6285 states and 17440 transitions. [2021-08-21 11:12:03,160 INFO L78 Accepts]: Start accepts. Automaton has 6285 states and 17440 transitions. Word has length 67 [2021-08-21 11:12:03,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:12:03,160 INFO L470 AbstractCegarLoop]: Abstraction has 6285 states and 17440 transitions. [2021-08-21 11:12:03,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:03,160 INFO L276 IsEmpty]: Start isEmpty. Operand 6285 states and 17440 transitions. [2021-08-21 11:12:03,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:12:03,166 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:12:03,166 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:12:03,199 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 11:12:03,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:03,369 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:12:03,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:12:03,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1724786699, now seen corresponding path program 97 times [2021-08-21 11:12:03,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:12:03,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641864723] [2021-08-21 11:12:03,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:12:03,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:12:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:12:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:03,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:12:03,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641864723] [2021-08-21 11:12:03,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641864723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:03,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272372245] [2021-08-21 11:12:03,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:12:03,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:03,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:12:03,565 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:12:03,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 11:12:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:12:09,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:12:09,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:12:10,380 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:10,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272372245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:10,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:12:10,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:12:10,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341961062] [2021-08-21 11:12:10,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:12:10,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:12:10,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:12:10,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:12:10,381 INFO L87 Difference]: Start difference. First operand 6285 states and 17440 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:11,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:12:11,238 INFO L93 Difference]: Finished difference Result 12650 states and 33652 transitions. [2021-08-21 11:12:11,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 11:12:11,238 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:12:11,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:12:11,257 INFO L225 Difference]: With dead ends: 12650 [2021-08-21 11:12:11,257 INFO L226 Difference]: Without dead ends: 12498 [2021-08-21 11:12:11,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 781.7ms TimeCoverageRelationStatistics Valid=814, Invalid=2608, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 11:12:11,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12498 states. [2021-08-21 11:12:11,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12498 to 6905. [2021-08-21 11:12:11,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6905 states, 6904 states have (on average 2.8179316338354576) internal successors, (19455), 6904 states have internal predecessors, (19455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:11,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6905 states to 6905 states and 19455 transitions. [2021-08-21 11:12:11,372 INFO L78 Accepts]: Start accepts. Automaton has 6905 states and 19455 transitions. Word has length 67 [2021-08-21 11:12:11,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:12:11,372 INFO L470 AbstractCegarLoop]: Abstraction has 6905 states and 19455 transitions. [2021-08-21 11:12:11,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:11,373 INFO L276 IsEmpty]: Start isEmpty. Operand 6905 states and 19455 transitions. [2021-08-21 11:12:11,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:12:11,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:12:11,379 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:12:11,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-08-21 11:12:11,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:11,580 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:12:11,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:12:11,580 INFO L82 PathProgramCache]: Analyzing trace with hash -595037297, now seen corresponding path program 98 times [2021-08-21 11:12:11,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:12:11,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362608910] [2021-08-21 11:12:11,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:12:11,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:12:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:12:11,716 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:11,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:12:11,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362608910] [2021-08-21 11:12:11,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362608910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:11,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168527463] [2021-08-21 11:12:11,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:12:11,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:11,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:12:11,718 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:12:11,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 11:12:18,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:12:18,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:12:18,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:12:18,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:12:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:18,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168527463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:18,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:12:18,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:12:18,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017530311] [2021-08-21 11:12:18,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:12:18,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:12:18,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:12:18,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:12:18,693 INFO L87 Difference]: Start difference. First operand 6905 states and 19455 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:19,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:12:19,823 INFO L93 Difference]: Finished difference Result 14851 states and 40076 transitions. [2021-08-21 11:12:19,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 11:12:19,824 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:12:19,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:12:19,847 INFO L225 Difference]: With dead ends: 14851 [2021-08-21 11:12:19,847 INFO L226 Difference]: Without dead ends: 14469 [2021-08-21 11:12:19,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 1018.0ms TimeCoverageRelationStatistics Valid=1058, Invalid=3634, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 11:12:19,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14469 states. [2021-08-21 11:12:19,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14469 to 6710. [2021-08-21 11:12:19,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6710 states, 6709 states have (on average 2.8059323297063647) internal successors, (18825), 6709 states have internal predecessors, (18825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:19,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6710 states to 6710 states and 18825 transitions. [2021-08-21 11:12:19,974 INFO L78 Accepts]: Start accepts. Automaton has 6710 states and 18825 transitions. Word has length 67 [2021-08-21 11:12:19,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:12:19,974 INFO L470 AbstractCegarLoop]: Abstraction has 6710 states and 18825 transitions. [2021-08-21 11:12:19,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:19,975 INFO L276 IsEmpty]: Start isEmpty. Operand 6710 states and 18825 transitions. [2021-08-21 11:12:19,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:12:19,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:12:19,981 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:12:20,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-21 11:12:20,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:20,182 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:12:20,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:12:20,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1112116435, now seen corresponding path program 99 times [2021-08-21 11:12:20,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:12:20,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956010849] [2021-08-21 11:12:20,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:12:20,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:12:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:12:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:20,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:12:20,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956010849] [2021-08-21 11:12:20,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956010849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:20,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008258044] [2021-08-21 11:12:20,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:12:20,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:20,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:12:20,344 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:12:20,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 11:12:26,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:12:26,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:12:26,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:12:26,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:12:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:27,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008258044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:27,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:12:27,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:12:27,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010185574] [2021-08-21 11:12:27,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:12:27,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:12:27,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:12:27,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:12:27,345 INFO L87 Difference]: Start difference. First operand 6710 states and 18825 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:28,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:12:28,068 INFO L93 Difference]: Finished difference Result 11084 states and 28890 transitions. [2021-08-21 11:12:28,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 11:12:28,068 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:12:28,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:12:28,084 INFO L225 Difference]: With dead ends: 11084 [2021-08-21 11:12:28,084 INFO L226 Difference]: Without dead ends: 10932 [2021-08-21 11:12:28,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 674.0ms TimeCoverageRelationStatistics Valid=598, Invalid=2054, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 11:12:28,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10932 states. [2021-08-21 11:12:28,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10932 to 7030. [2021-08-21 11:12:28,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7030 states, 7029 states have (on average 2.819746763408735) internal successors, (19820), 7029 states have internal predecessors, (19820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:28,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7030 states to 7030 states and 19820 transitions. [2021-08-21 11:12:28,192 INFO L78 Accepts]: Start accepts. Automaton has 7030 states and 19820 transitions. Word has length 67 [2021-08-21 11:12:28,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:12:28,192 INFO L470 AbstractCegarLoop]: Abstraction has 7030 states and 19820 transitions. [2021-08-21 11:12:28,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:28,192 INFO L276 IsEmpty]: Start isEmpty. Operand 7030 states and 19820 transitions. [2021-08-21 11:12:28,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:12:28,199 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:12:28,199 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:12:28,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-21 11:12:28,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-21 11:12:28,400 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:12:28,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:12:28,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1331994023, now seen corresponding path program 100 times [2021-08-21 11:12:28,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:12:28,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394137698] [2021-08-21 11:12:28,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:12:28,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:12:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:12:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:28,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:12:28,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394137698] [2021-08-21 11:12:28,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394137698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:28,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403823757] [2021-08-21 11:12:28,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:12:28,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:28,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:12:28,541 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:12:28,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-21 11:12:35,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:12:35,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:12:35,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:12:35,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:12:35,570 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:35,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403823757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:35,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:12:35,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:12:35,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404710948] [2021-08-21 11:12:35,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:12:35,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:12:35,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:12:35,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:12:35,572 INFO L87 Difference]: Start difference. First operand 7030 states and 19820 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:36,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:12:36,584 INFO L93 Difference]: Finished difference Result 13682 states and 36788 transitions. [2021-08-21 11:12:36,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 11:12:36,585 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:12:36,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:12:36,608 INFO L225 Difference]: With dead ends: 13682 [2021-08-21 11:12:36,608 INFO L226 Difference]: Without dead ends: 13530 [2021-08-21 11:12:36,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 918.5ms TimeCoverageRelationStatistics Valid=957, Invalid=3075, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 11:12:36,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13530 states. [2021-08-21 11:12:36,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13530 to 7420. [2021-08-21 11:12:36,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7420 states, 7419 states have (on average 2.8413532821134924) internal successors, (21080), 7419 states have internal predecessors, (21080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:36,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7420 states to 7420 states and 21080 transitions. [2021-08-21 11:12:36,745 INFO L78 Accepts]: Start accepts. Automaton has 7420 states and 21080 transitions. Word has length 67 [2021-08-21 11:12:36,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:12:36,745 INFO L470 AbstractCegarLoop]: Abstraction has 7420 states and 21080 transitions. [2021-08-21 11:12:36,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:36,745 INFO L276 IsEmpty]: Start isEmpty. Operand 7420 states and 21080 transitions. [2021-08-21 11:12:36,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:12:36,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:12:36,754 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 11:12:36,788 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 11:12:36,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-21 11:12:36,955 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:12:36,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:12:36,955 INFO L82 PathProgramCache]: Analyzing trace with hash 643149277, now seen corresponding path program 101 times [2021-08-21 11:12:36,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:12:36,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842237932] [2021-08-21 11:12:36,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:12:36,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:12:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:12:37,092 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 11:12:37,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:12:37,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842237932] [2021-08-21 11:12:37,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842237932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:37,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178217368] [2021-08-21 11:12:37,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:12:37,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:37,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:12:37,093 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:12:37,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-21 11:12:43,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:12:43,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:12:43,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:12:43,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:12:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:44,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178217368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:44,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:12:44,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:12:44,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496578266] [2021-08-21 11:12:44,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:12:44,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:12:44,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:12:44,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:12:44,155 INFO L87 Difference]: Start difference. First operand 7420 states and 21080 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:45,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:12:45,429 INFO L93 Difference]: Finished difference Result 15564 states and 42334 transitions. [2021-08-21 11:12:45,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 11:12:45,429 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:12:45,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:12:45,454 INFO L225 Difference]: With dead ends: 15564 [2021-08-21 11:12:45,455 INFO L226 Difference]: Without dead ends: 15182 [2021-08-21 11:12:45,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 1127.4ms TimeCoverageRelationStatistics Valid=1289, Invalid=4411, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 11:12:45,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15182 states. [2021-08-21 11:12:45,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15182 to 6988. [2021-08-21 11:12:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6988 states, 6987 states have (on average 2.82639187061686) internal successors, (19748), 6987 states have internal predecessors, (19748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6988 states to 6988 states and 19748 transitions. [2021-08-21 11:12:45,618 INFO L78 Accepts]: Start accepts. Automaton has 6988 states and 19748 transitions. Word has length 67 [2021-08-21 11:12:45,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:12:45,618 INFO L470 AbstractCegarLoop]: Abstraction has 6988 states and 19748 transitions. [2021-08-21 11:12:45,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 6988 states and 19748 transitions. [2021-08-21 11:12:45,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:12:45,626 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:12:45,626 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:12:45,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-21 11:12:45,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-21 11:12:45,829 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:12:45,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:12:45,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1286656387, now seen corresponding path program 102 times [2021-08-21 11:12:45,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:12:45,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861861881] [2021-08-21 11:12:45,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:12:45,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:12:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:12:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:45,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:12:45,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861861881] [2021-08-21 11:12:45,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861861881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:45,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520110055] [2021-08-21 11:12:45,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:12:45,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:45,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:12:45,968 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:12:45,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-21 11:12:52,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:12:52,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:12:52,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:12:52,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:12:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:53,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520110055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:53,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:12:53,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:12:53,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541416187] [2021-08-21 11:12:53,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:12:53,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:12:53,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:12:53,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:12:53,105 INFO L87 Difference]: Start difference. First operand 6988 states and 19748 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:54,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:12:54,143 INFO L93 Difference]: Finished difference Result 13794 states and 37265 transitions. [2021-08-21 11:12:54,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 11:12:54,144 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:12:54,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:12:54,166 INFO L225 Difference]: With dead ends: 13794 [2021-08-21 11:12:54,166 INFO L226 Difference]: Without dead ends: 13642 [2021-08-21 11:12:54,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 943.2ms TimeCoverageRelationStatistics Valid=915, Invalid=2867, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 11:12:54,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13642 states. [2021-08-21 11:12:54,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13642 to 7158. [2021-08-21 11:12:54,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7158 states, 7157 states have (on average 2.839597596758418) internal successors, (20323), 7157 states have internal predecessors, (20323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:54,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7158 states to 7158 states and 20323 transitions. [2021-08-21 11:12:54,302 INFO L78 Accepts]: Start accepts. Automaton has 7158 states and 20323 transitions. Word has length 67 [2021-08-21 11:12:54,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:12:54,303 INFO L470 AbstractCegarLoop]: Abstraction has 7158 states and 20323 transitions. [2021-08-21 11:12:54,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:54,303 INFO L276 IsEmpty]: Start isEmpty. Operand 7158 states and 20323 transitions. [2021-08-21 11:12:54,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:12:54,311 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:12:54,311 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:12:54,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-08-21 11:12:54,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:54,512 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:12:54,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:12:54,512 INFO L82 PathProgramCache]: Analyzing trace with hash 688486913, now seen corresponding path program 103 times [2021-08-21 11:12:54,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:12:54,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012008262] [2021-08-21 11:12:54,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:12:54,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:12:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:12:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:54,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:12:54,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012008262] [2021-08-21 11:12:54,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012008262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:54,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331160339] [2021-08-21 11:12:54,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:12:54,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:54,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:12:54,651 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:12:54,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-21 11:13:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:13:01,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:13:01,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:13:01,875 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:01,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331160339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:01,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:13:01,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:13:01,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659347107] [2021-08-21 11:13:01,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:13:01,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:13:01,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:13:01,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:13:01,876 INFO L87 Difference]: Start difference. First operand 7158 states and 20323 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:03,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:13:03,308 INFO L93 Difference]: Finished difference Result 15791 states and 43066 transitions. [2021-08-21 11:13:03,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-21 11:13:03,308 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:13:03,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:13:03,334 INFO L225 Difference]: With dead ends: 15791 [2021-08-21 11:13:03,334 INFO L226 Difference]: Without dead ends: 15409 [2021-08-21 11:13:03,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 1283.0ms TimeCoverageRelationStatistics Valid=1259, Invalid=3997, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 11:13:03,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15409 states. [2021-08-21 11:13:03,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15409 to 6963. [2021-08-21 11:13:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6963 states, 6962 states have (on average 2.828641195058891) internal successors, (19693), 6962 states have internal predecessors, (19693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:03,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6963 states to 6963 states and 19693 transitions. [2021-08-21 11:13:03,472 INFO L78 Accepts]: Start accepts. Automaton has 6963 states and 19693 transitions. Word has length 67 [2021-08-21 11:13:03,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:13:03,472 INFO L470 AbstractCegarLoop]: Abstraction has 6963 states and 19693 transitions. [2021-08-21 11:13:03,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:03,472 INFO L276 IsEmpty]: Start isEmpty. Operand 6963 states and 19693 transitions. [2021-08-21 11:13:03,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:13:03,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:13:03,479 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:13:03,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-21 11:13:03,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-21 11:13:03,680 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:13:03,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:13:03,680 INFO L82 PathProgramCache]: Analyzing trace with hash -2037015541, now seen corresponding path program 104 times [2021-08-21 11:13:03,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:13:03,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428839857] [2021-08-21 11:13:03,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:13:03,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:13:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:13:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:03,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:13:03,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428839857] [2021-08-21 11:13:03,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428839857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:03,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175875211] [2021-08-21 11:13:03,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:13:03,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:13:03,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:13:03,819 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:13:03,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-21 11:13:10,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:13:10,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:13:10,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:13:10,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:13:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:11,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175875211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:11,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:13:11,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:13:11,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899246673] [2021-08-21 11:13:11,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:13:11,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:13:11,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:13:11,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:13:11,066 INFO L87 Difference]: Start difference. First operand 6963 states and 19693 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:12,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:13:12,554 INFO L93 Difference]: Finished difference Result 15977 states and 42858 transitions. [2021-08-21 11:13:12,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-21 11:13:12,554 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:13:12,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:13:12,586 INFO L225 Difference]: With dead ends: 15977 [2021-08-21 11:13:12,586 INFO L226 Difference]: Without dead ends: 15125 [2021-08-21 11:13:12,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2127 ImplicationChecksByTransitivity, 1334.6ms TimeCoverageRelationStatistics Valid=1361, Invalid=4959, Unknown=0, NotChecked=0, Total=6320 [2021-08-21 11:13:12,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15125 states. [2021-08-21 11:13:12,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15125 to 7240. [2021-08-21 11:13:12,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7240 states, 7239 states have (on average 2.8412764193949442) internal successors, (20568), 7239 states have internal predecessors, (20568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:12,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7240 states to 7240 states and 20568 transitions. [2021-08-21 11:13:12,751 INFO L78 Accepts]: Start accepts. Automaton has 7240 states and 20568 transitions. Word has length 67 [2021-08-21 11:13:12,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:13:12,752 INFO L470 AbstractCegarLoop]: Abstraction has 7240 states and 20568 transitions. [2021-08-21 11:13:12,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:12,752 INFO L276 IsEmpty]: Start isEmpty. Operand 7240 states and 20568 transitions. [2021-08-21 11:13:12,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:13:12,760 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:13:12,760 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:13:12,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2021-08-21 11:13:12,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-21 11:13:12,965 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:13:12,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:13:12,965 INFO L82 PathProgramCache]: Analyzing trace with hash 965925823, now seen corresponding path program 105 times [2021-08-21 11:13:12,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:13:12,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784923666] [2021-08-21 11:13:12,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:13:12,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:13:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:13:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:13,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:13:13,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784923666] [2021-08-21 11:13:13,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784923666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:13,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962448278] [2021-08-21 11:13:13,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:13:13,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:13:13,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:13:13,104 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:13:13,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-21 11:13:19,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 11:13:19,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:13:19,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:13:19,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:13:20,402 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:20,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962448278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:20,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:13:20,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:13:20,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477993385] [2021-08-21 11:13:20,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:13:20,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:13:20,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:13:20,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:13:20,403 INFO L87 Difference]: Start difference. First operand 7240 states and 20568 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:21,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:13:21,393 INFO L93 Difference]: Finished difference Result 13012 states and 35553 transitions. [2021-08-21 11:13:21,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 11:13:21,394 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:13:21,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:13:21,414 INFO L225 Difference]: With dead ends: 13012 [2021-08-21 11:13:21,414 INFO L226 Difference]: Without dead ends: 12860 [2021-08-21 11:13:21,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 903.7ms TimeCoverageRelationStatistics Valid=766, Invalid=2540, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 11:13:21,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12860 states. [2021-08-21 11:13:21,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12860 to 7570. [2021-08-21 11:13:21,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7570 states, 7569 states have (on average 2.8481965913594927) internal successors, (21558), 7569 states have internal predecessors, (21558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:21,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7570 states to 7570 states and 21558 transitions. [2021-08-21 11:13:21,535 INFO L78 Accepts]: Start accepts. Automaton has 7570 states and 21558 transitions. Word has length 67 [2021-08-21 11:13:21,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:13:21,536 INFO L470 AbstractCegarLoop]: Abstraction has 7570 states and 21558 transitions. [2021-08-21 11:13:21,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:21,536 INFO L276 IsEmpty]: Start isEmpty. Operand 7570 states and 21558 transitions. [2021-08-21 11:13:21,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:13:21,544 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:13:21,544 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:13:21,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-08-21 11:13:21,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:13:21,745 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:13:21,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:13:21,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1353898173, now seen corresponding path program 106 times [2021-08-21 11:13:21,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:13:21,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301989083] [2021-08-21 11:13:21,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:13:21,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:13:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:13:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:21,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:13:21,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301989083] [2021-08-21 11:13:21,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301989083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:21,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017947579] [2021-08-21 11:13:21,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:13:21,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:13:21,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:13:21,948 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:13:21,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-21 11:13:28,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:13:28,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:13:28,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:13:28,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:13:29,337 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:29,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017947579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:29,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:13:29,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:13:29,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383921707] [2021-08-21 11:13:29,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:13:29,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:13:29,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:13:29,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:13:29,338 INFO L87 Difference]: Start difference. First operand 7570 states and 21558 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:30,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:13:30,693 INFO L93 Difference]: Finished difference Result 15043 states and 41617 transitions. [2021-08-21 11:13:30,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 11:13:30,693 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:13:30,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:13:30,718 INFO L225 Difference]: With dead ends: 15043 [2021-08-21 11:13:30,719 INFO L226 Difference]: Without dead ends: 14661 [2021-08-21 11:13:30,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1532 ImplicationChecksByTransitivity, 1218.0ms TimeCoverageRelationStatistics Valid=1047, Invalid=3509, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 11:13:30,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14661 states. [2021-08-21 11:13:30,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14661 to 7240. [2021-08-21 11:13:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7240 states, 7239 states have (on average 2.8412764193949442) internal successors, (20568), 7239 states have internal predecessors, (20568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:30,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7240 states to 7240 states and 20568 transitions. [2021-08-21 11:13:30,863 INFO L78 Accepts]: Start accepts. Automaton has 7240 states and 20568 transitions. Word has length 67 [2021-08-21 11:13:30,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:13:30,863 INFO L470 AbstractCegarLoop]: Abstraction has 7240 states and 20568 transitions. [2021-08-21 11:13:30,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:30,863 INFO L276 IsEmpty]: Start isEmpty. Operand 7240 states and 20568 transitions. [2021-08-21 11:13:30,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:13:30,872 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:13:30,872 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:13:30,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2021-08-21 11:13:31,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:13:31,072 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:13:31,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:13:31,073 INFO L82 PathProgramCache]: Analyzing trace with hash 40801163, now seen corresponding path program 107 times [2021-08-21 11:13:31,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:13:31,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520356675] [2021-08-21 11:13:31,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:13:31,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:13:31,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:13:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:31,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:13:31,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520356675] [2021-08-21 11:13:31,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520356675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:31,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186979896] [2021-08-21 11:13:31,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:13:31,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:13:31,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:13:31,259 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:13:31,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-21 11:13:38,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:13:38,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:13:38,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:13:38,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:13:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:38,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186979896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:38,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:13:38,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:13:38,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844416041] [2021-08-21 11:13:38,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:13:38,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:13:38,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:13:38,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:13:38,677 INFO L87 Difference]: Start difference. First operand 7240 states and 20568 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:39,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:13:39,957 INFO L93 Difference]: Finished difference Result 15318 states and 41586 transitions. [2021-08-21 11:13:39,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 11:13:39,957 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:13:39,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:13:39,982 INFO L225 Difference]: With dead ends: 15318 [2021-08-21 11:13:39,983 INFO L226 Difference]: Without dead ends: 14760 [2021-08-21 11:13:39,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 1151.5ms TimeCoverageRelationStatistics Valid=1027, Invalid=3803, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 11:13:40,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14760 states. [2021-08-21 11:13:40,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14760 to 7185. [2021-08-21 11:13:40,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7185 states, 7184 states have (on average 2.839922048997773) internal successors, (20402), 7184 states have internal predecessors, (20402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:40,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7185 states to 7185 states and 20402 transitions. [2021-08-21 11:13:40,151 INFO L78 Accepts]: Start accepts. Automaton has 7185 states and 20402 transitions. Word has length 67 [2021-08-21 11:13:40,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:13:40,151 INFO L470 AbstractCegarLoop]: Abstraction has 7185 states and 20402 transitions. [2021-08-21 11:13:40,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:40,151 INFO L276 IsEmpty]: Start isEmpty. Operand 7185 states and 20402 transitions. [2021-08-21 11:13:40,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:13:40,159 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:13:40,159 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:13:40,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-21 11:13:40,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:13:40,360 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:13:40,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:13:40,360 INFO L82 PathProgramCache]: Analyzing trace with hash -105833473, now seen corresponding path program 108 times [2021-08-21 11:13:40,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:13:40,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177486644] [2021-08-21 11:13:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:13:40,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:13:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:13:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:40,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:13:40,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177486644] [2021-08-21 11:13:40,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177486644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:40,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995992407] [2021-08-21 11:13:40,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:13:40,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:13:40,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:13:40,531 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:13:40,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-21 11:13:47,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 11:13:47,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:13:47,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:13:47,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:13:48,115 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:48,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995992407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:48,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:13:48,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:13:48,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613480616] [2021-08-21 11:13:48,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:13:48,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:13:48,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:13:48,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:13:48,116 INFO L87 Difference]: Start difference. First operand 7185 states and 20402 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:49,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:13:49,111 INFO L93 Difference]: Finished difference Result 13238 states and 35778 transitions. [2021-08-21 11:13:49,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 11:13:49,111 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:13:49,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:13:49,134 INFO L225 Difference]: With dead ends: 13238 [2021-08-21 11:13:49,134 INFO L226 Difference]: Without dead ends: 13086 [2021-08-21 11:13:49,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 932.3ms TimeCoverageRelationStatistics Valid=902, Invalid=2880, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 11:13:49,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13086 states. [2021-08-21 11:13:49,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13086 to 7610. [2021-08-21 11:13:49,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7610 states, 7609 states have (on average 2.860165593376265) internal successors, (21763), 7609 states have internal predecessors, (21763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:49,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7610 states to 7610 states and 21763 transitions. [2021-08-21 11:13:49,280 INFO L78 Accepts]: Start accepts. Automaton has 7610 states and 21763 transitions. Word has length 67 [2021-08-21 11:13:49,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:13:49,280 INFO L470 AbstractCegarLoop]: Abstraction has 7610 states and 21763 transitions. [2021-08-21 11:13:49,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:49,280 INFO L276 IsEmpty]: Start isEmpty. Operand 7610 states and 21763 transitions. [2021-08-21 11:13:49,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:13:49,289 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:13:49,290 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:13:49,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-08-21 11:13:49,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-08-21 11:13:49,490 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:13:49,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:13:49,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1869309827, now seen corresponding path program 109 times [2021-08-21 11:13:49,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:13:49,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848619175] [2021-08-21 11:13:49,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:13:49,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:13:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:13:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:49,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:13:49,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848619175] [2021-08-21 11:13:49,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848619175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:49,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595583674] [2021-08-21 11:13:49,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:13:49,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:13:49,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:13:49,674 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:13:49,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-21 11:13:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:13:56,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:13:56,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:13:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:57,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595583674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:57,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:13:57,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:13:57,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586045014] [2021-08-21 11:13:57,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:13:57,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:13:57,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:13:57,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:13:57,214 INFO L87 Difference]: Start difference. First operand 7610 states and 21763 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:58,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:13:58,469 INFO L93 Difference]: Finished difference Result 15619 states and 42912 transitions. [2021-08-21 11:13:58,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 11:13:58,469 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 11:13:58,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:13:58,495 INFO L225 Difference]: With dead ends: 15619 [2021-08-21 11:13:58,495 INFO L226 Difference]: Without dead ends: 15189 [2021-08-21 11:13:58,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 1134.0ms TimeCoverageRelationStatistics Valid=1111, Invalid=3859, Unknown=0, NotChecked=0, Total=4970 [2021-08-21 11:13:58,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15189 states. [2021-08-21 11:13:58,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15189 to 7502. [2021-08-21 11:13:58,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7502 states, 7501 states have (on average 2.8381549126783097) internal successors, (21289), 7501 states have internal predecessors, (21289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:58,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 21289 transitions. [2021-08-21 11:13:58,671 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 21289 transitions. Word has length 67 [2021-08-21 11:13:58,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:13:58,671 INFO L470 AbstractCegarLoop]: Abstraction has 7502 states and 21289 transitions. [2021-08-21 11:13:58,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:58,671 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 21289 transitions. [2021-08-21 11:13:58,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:13:58,680 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:13:58,680 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:13:58,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-08-21 11:13:58,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-21 11:13:58,880 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:13:58,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:13:58,881 INFO L82 PathProgramCache]: Analyzing trace with hash -718503737, now seen corresponding path program 110 times [2021-08-21 11:13:58,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:13:58,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258533420] [2021-08-21 11:13:58,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:13:58,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:13:58,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:13:59,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:59,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:13:59,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258533420] [2021-08-21 11:13:59,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258533420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:59,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338204114] [2021-08-21 11:13:59,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:13:59,096 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:13:59,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:13:59,097 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:13:59,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 11:14:02,251 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 11:14:02,293 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 11:14:03,254 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-21 11:14:03,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-08-21 11:14:03,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2021-08-21 11:14:03,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-21 11:14:03,455 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 68 with TraceHistMax 4,while executing Executor. [2021-08-21 11:14:03,456 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 11:14:03,456 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 11:14:03,460 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 11:14:03,460 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 11:14:03,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 11:14:03 BasicIcfg [2021-08-21 11:14:03,461 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 11:14:03,462 INFO L168 Benchmark]: Toolchain (without parser) took 689729.14 ms. Allocated memory was 188.7 MB in the beginning and 2.7 GB in the end (delta: 2.5 GB). Free memory was 151.8 MB in the beginning and 2.1 GB in the end (delta: -2.0 GB). Peak memory consumption was 2.9 GB. Max. memory is 8.0 GB. [2021-08-21 11:14:03,463 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 188.7 MB. Free memory was 170.2 MB in the beginning and 170.1 MB in the end (delta: 87.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 11:14:03,463 INFO L168 Benchmark]: CACSL2BoogieTranslator took 421.59 ms. Allocated memory is still 188.7 MB. Free memory was 151.5 MB in the beginning and 163.3 MB in the end (delta: -11.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-08-21 11:14:03,463 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.17 ms. Allocated memory is still 188.7 MB. Free memory was 163.3 MB in the beginning and 161.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 11:14:03,463 INFO L168 Benchmark]: Boogie Preprocessor took 32.91 ms. Allocated memory is still 188.7 MB. Free memory was 161.8 MB in the beginning and 160.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 11:14:03,464 INFO L168 Benchmark]: RCFGBuilder took 514.84 ms. Allocated memory is still 188.7 MB. Free memory was 160.2 MB in the beginning and 138.2 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-08-21 11:14:03,464 INFO L168 Benchmark]: TraceAbstraction took 688702.00 ms. Allocated memory was 188.7 MB in the beginning and 2.7 GB in the end (delta: 2.5 GB). Free memory was 137.7 MB in the beginning and 2.1 GB in the end (delta: -2.0 GB). Peak memory consumption was 2.9 GB. Max. memory is 8.0 GB. [2021-08-21 11:14:03,465 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 188.7 MB. Free memory was 170.2 MB in the beginning and 170.1 MB in the end (delta: 87.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 421.59 ms. Allocated memory is still 188.7 MB. Free memory was 151.5 MB in the beginning and 163.3 MB in the end (delta: -11.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 51.17 ms. Allocated memory is still 188.7 MB. Free memory was 163.3 MB in the beginning and 161.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.91 ms. Allocated memory is still 188.7 MB. Free memory was 161.8 MB in the beginning and 160.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 514.84 ms. Allocated memory is still 188.7 MB. Free memory was 160.2 MB in the beginning and 138.2 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 688702.00 ms. Allocated memory was 188.7 MB in the beginning and 2.7 GB in the end (delta: 2.5 GB). Free memory was 137.7 MB in the beginning and 2.1 GB in the end (delta: -2.0 GB). Peak memory consumption was 2.9 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 731]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was analyzing trace of length 68 with TraceHistMax 4,while executing Executor. - TimeoutResultAtElement [Line: 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 68 with TraceHistMax 4,while executing Executor. - TimeoutResultAtElement [Line: 722]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 68 with TraceHistMax 4,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 688570.9ms, OverallIterations: 146, TraceHistogramMax: 6, EmptinessCheckTime: 796.5ms, AutomataDifference: 87875.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 82.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13222 SDtfs, 130589 SDslu, 157559 SDs, 0 SdLazy, 26302 SolverSat, 9442 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15682.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13512 GetRequests, 7455 SyntacticMatches, 64 SemanticMatches, 5993 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88825 ImplicationChecksByTransitivity, 81925.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7610occurred in iteration=144, InterpolantAutomatonStates: 4938, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 12013.0ms AutomataMinimizationTime, 145 MinimizatonAttempts, 446558 StatesRemovedByMinimization, 145 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1425.9ms SsaConstructionTime, 3208.5ms SatisfiabilityAnalysisTime, 87047.7ms InterpolantComputationTime, 17331 NumberOfCodeBlocks, 17331 NumberOfCodeBlocksAsserted, 540 NumberOfCheckSat, 17048 ConstructedInterpolants, 5 QuantifiedInterpolants, 143265 SizeOfPredicates, 276 NumberOfNonLiveVariables, 21212 ConjunctsInSsa, 1789 ConjunctsInUnsatCore, 283 InterpolantComputations, 7 PerfectInterpolantSequences, 0/6688 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