/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-bf4350c [2020-09-16 13:53:45,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-16 13:53:45,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-16 13:53:45,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-16 13:53:45,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-16 13:53:45,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-16 13:53:45,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-16 13:53:45,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-16 13:53:45,739 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-16 13:53:45,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-16 13:53:45,744 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-16 13:53:45,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-16 13:53:45,747 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-16 13:53:45,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-16 13:53:45,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-16 13:53:45,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-16 13:53:45,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-16 13:53:45,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-16 13:53:45,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-16 13:53:45,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-16 13:53:45,771 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-16 13:53:45,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-16 13:53:45,774 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-16 13:53:45,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-16 13:53:45,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-16 13:53:45,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-16 13:53:45,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-16 13:53:45,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-16 13:53:45,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-16 13:53:45,798 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-16 13:53:45,798 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-16 13:53:45,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-16 13:53:45,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-16 13:53:45,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-16 13:53:45,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-16 13:53:45,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-16 13:53:45,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-16 13:53:45,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-16 13:53:45,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-16 13:53:45,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-16 13:53:45,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-16 13:53:45,812 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-16 13:53:45,863 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-16 13:53:45,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-16 13:53:45,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-16 13:53:45,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-16 13:53:45,866 INFO L138 SettingsManager]: * Use SBE=true [2020-09-16 13:53:45,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-16 13:53:45,867 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-16 13:53:45,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-16 13:53:45,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-16 13:53:45,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-16 13:53:45,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-16 13:53:45,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-16 13:53:45,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-16 13:53:45,869 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-16 13:53:45,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-16 13:53:45,870 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-16 13:53:45,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-16 13:53:45,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-16 13:53:45,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-16 13:53:45,870 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-16 13:53:45,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-16 13:53:45,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-16 13:53:45,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-16 13:53:45,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-16 13:53:45,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-16 13:53:45,872 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-16 13:53:45,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-16 13:53:45,872 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-16 13:53:45,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-16 13:53:45,872 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-16 13:53:47,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-16 13:53:47,199 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-16 13:53:47,203 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-16 13:53:47,204 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-16 13:53:47,205 INFO L275 PluginConnector]: CDTParser initialized [2020-09-16 13:53:47,206 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-09-16 13:53:47,298 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4256e4d7e/1f977064648940df9300acb9e02fd301/FLAG120a57c82 [2020-09-16 13:53:47,966 INFO L306 CDTParser]: Found 1 translation units. [2020-09-16 13:53:47,967 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-09-16 13:53:47,983 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4256e4d7e/1f977064648940df9300acb9e02fd301/FLAG120a57c82 [2020-09-16 13:53:48,214 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4256e4d7e/1f977064648940df9300acb9e02fd301 [2020-09-16 13:53:48,226 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-16 13:53:48,233 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-16 13:53:48,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-16 13:53:48,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-16 13:53:48,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-16 13:53:48,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 01:53:48" (1/1) ... [2020-09-16 13:53:48,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bb42b61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:48, skipping insertion in model container [2020-09-16 13:53:48,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 01:53:48" (1/1) ... [2020-09-16 13:53:48,250 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-16 13:53:48,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-16 13:53:48,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-16 13:53:48,821 INFO L203 MainTranslator]: Completed pre-run [2020-09-16 13:53:48,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-16 13:53:48,978 INFO L208 MainTranslator]: Completed translation [2020-09-16 13:53:48,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:48 WrapperNode [2020-09-16 13:53:48,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-16 13:53:48,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-16 13:53:48,980 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-16 13:53:48,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-16 13:53:48,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:48" (1/1) ... [2020-09-16 13:53:49,011 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:48" (1/1) ... [2020-09-16 13:53:49,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-16 13:53:49,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-16 13:53:49,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-16 13:53:49,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-16 13:53:49,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:48" (1/1) ... [2020-09-16 13:53:49,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:48" (1/1) ... [2020-09-16 13:53:49,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:48" (1/1) ... [2020-09-16 13:53:49,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:48" (1/1) ... [2020-09-16 13:53:49,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:48" (1/1) ... [2020-09-16 13:53:49,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:48" (1/1) ... [2020-09-16 13:53:49,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:48" (1/1) ... [2020-09-16 13:53:49,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-16 13:53:49,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-16 13:53:49,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-16 13:53:49,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-16 13:53:49,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-16 13:53:49,166 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-16 13:53:49,166 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-16 13:53:49,167 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-16 13:53:49,167 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-16 13:53:49,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-16 13:53:49,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-16 13:53:49,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-16 13:53:49,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-16 13:53:49,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-16 13:53:49,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-16 13:53:49,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-16 13:53:49,173 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-16 13:53:49,535 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-16 13:53:49,536 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-16 13:53:49,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 01:53:49 BoogieIcfgContainer [2020-09-16 13:53:49,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-16 13:53:49,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-16 13:53:49,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-16 13:53:49,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-16 13:53:49,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 01:53:48" (1/3) ... [2020-09-16 13:53:49,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2363ca91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 01:53:49, skipping insertion in model container [2020-09-16 13:53:49,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:48" (2/3) ... [2020-09-16 13:53:49,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2363ca91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 01:53:49, skipping insertion in model container [2020-09-16 13:53:49,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 01:53:49" (3/3) ... [2020-09-16 13:53:49,550 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2020-09-16 13:53:49,560 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-16 13:53:49,560 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-16 13:53:49,570 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-16 13:53:49,571 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-16 13:53:49,605 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,605 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,605 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,606 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,606 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,606 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,607 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,607 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,607 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,608 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,608 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,608 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,609 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,609 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,609 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,610 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,610 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,610 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,610 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,611 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,611 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,611 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,612 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,612 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,612 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,613 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,613 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,613 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,613 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,618 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,619 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,619 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,619 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,620 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,620 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,627 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,627 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,627 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,628 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,628 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,628 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,652 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-16 13:53:49,676 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-16 13:53:49,676 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-16 13:53:49,676 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-16 13:53:49,677 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-16 13:53:49,677 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-16 13:53:49,677 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-16 13:53:49,677 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-16 13:53:49,677 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-16 13:53:49,698 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-09-16 13:53:49,701 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-16 13:53:49,753 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-16 13:53:49,753 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-16 13:53:49,762 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-09-16 13:53:49,766 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-16 13:53:49,790 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-16 13:53:49,791 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-16 13:53:49,792 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-09-16 13:53:49,796 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-09-16 13:53:49,798 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-16 13:53:51,157 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-09-16 13:53:51,296 INFO L206 etLargeBlockEncoding]: Checked pairs total: 988 [2020-09-16 13:53:51,296 INFO L214 etLargeBlockEncoding]: Total number of compositions: 47 [2020-09-16 13:53:51,303 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-16 13:53:51,318 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-16 13:53:51,321 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-16 13:53:51,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-16 13:53:51,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:51,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-16 13:53:51,333 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:51,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:51,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1563716626, now seen corresponding path program 1 times [2020-09-16 13:53:51,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:51,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565803035] [2020-09-16 13:53:51,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:51,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:51,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565803035] [2020-09-16 13:53:51,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 13:53:51,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-16 13:53:51,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324814761] [2020-09-16 13:53:51,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-16 13:53:51,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:51,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-16 13:53:51,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-16 13:53:51,650 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-16 13:53:51,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:51,725 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-09-16 13:53:51,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-16 13:53:51,727 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-16 13:53:51,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:51,743 INFO L225 Difference]: With dead ends: 83 [2020-09-16 13:53:51,743 INFO L226 Difference]: Without dead ends: 54 [2020-09-16 13:53:51,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-16 13:53:51,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-16 13:53:51,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-09-16 13:53:51,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-16 13:53:51,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-09-16 13:53:51,797 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-09-16 13:53:51,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:51,798 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-09-16 13:53:51,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-16 13:53:51,798 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-09-16 13:53:51,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-16 13:53:51,799 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:51,800 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:51,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-16 13:53:51,800 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:51,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:51,801 INFO L82 PathProgramCache]: Analyzing trace with hash 956938306, now seen corresponding path program 1 times [2020-09-16 13:53:51,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:51,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865672563] [2020-09-16 13:53:51,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:51,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865672563] [2020-09-16 13:53:51,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 13:53:51,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-16 13:53:51,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049032914] [2020-09-16 13:53:51,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-16 13:53:51,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:51,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-16 13:53:51,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-16 13:53:51,934 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-09-16 13:53:51,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:51,990 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-09-16 13:53:51,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-16 13:53:51,991 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-16 13:53:51,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:51,992 INFO L225 Difference]: With dead ends: 80 [2020-09-16 13:53:51,993 INFO L226 Difference]: Without dead ends: 75 [2020-09-16 13:53:51,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-16 13:53:51,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-16 13:53:52,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-09-16 13:53:52,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-16 13:53:52,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-09-16 13:53:52,004 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-09-16 13:53:52,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:52,006 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-09-16 13:53:52,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-16 13:53:52,006 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-09-16 13:53:52,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-16 13:53:52,007 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:52,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:52,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-16 13:53:52,008 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:52,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:52,008 INFO L82 PathProgramCache]: Analyzing trace with hash 507192011, now seen corresponding path program 1 times [2020-09-16 13:53:52,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:52,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479929967] [2020-09-16 13:53:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:52,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479929967] [2020-09-16 13:53:52,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 13:53:52,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-16 13:53:52,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111598606] [2020-09-16 13:53:52,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-16 13:53:52,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:52,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-16 13:53:52,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-16 13:53:52,145 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-09-16 13:53:52,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:52,176 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-09-16 13:53:52,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-16 13:53:52,177 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-16 13:53:52,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:52,178 INFO L225 Difference]: With dead ends: 73 [2020-09-16 13:53:52,178 INFO L226 Difference]: Without dead ends: 70 [2020-09-16 13:53:52,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-16 13:53:52,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-16 13:53:52,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-16 13:53:52,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-16 13:53:52,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-09-16 13:53:52,189 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-09-16 13:53:52,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:52,189 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-09-16 13:53:52,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-16 13:53:52,190 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-09-16 13:53:52,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-16 13:53:52,191 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:52,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:52,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-16 13:53:52,192 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:52,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:52,192 INFO L82 PathProgramCache]: Analyzing trace with hash 507214331, now seen corresponding path program 2 times [2020-09-16 13:53:52,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:52,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218167672] [2020-09-16 13:53:52,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:52,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218167672] [2020-09-16 13:53:52,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 13:53:52,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-16 13:53:52,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401490641] [2020-09-16 13:53:52,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-16 13:53:52,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:52,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-16 13:53:52,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-16 13:53:52,294 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-09-16 13:53:52,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:52,360 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-09-16 13:53:52,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-16 13:53:52,361 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-16 13:53:52,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:52,363 INFO L225 Difference]: With dead ends: 86 [2020-09-16 13:53:52,363 INFO L226 Difference]: Without dead ends: 80 [2020-09-16 13:53:52,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-16 13:53:52,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-16 13:53:52,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-09-16 13:53:52,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-16 13:53:52,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-09-16 13:53:52,374 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-09-16 13:53:52,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:52,375 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-09-16 13:53:52,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-16 13:53:52,375 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-09-16 13:53:52,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-16 13:53:52,376 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:52,376 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:52,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-16 13:53:52,377 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:52,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:52,377 INFO L82 PathProgramCache]: Analyzing trace with hash -399661872, now seen corresponding path program 2 times [2020-09-16 13:53:52,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:52,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886670590] [2020-09-16 13:53:52,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:52,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:52,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886670590] [2020-09-16 13:53:52,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060326522] [2020-09-16 13:53:52,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:52,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:53:52,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:53:52,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 13:53:52,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:52,646 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:53:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:52,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:52,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-09-16 13:53:52,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617796608] [2020-09-16 13:53:52,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-16 13:53:52,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:52,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-16 13:53:52,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-16 13:53:52,674 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-09-16 13:53:52,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:52,765 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-09-16 13:53:52,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 13:53:52,766 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-09-16 13:53:52,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:52,768 INFO L225 Difference]: With dead ends: 101 [2020-09-16 13:53:52,768 INFO L226 Difference]: Without dead ends: 96 [2020-09-16 13:53:52,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:53:52,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-16 13:53:52,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-09-16 13:53:52,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-16 13:53:52,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-09-16 13:53:52,781 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-09-16 13:53:52,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:52,781 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-09-16 13:53:52,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-16 13:53:52,782 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-09-16 13:53:52,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-16 13:53:52,783 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:52,783 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:52,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:52,999 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:52,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:53,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1456916488, now seen corresponding path program 3 times [2020-09-16 13:53:53,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:53,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926708459] [2020-09-16 13:53:53,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:53,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926708459] [2020-09-16 13:53:53,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441282897] [2020-09-16 13:53:53,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:53,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:53:53,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:53:53,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 13:53:53,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:53,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:53,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-16 13:53:53,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067112710] [2020-09-16 13:53:53,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 13:53:53,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:53,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 13:53:53,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-16 13:53:53,216 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-09-16 13:53:53,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:53,258 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-16 13:53:53,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-16 13:53:53,258 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-16 13:53:53,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:53,259 INFO L225 Difference]: With dead ends: 84 [2020-09-16 13:53:53,260 INFO L226 Difference]: Without dead ends: 81 [2020-09-16 13:53:53,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-16 13:53:53,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-16 13:53:53,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-09-16 13:53:53,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-16 13:53:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-09-16 13:53:53,268 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-09-16 13:53:53,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:53,269 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-09-16 13:53:53,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 13:53:53,269 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-09-16 13:53:53,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-16 13:53:53,270 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:53,270 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:53,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:53,486 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:53,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:53,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1456224568, now seen corresponding path program 4 times [2020-09-16 13:53:53,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:53,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510445620] [2020-09-16 13:53:53,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:53,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:53,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510445620] [2020-09-16 13:53:53,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686748390] [2020-09-16 13:53:53,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:53,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:53:53,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:53:53,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 13:53:53,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:53,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:53,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-16 13:53:53,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454095518] [2020-09-16 13:53:53,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 13:53:53,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:53,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 13:53:53,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-16 13:53:53,713 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-09-16 13:53:53,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:53,766 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-09-16 13:53:53,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-16 13:53:53,767 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-16 13:53:53,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:53,768 INFO L225 Difference]: With dead ends: 90 [2020-09-16 13:53:53,768 INFO L226 Difference]: Without dead ends: 87 [2020-09-16 13:53:53,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-09-16 13:53:53,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-16 13:53:53,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-09-16 13:53:53,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-16 13:53:53,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-09-16 13:53:53,776 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-09-16 13:53:53,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:53,777 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-09-16 13:53:53,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 13:53:53,777 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-09-16 13:53:53,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-16 13:53:53,778 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:53,778 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:53,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:53,993 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:53,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:53,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1456202248, now seen corresponding path program 5 times [2020-09-16 13:53:53,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:53,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051695903] [2020-09-16 13:53:53,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:54,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051695903] [2020-09-16 13:53:54,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031324893] [2020-09-16 13:53:54,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:54,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:53:54,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:53:54,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 13:53:54,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:54,186 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:53:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:54,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:54,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-16 13:53:54,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081571896] [2020-09-16 13:53:54,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 13:53:54,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:54,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 13:53:54,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-16 13:53:54,210 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-09-16 13:53:54,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:54,318 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-09-16 13:53:54,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 13:53:54,319 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-16 13:53:54,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:54,320 INFO L225 Difference]: With dead ends: 99 [2020-09-16 13:53:54,320 INFO L226 Difference]: Without dead ends: 93 [2020-09-16 13:53:54,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-09-16 13:53:54,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-16 13:53:54,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-09-16 13:53:54,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-16 13:53:54,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-09-16 13:53:54,328 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-09-16 13:53:54,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:54,328 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-09-16 13:53:54,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 13:53:54,329 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-09-16 13:53:54,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 13:53:54,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:54,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:54,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:54,543 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:54,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:54,544 INFO L82 PathProgramCache]: Analyzing trace with hash 483638869, now seen corresponding path program 1 times [2020-09-16 13:53:54,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:54,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537756939] [2020-09-16 13:53:54,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:54,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537756939] [2020-09-16 13:53:54,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 13:53:54,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-16 13:53:54,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313094048] [2020-09-16 13:53:54,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-16 13:53:54,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:54,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-16 13:53:54,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-16 13:53:54,620 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-09-16 13:53:54,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:54,651 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-09-16 13:53:54,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-16 13:53:54,652 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-16 13:53:54,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:54,653 INFO L225 Difference]: With dead ends: 92 [2020-09-16 13:53:54,653 INFO L226 Difference]: Without dead ends: 90 [2020-09-16 13:53:54,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-16 13:53:54,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-16 13:53:54,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-09-16 13:53:54,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-16 13:53:54,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-09-16 13:53:54,660 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-09-16 13:53:54,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:54,661 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-09-16 13:53:54,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-16 13:53:54,661 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-09-16 13:53:54,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 13:53:54,662 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:54,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:54,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-16 13:53:54,663 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:54,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:54,663 INFO L82 PathProgramCache]: Analyzing trace with hash 484301959, now seen corresponding path program 2 times [2020-09-16 13:53:54,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:54,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906438800] [2020-09-16 13:53:54,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:54,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906438800] [2020-09-16 13:53:54,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 13:53:54,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-16 13:53:54,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124288721] [2020-09-16 13:53:54,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-16 13:53:54,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:54,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-16 13:53:54,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-16 13:53:54,748 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-09-16 13:53:54,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:54,807 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-09-16 13:53:54,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-16 13:53:54,807 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-16 13:53:54,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:54,809 INFO L225 Difference]: With dead ends: 100 [2020-09-16 13:53:54,809 INFO L226 Difference]: Without dead ends: 98 [2020-09-16 13:53:54,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-16 13:53:54,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-16 13:53:54,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-09-16 13:53:54,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-16 13:53:54,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-09-16 13:53:54,815 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-09-16 13:53:54,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:54,815 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-09-16 13:53:54,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-16 13:53:54,815 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-09-16 13:53:54,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 13:53:54,816 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:54,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:54,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-16 13:53:54,817 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:54,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:54,817 INFO L82 PathProgramCache]: Analyzing trace with hash 484324279, now seen corresponding path program 3 times [2020-09-16 13:53:54,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:54,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080628121] [2020-09-16 13:53:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:54,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080628121] [2020-09-16 13:53:54,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 13:53:54,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-16 13:53:54,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195167737] [2020-09-16 13:53:54,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-16 13:53:54,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:54,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-16 13:53:54,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-16 13:53:54,956 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-09-16 13:53:55,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:55,039 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-16 13:53:55,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 13:53:55,040 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-16 13:53:55,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:55,041 INFO L225 Difference]: With dead ends: 105 [2020-09-16 13:53:55,041 INFO L226 Difference]: Without dead ends: 100 [2020-09-16 13:53:55,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-16 13:53:55,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-16 13:53:55,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-16 13:53:55,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-16 13:53:55,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-09-16 13:53:55,052 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-09-16 13:53:55,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:55,052 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-09-16 13:53:55,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-16 13:53:55,052 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-09-16 13:53:55,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 13:53:55,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:55,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:55,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-16 13:53:55,057 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:55,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:55,057 INFO L82 PathProgramCache]: Analyzing trace with hash 484353109, now seen corresponding path program 4 times [2020-09-16 13:53:55,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:55,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607216717] [2020-09-16 13:53:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:55,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:55,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607216717] [2020-09-16 13:53:55,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 13:53:55,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-16 13:53:55,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484193553] [2020-09-16 13:53:55,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-16 13:53:55,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:55,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-16 13:53:55,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-16 13:53:55,140 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-09-16 13:53:55,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:55,222 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-16 13:53:55,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 13:53:55,223 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-16 13:53:55,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:55,224 INFO L225 Difference]: With dead ends: 105 [2020-09-16 13:53:55,224 INFO L226 Difference]: Without dead ends: 100 [2020-09-16 13:53:55,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-16 13:53:55,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-16 13:53:55,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-16 13:53:55,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-16 13:53:55,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-09-16 13:53:55,230 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-09-16 13:53:55,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:55,231 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-09-16 13:53:55,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-16 13:53:55,231 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-09-16 13:53:55,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 13:53:55,232 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:55,232 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:55,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-16 13:53:55,233 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:55,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:55,233 INFO L82 PathProgramCache]: Analyzing trace with hash 495405570, now seen corresponding path program 3 times [2020-09-16 13:53:55,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:55,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274062684] [2020-09-16 13:53:55,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:55,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274062684] [2020-09-16 13:53:55,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094574691] [2020-09-16 13:53:55,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:55,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:53:55,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:53:55,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:53:55,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:55,488 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:53:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:55,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:55,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-16 13:53:55,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010094938] [2020-09-16 13:53:55,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 13:53:55,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:55,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 13:53:55,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-09-16 13:53:55,513 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-09-16 13:53:55,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:55,624 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-09-16 13:53:55,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:53:55,625 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-09-16 13:53:55,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:55,626 INFO L225 Difference]: With dead ends: 122 [2020-09-16 13:53:55,627 INFO L226 Difference]: Without dead ends: 117 [2020-09-16 13:53:55,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-16 13:53:55,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-16 13:53:55,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-09-16 13:53:55,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-16 13:53:55,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-09-16 13:53:55,632 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-09-16 13:53:55,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:55,632 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-09-16 13:53:55,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 13:53:55,632 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-09-16 13:53:55,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 13:53:55,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:55,633 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:55,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-16 13:53:55,844 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:55,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:55,845 INFO L82 PathProgramCache]: Analyzing trace with hash 2080229483, now seen corresponding path program 6 times [2020-09-16 13:53:55,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:55,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279299652] [2020-09-16 13:53:55,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:55,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:55,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279299652] [2020-09-16 13:53:55,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903296538] [2020-09-16 13:53:55,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:56,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:53:56,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:53:56,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:53:56,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:56,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:56,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:56,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:53:56,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153872740] [2020-09-16 13:53:56,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:53:56,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:56,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:53:56,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:53:56,110 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-09-16 13:53:56,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:56,165 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-16 13:53:56,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-16 13:53:56,166 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-16 13:53:56,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:56,168 INFO L225 Difference]: With dead ends: 108 [2020-09-16 13:53:56,168 INFO L226 Difference]: Without dead ends: 105 [2020-09-16 13:53:56,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:53:56,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-16 13:53:56,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-09-16 13:53:56,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-16 13:53:56,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-09-16 13:53:56,173 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-09-16 13:53:56,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:56,173 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-09-16 13:53:56,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:53:56,173 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-09-16 13:53:56,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 13:53:56,174 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:56,174 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:56,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:56,387 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:56,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:56,387 INFO L82 PathProgramCache]: Analyzing trace with hash 2101679003, now seen corresponding path program 7 times [2020-09-16 13:53:56,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:56,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836241688] [2020-09-16 13:53:56,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:56,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:56,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836241688] [2020-09-16 13:53:56,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529003193] [2020-09-16 13:53:56,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:56,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:53:56,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:56,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:56,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:53:56,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213192061] [2020-09-16 13:53:56,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:53:56,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:56,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:53:56,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:53:56,641 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-09-16 13:53:56,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:56,710 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-09-16 13:53:56,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 13:53:56,711 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-16 13:53:56,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:56,712 INFO L225 Difference]: With dead ends: 116 [2020-09-16 13:53:56,713 INFO L226 Difference]: Without dead ends: 113 [2020-09-16 13:53:56,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-16 13:53:56,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-16 13:53:56,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-09-16 13:53:56,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-16 13:53:56,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-09-16 13:53:56,719 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-09-16 13:53:56,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:56,719 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-09-16 13:53:56,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:53:56,720 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-09-16 13:53:56,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 13:53:56,721 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:56,721 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:56,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-16 13:53:56,934 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:56,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:56,935 INFO L82 PathProgramCache]: Analyzing trace with hash 2102370923, now seen corresponding path program 8 times [2020-09-16 13:53:56,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:56,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978763296] [2020-09-16 13:53:56,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:57,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978763296] [2020-09-16 13:53:57,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390951943] [2020-09-16 13:53:57,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:57,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:53:57,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:53:57,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:53:57,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:57,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:57,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:53:57,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378869268] [2020-09-16 13:53:57,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:53:57,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:57,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:53:57,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:53:57,142 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-09-16 13:53:57,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:57,235 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-09-16 13:53:57,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 13:53:57,236 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-16 13:53:57,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:57,237 INFO L225 Difference]: With dead ends: 115 [2020-09-16 13:53:57,237 INFO L226 Difference]: Without dead ends: 112 [2020-09-16 13:53:57,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:53:57,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-16 13:53:57,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-09-16 13:53:57,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-16 13:53:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-09-16 13:53:57,243 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-09-16 13:53:57,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:57,243 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-09-16 13:53:57,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:53:57,244 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-09-16 13:53:57,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 13:53:57,244 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:57,245 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:57,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-16 13:53:57,459 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:57,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:57,460 INFO L82 PathProgramCache]: Analyzing trace with hash 2102393243, now seen corresponding path program 9 times [2020-09-16 13:53:57,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:57,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085221630] [2020-09-16 13:53:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:57,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085221630] [2020-09-16 13:53:57,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963334911] [2020-09-16 13:53:57,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:57,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:53:57,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:53:57,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:53:57,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:57,678 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:53:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:57,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:57,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:53:57,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116825335] [2020-09-16 13:53:57,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:53:57,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:57,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:53:57,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:53:57,700 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-09-16 13:53:57,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:57,813 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-09-16 13:53:57,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:53:57,814 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-16 13:53:57,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:57,815 INFO L225 Difference]: With dead ends: 124 [2020-09-16 13:53:57,815 INFO L226 Difference]: Without dead ends: 118 [2020-09-16 13:53:57,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:53:57,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-16 13:53:57,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-09-16 13:53:57,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-16 13:53:57,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-09-16 13:53:57,820 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-09-16 13:53:57,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:57,820 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-09-16 13:53:57,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:53:57,821 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-09-16 13:53:57,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:53:57,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:57,821 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:58,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-16 13:53:58,022 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:58,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:58,023 INFO L82 PathProgramCache]: Analyzing trace with hash 2107902445, now seen corresponding path program 5 times [2020-09-16 13:53:58,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:58,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491277789] [2020-09-16 13:53:58,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:58,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:58,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:58,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491277789] [2020-09-16 13:53:58,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089515331] [2020-09-16 13:53:58,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:58,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:53:58,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:53:58,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:53:58,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:58,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:58,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:58,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:53:58,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629220398] [2020-09-16 13:53:58,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:53:58,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:58,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:53:58,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:53:58,269 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-09-16 13:53:58,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:58,319 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-09-16 13:53:58,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-16 13:53:58,320 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:53:58,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:58,321 INFO L225 Difference]: With dead ends: 113 [2020-09-16 13:53:58,321 INFO L226 Difference]: Without dead ends: 111 [2020-09-16 13:53:58,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:53:58,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-16 13:53:58,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-09-16 13:53:58,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-16 13:53:58,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-09-16 13:53:58,325 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-09-16 13:53:58,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:58,326 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-09-16 13:53:58,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:53:58,326 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-09-16 13:53:58,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:53:58,326 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:58,327 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:58,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-16 13:53:58,528 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:58,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:58,529 INFO L82 PathProgramCache]: Analyzing trace with hash 2107903406, now seen corresponding path program 6 times [2020-09-16 13:53:58,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:58,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125864590] [2020-09-16 13:53:58,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:58,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125864590] [2020-09-16 13:53:58,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814670499] [2020-09-16 13:53:58,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:58,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:53:58,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:53:58,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:53:58,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:58,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:58,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:53:58,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875870770] [2020-09-16 13:53:58,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:53:58,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:58,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:53:58,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:53:58,757 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-09-16 13:53:58,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:58,869 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-09-16 13:53:58,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 13:53:58,870 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:53:58,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:58,871 INFO L225 Difference]: With dead ends: 118 [2020-09-16 13:53:58,872 INFO L226 Difference]: Without dead ends: 116 [2020-09-16 13:53:58,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:53:58,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-16 13:53:58,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-09-16 13:53:58,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-16 13:53:58,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-09-16 13:53:58,878 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-09-16 13:53:58,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:58,878 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-09-16 13:53:58,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:53:58,878 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-09-16 13:53:58,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:53:58,879 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:58,879 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:59,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:59,092 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:59,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:59,093 INFO L82 PathProgramCache]: Analyzing trace with hash 2107932236, now seen corresponding path program 7 times [2020-09-16 13:53:59,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:59,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176165342] [2020-09-16 13:53:59,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:59,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176165342] [2020-09-16 13:53:59,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420317940] [2020-09-16 13:53:59,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:59,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:53:59,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:59,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:59,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:53:59,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057407819] [2020-09-16 13:53:59,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:53:59,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:59,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:53:59,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:53:59,336 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-09-16 13:53:59,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:59,436 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-09-16 13:53:59,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 13:53:59,438 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:53:59,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:59,439 INFO L225 Difference]: With dead ends: 119 [2020-09-16 13:53:59,439 INFO L226 Difference]: Without dead ends: 117 [2020-09-16 13:53:59,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:53:59,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-16 13:53:59,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-09-16 13:53:59,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-16 13:53:59,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-09-16 13:53:59,444 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-09-16 13:53:59,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:59,444 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-09-16 13:53:59,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:53:59,445 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-09-16 13:53:59,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:53:59,445 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:59,445 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:59,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:59,657 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:59,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:59,657 INFO L82 PathProgramCache]: Analyzing trace with hash 2128458235, now seen corresponding path program 8 times [2020-09-16 13:53:59,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:59,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231293378] [2020-09-16 13:53:59,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:59,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231293378] [2020-09-16 13:53:59,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626264503] [2020-09-16 13:53:59,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:59,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:53:59,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:53:59,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:53:59,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:59,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:59,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:53:59,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508682340] [2020-09-16 13:53:59,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:53:59,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:59,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:53:59,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:53:59,881 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-09-16 13:53:59,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:59,950 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-09-16 13:53:59,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 13:53:59,950 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:53:59,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:59,951 INFO L225 Difference]: With dead ends: 122 [2020-09-16 13:53:59,951 INFO L226 Difference]: Without dead ends: 120 [2020-09-16 13:53:59,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-16 13:53:59,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-16 13:53:59,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-09-16 13:53:59,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-16 13:53:59,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-09-16 13:53:59,957 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-09-16 13:53:59,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:59,957 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-09-16 13:53:59,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:53:59,957 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-09-16 13:53:59,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:53:59,958 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:59,958 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:00,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-16 13:54:00,159 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:00,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:00,160 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459196, now seen corresponding path program 9 times [2020-09-16 13:54:00,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:00,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915501947] [2020-09-16 13:54:00,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:00,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915501947] [2020-09-16 13:54:00,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406479609] [2020-09-16 13:54:00,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:00,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:54:00,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:00,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:54:00,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:00,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:00,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:54:00,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804415417] [2020-09-16 13:54:00,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:54:00,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:00,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:54:00,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:54:00,370 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-09-16 13:54:00,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:00,479 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-09-16 13:54:00,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:54:00,479 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:54:00,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:00,480 INFO L225 Difference]: With dead ends: 123 [2020-09-16 13:54:00,481 INFO L226 Difference]: Without dead ends: 121 [2020-09-16 13:54:00,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-16 13:54:00,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-16 13:54:00,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-09-16 13:54:00,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-16 13:54:00,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-09-16 13:54:00,488 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-09-16 13:54:00,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:00,488 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-09-16 13:54:00,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:54:00,489 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-09-16 13:54:00,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:00,489 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:00,489 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:00,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:00,690 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:00,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:00,691 INFO L82 PathProgramCache]: Analyzing trace with hash 2129121325, now seen corresponding path program 10 times [2020-09-16 13:54:00,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:00,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656733238] [2020-09-16 13:54:00,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:00,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656733238] [2020-09-16 13:54:00,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904791361] [2020-09-16 13:54:00,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:00,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:00,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:00,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:54:00,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:00,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:00,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:54:00,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923000226] [2020-09-16 13:54:00,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:54:00,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:00,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:54:00,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:54:00,895 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-09-16 13:54:00,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:00,986 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-16 13:54:00,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 13:54:00,987 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:54:00,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:00,988 INFO L225 Difference]: With dead ends: 123 [2020-09-16 13:54:00,988 INFO L226 Difference]: Without dead ends: 121 [2020-09-16 13:54:00,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:00,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-16 13:54:00,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-09-16 13:54:00,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-16 13:54:00,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-09-16 13:54:00,993 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-09-16 13:54:00,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:00,993 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-09-16 13:54:00,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:54:00,993 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-09-16 13:54:00,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:00,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:00,994 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:01,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-16 13:54:01,206 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:01,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:01,207 INFO L82 PathProgramCache]: Analyzing trace with hash 2129143645, now seen corresponding path program 11 times [2020-09-16 13:54:01,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:01,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625712193] [2020-09-16 13:54:01,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:01,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625712193] [2020-09-16 13:54:01,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389340297] [2020-09-16 13:54:01,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:01,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:01,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:01,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:54:01,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:01,419 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:01,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:01,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:54:01,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289190747] [2020-09-16 13:54:01,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:54:01,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:01,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:54:01,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:54:01,468 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-09-16 13:54:01,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:01,660 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-09-16 13:54:01,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:54:01,660 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:54:01,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:01,661 INFO L225 Difference]: With dead ends: 133 [2020-09-16 13:54:01,661 INFO L226 Difference]: Without dead ends: 128 [2020-09-16 13:54:01,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:54:01,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-16 13:54:01,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-09-16 13:54:01,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-16 13:54:01,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-09-16 13:54:01,667 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-09-16 13:54:01,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:01,667 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-09-16 13:54:01,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:54:01,667 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-09-16 13:54:01,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:01,668 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:01,668 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:01,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:01,878 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:01,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:01,879 INFO L82 PathProgramCache]: Analyzing trace with hash 2129151116, now seen corresponding path program 12 times [2020-09-16 13:54:01,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:01,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568482714] [2020-09-16 13:54:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:01,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568482714] [2020-09-16 13:54:01,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173369437] [2020-09-16 13:54:01,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:02,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:54:02,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:02,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:54:02,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:02,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:02,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:54:02,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133336749] [2020-09-16 13:54:02,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:54:02,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:02,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:54:02,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:54:02,097 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-09-16 13:54:02,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:02,229 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-09-16 13:54:02,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:54:02,230 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:54:02,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:02,231 INFO L225 Difference]: With dead ends: 127 [2020-09-16 13:54:02,231 INFO L226 Difference]: Without dead ends: 125 [2020-09-16 13:54:02,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:02,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-16 13:54:02,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-09-16 13:54:02,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-16 13:54:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-16 13:54:02,236 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-16 13:54:02,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:02,236 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-16 13:54:02,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:54:02,237 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-16 13:54:02,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:02,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:02,237 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:02,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-16 13:54:02,447 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:02,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:02,447 INFO L82 PathProgramCache]: Analyzing trace with hash 2129172475, now seen corresponding path program 13 times [2020-09-16 13:54:02,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:02,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521833452] [2020-09-16 13:54:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:02,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521833452] [2020-09-16 13:54:02,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846467421] [2020-09-16 13:54:02,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:02,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:54:02,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:02,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:54:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:02,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:02,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:54:02,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951313900] [2020-09-16 13:54:02,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:54:02,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:02,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:54:02,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:54:02,646 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-16 13:54:02,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:02,886 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-09-16 13:54:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:54:02,887 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:54:02,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:02,888 INFO L225 Difference]: With dead ends: 141 [2020-09-16 13:54:02,888 INFO L226 Difference]: Without dead ends: 136 [2020-09-16 13:54:02,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-09-16 13:54:02,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-16 13:54:02,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-09-16 13:54:02,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-16 13:54:02,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-16 13:54:02,893 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-16 13:54:02,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:02,894 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-16 13:54:02,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:54:02,894 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-16 13:54:02,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:02,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:02,896 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:03,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-16 13:54:03,106 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:03,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:03,107 INFO L82 PathProgramCache]: Analyzing trace with hash 2129173436, now seen corresponding path program 14 times [2020-09-16 13:54:03,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:03,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151207417] [2020-09-16 13:54:03,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:03,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151207417] [2020-09-16 13:54:03,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096142117] [2020-09-16 13:54:03,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:03,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:03,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:03,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:54:03,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:03,303 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:03,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:03,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:54:03,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476603768] [2020-09-16 13:54:03,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:54:03,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:03,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:54:03,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:54:03,317 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-16 13:54:03,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:03,502 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-09-16 13:54:03,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:54:03,502 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:54:03,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:03,503 INFO L225 Difference]: With dead ends: 136 [2020-09-16 13:54:03,503 INFO L226 Difference]: Without dead ends: 131 [2020-09-16 13:54:03,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:54:03,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-16 13:54:03,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-09-16 13:54:03,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-16 13:54:03,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-09-16 13:54:03,507 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-09-16 13:54:03,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:03,509 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-09-16 13:54:03,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:54:03,509 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-09-16 13:54:03,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:03,509 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:03,510 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:03,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-09-16 13:54:03,719 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:03,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:03,720 INFO L82 PathProgramCache]: Analyzing trace with hash 2129381756, now seen corresponding path program 15 times [2020-09-16 13:54:03,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:03,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607223015] [2020-09-16 13:54:03,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:03,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607223015] [2020-09-16 13:54:03,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709852397] [2020-09-16 13:54:03,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:03,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:54:03,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:03,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:54:03,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:03,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:03,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:54:03,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425465992] [2020-09-16 13:54:03,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:54:03,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:03,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:54:03,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:54:03,919 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-09-16 13:54:04,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:04,019 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-09-16 13:54:04,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:54:04,019 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:54:04,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:04,020 INFO L225 Difference]: With dead ends: 130 [2020-09-16 13:54:04,020 INFO L226 Difference]: Without dead ends: 128 [2020-09-16 13:54:04,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-16 13:54:04,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-16 13:54:04,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-09-16 13:54:04,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-16 13:54:04,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-16 13:54:04,025 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-16 13:54:04,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:04,025 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-16 13:54:04,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:54:04,026 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-16 13:54:04,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:04,026 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:04,026 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:04,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-16 13:54:04,236 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:04,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:04,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044846, now seen corresponding path program 16 times [2020-09-16 13:54:04,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:04,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41917695] [2020-09-16 13:54:04,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:04,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41917695] [2020-09-16 13:54:04,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932766224] [2020-09-16 13:54:04,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:04,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:04,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:04,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:54:04,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:04,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:04,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:54:04,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924096474] [2020-09-16 13:54:04,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:54:04,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:04,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:54:04,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:54:04,433 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-16 13:54:04,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:04,602 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-09-16 13:54:04,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 13:54:04,602 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:54:04,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:04,604 INFO L225 Difference]: With dead ends: 131 [2020-09-16 13:54:04,604 INFO L226 Difference]: Without dead ends: 129 [2020-09-16 13:54:04,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-09-16 13:54:04,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-16 13:54:04,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-09-16 13:54:04,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-16 13:54:04,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-16 13:54:04,610 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-16 13:54:04,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:04,610 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-16 13:54:04,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:54:04,611 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-16 13:54:04,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:04,611 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:04,611 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:04,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-16 13:54:04,821 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:04,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:04,822 INFO L82 PathProgramCache]: Analyzing trace with hash 2130066205, now seen corresponding path program 17 times [2020-09-16 13:54:04,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:04,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23057897] [2020-09-16 13:54:04,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:04,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23057897] [2020-09-16 13:54:04,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616181073] [2020-09-16 13:54:04,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:04,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:04,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:04,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:54:04,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:05,021 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:54:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:05,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:05,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:54:05,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549643494] [2020-09-16 13:54:05,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:54:05,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:05,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:54:05,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:54:05,033 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-16 13:54:05,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:05,168 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-09-16 13:54:05,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:54:05,168 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:54:05,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:05,169 INFO L225 Difference]: With dead ends: 131 [2020-09-16 13:54:05,170 INFO L226 Difference]: Without dead ends: 126 [2020-09-16 13:54:05,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:54:05,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-16 13:54:05,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-09-16 13:54:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-16 13:54:05,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-16 13:54:05,176 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-16 13:54:05,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:05,177 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-16 13:54:05,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:54:05,177 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-16 13:54:05,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:05,178 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:05,178 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:05,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:05,391 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:05,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:05,392 INFO L82 PathProgramCache]: Analyzing trace with hash 2130067166, now seen corresponding path program 18 times [2020-09-16 13:54:05,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:05,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533635637] [2020-09-16 13:54:05,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:05,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533635637] [2020-09-16 13:54:05,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907707200] [2020-09-16 13:54:05,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:05,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:54:05,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:05,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:54:05,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:05,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:05,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:05,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:54:05,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472123952] [2020-09-16 13:54:05,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:54:05,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:05,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:54:05,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:54:05,615 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-16 13:54:05,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:05,838 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-09-16 13:54:05,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:54:05,838 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:54:05,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:05,840 INFO L225 Difference]: With dead ends: 145 [2020-09-16 13:54:05,840 INFO L226 Difference]: Without dead ends: 140 [2020-09-16 13:54:05,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-09-16 13:54:05,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-16 13:54:05,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-09-16 13:54:05,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-16 13:54:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-16 13:54:05,846 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-16 13:54:05,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:05,846 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-16 13:54:05,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:54:05,847 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-16 13:54:05,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:05,847 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:05,848 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:06,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-09-16 13:54:06,060 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:06,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:06,061 INFO L82 PathProgramCache]: Analyzing trace with hash 2130095996, now seen corresponding path program 19 times [2020-09-16 13:54:06,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:06,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180812416] [2020-09-16 13:54:06,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:06,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:06,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180812416] [2020-09-16 13:54:06,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719934335] [2020-09-16 13:54:06,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:06,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:54:06,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:06,266 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:54:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:06,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:06,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:54:06,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112981912] [2020-09-16 13:54:06,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:54:06,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:06,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:54:06,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:54:06,282 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-16 13:54:06,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:06,475 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-09-16 13:54:06,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:54:06,476 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:54:06,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:06,477 INFO L225 Difference]: With dead ends: 135 [2020-09-16 13:54:06,477 INFO L226 Difference]: Without dead ends: 130 [2020-09-16 13:54:06,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:54:06,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-16 13:54:06,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-09-16 13:54:06,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-16 13:54:06,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-09-16 13:54:06,482 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-09-16 13:54:06,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:06,483 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-09-16 13:54:06,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:54:06,483 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-09-16 13:54:06,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:06,484 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:06,484 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:06,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:06,694 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:06,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:06,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1822274800, now seen corresponding path program 4 times [2020-09-16 13:54:06,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:06,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687983533] [2020-09-16 13:54:06,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:06,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687983533] [2020-09-16 13:54:06,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084402016] [2020-09-16 13:54:06,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:06,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:06,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:06,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:06,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:06,941 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:54:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:06,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:06,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-09-16 13:54:06,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590270329] [2020-09-16 13:54:06,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 13:54:06,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:06,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 13:54:06,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-16 13:54:06,974 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-09-16 13:54:07,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:07,126 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-09-16 13:54:07,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:07,127 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-09-16 13:54:07,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:07,129 INFO L225 Difference]: With dead ends: 143 [2020-09-16 13:54:07,129 INFO L226 Difference]: Without dead ends: 138 [2020-09-16 13:54:07,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-09-16 13:54:07,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-16 13:54:07,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-09-16 13:54:07,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-16 13:54:07,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-09-16 13:54:07,134 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-09-16 13:54:07,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:07,134 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-09-16 13:54:07,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 13:54:07,134 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-09-16 13:54:07,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:07,135 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:07,135 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:07,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-09-16 13:54:07,347 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:07,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:07,348 INFO L82 PathProgramCache]: Analyzing trace with hash 62604888, now seen corresponding path program 10 times [2020-09-16 13:54:07,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:07,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679853752] [2020-09-16 13:54:07,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:07,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:07,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:07,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679853752] [2020-09-16 13:54:07,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32923199] [2020-09-16 13:54:07,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:07,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:07,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:07,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:07,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:07,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:07,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:07,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357046376] [2020-09-16 13:54:07,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:07,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:07,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:07,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:07,629 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-09-16 13:54:07,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:07,682 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-09-16 13:54:07,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 13:54:07,682 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-16 13:54:07,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:07,683 INFO L225 Difference]: With dead ends: 132 [2020-09-16 13:54:07,684 INFO L226 Difference]: Without dead ends: 129 [2020-09-16 13:54:07,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:07,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-16 13:54:07,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-09-16 13:54:07,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-16 13:54:07,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-16 13:54:07,688 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-16 13:54:07,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:07,688 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-16 13:54:07,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:07,688 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-16 13:54:07,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:07,689 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:07,689 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:07,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-16 13:54:07,890 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:07,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:07,891 INFO L82 PathProgramCache]: Analyzing trace with hash 727540008, now seen corresponding path program 11 times [2020-09-16 13:54:07,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:07,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891971397] [2020-09-16 13:54:07,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:07,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:07,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891971397] [2020-09-16 13:54:07,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514353332] [2020-09-16 13:54:07,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:08,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:54:08,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:08,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:08,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:08,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:08,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:08,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148867778] [2020-09-16 13:54:08,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:08,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:08,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:08,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:08,205 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-16 13:54:08,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:08,284 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-09-16 13:54:08,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 13:54:08,285 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-16 13:54:08,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:08,286 INFO L225 Difference]: With dead ends: 143 [2020-09-16 13:54:08,287 INFO L226 Difference]: Without dead ends: 140 [2020-09-16 13:54:08,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-09-16 13:54:08,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-16 13:54:08,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-09-16 13:54:08,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-16 13:54:08,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-16 13:54:08,293 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-16 13:54:08,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:08,293 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-16 13:54:08,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:08,293 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-16 13:54:08,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:08,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:08,294 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:08,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-09-16 13:54:08,507 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:08,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:08,508 INFO L82 PathProgramCache]: Analyzing trace with hash 748989528, now seen corresponding path program 12 times [2020-09-16 13:54:08,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:08,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208295229] [2020-09-16 13:54:08,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:08,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208295229] [2020-09-16 13:54:08,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127584863] [2020-09-16 13:54:08,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:08,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:54:08,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:08,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:08,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:08,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:08,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:08,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780700553] [2020-09-16 13:54:08,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:08,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:08,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:08,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:08,760 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-16 13:54:08,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:08,855 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-09-16 13:54:08,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:54:08,856 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-16 13:54:08,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:08,857 INFO L225 Difference]: With dead ends: 142 [2020-09-16 13:54:08,858 INFO L226 Difference]: Without dead ends: 139 [2020-09-16 13:54:08,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:08,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-16 13:54:08,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-09-16 13:54:08,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-16 13:54:08,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-09-16 13:54:08,862 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-09-16 13:54:08,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:08,862 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-09-16 13:54:08,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:08,863 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-09-16 13:54:08,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:08,863 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:08,863 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:09,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-16 13:54:09,074 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:09,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:09,075 INFO L82 PathProgramCache]: Analyzing trace with hash 749681448, now seen corresponding path program 13 times [2020-09-16 13:54:09,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:09,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941631299] [2020-09-16 13:54:09,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:09,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941631299] [2020-09-16 13:54:09,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579647762] [2020-09-16 13:54:09,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:09,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:09,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:09,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:09,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:09,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:09,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326164502] [2020-09-16 13:54:09,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:09,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:09,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:09,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:09,332 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-09-16 13:54:09,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:09,453 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-09-16 13:54:09,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:54:09,454 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-16 13:54:09,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:09,455 INFO L225 Difference]: With dead ends: 141 [2020-09-16 13:54:09,455 INFO L226 Difference]: Without dead ends: 138 [2020-09-16 13:54:09,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-09-16 13:54:09,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-16 13:54:09,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-09-16 13:54:09,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-16 13:54:09,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-09-16 13:54:09,459 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-09-16 13:54:09,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:09,460 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-09-16 13:54:09,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:09,460 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-09-16 13:54:09,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:09,460 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:09,461 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:09,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-16 13:54:09,671 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:09,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:09,672 INFO L82 PathProgramCache]: Analyzing trace with hash 749703768, now seen corresponding path program 14 times [2020-09-16 13:54:09,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:09,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739220347] [2020-09-16 13:54:09,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:09,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:09,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739220347] [2020-09-16 13:54:09,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052620413] [2020-09-16 13:54:09,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:09,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:09,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:09,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:09,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:09,906 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:09,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:09,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:09,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877158961] [2020-09-16 13:54:09,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:09,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:09,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:09,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:09,923 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-09-16 13:54:10,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:10,096 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-16 13:54:10,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:10,096 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-16 13:54:10,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:10,098 INFO L225 Difference]: With dead ends: 150 [2020-09-16 13:54:10,098 INFO L226 Difference]: Without dead ends: 144 [2020-09-16 13:54:10,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-16 13:54:10,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-16 13:54:10,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-09-16 13:54:10,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-16 13:54:10,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-09-16 13:54:10,102 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-09-16 13:54:10,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:10,102 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-09-16 13:54:10,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:10,102 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-09-16 13:54:10,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:10,103 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:10,103 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:10,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:10,312 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:10,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:10,312 INFO L82 PathProgramCache]: Analyzing trace with hash 920465749, now seen corresponding path program 20 times [2020-09-16 13:54:10,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:10,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914432142] [2020-09-16 13:54:10,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:10,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914432142] [2020-09-16 13:54:10,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568846699] [2020-09-16 13:54:10,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:10,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:10,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:10,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:10,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:10,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:10,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:10,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236547809] [2020-09-16 13:54:10,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:10,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:10,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:10,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:10,591 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-09-16 13:54:10,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:10,652 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-09-16 13:54:10,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 13:54:10,653 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:10,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:10,654 INFO L225 Difference]: With dead ends: 138 [2020-09-16 13:54:10,655 INFO L226 Difference]: Without dead ends: 136 [2020-09-16 13:54:10,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:10,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-16 13:54:10,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-09-16 13:54:10,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-16 13:54:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-09-16 13:54:10,658 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-09-16 13:54:10,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:10,659 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-09-16 13:54:10,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:10,659 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-09-16 13:54:10,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:10,659 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:10,659 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:10,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-16 13:54:10,860 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:10,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:10,861 INFO L82 PathProgramCache]: Analyzing trace with hash 920466710, now seen corresponding path program 21 times [2020-09-16 13:54:10,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:10,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581599573] [2020-09-16 13:54:10,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:10,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581599573] [2020-09-16 13:54:10,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229717724] [2020-09-16 13:54:10,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:11,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:54:11,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:11,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:11,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:11,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:11,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:11,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21521131] [2020-09-16 13:54:11,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:11,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:11,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:11,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:11,122 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-09-16 13:54:11,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:11,245 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-09-16 13:54:11,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 13:54:11,246 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:11,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:11,247 INFO L225 Difference]: With dead ends: 145 [2020-09-16 13:54:11,247 INFO L226 Difference]: Without dead ends: 143 [2020-09-16 13:54:11,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-09-16 13:54:11,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-16 13:54:11,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-09-16 13:54:11,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-16 13:54:11,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-09-16 13:54:11,252 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-09-16 13:54:11,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:11,252 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-09-16 13:54:11,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:11,252 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-09-16 13:54:11,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:11,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:11,253 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:11,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-16 13:54:11,462 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:11,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:11,463 INFO L82 PathProgramCache]: Analyzing trace with hash 920495540, now seen corresponding path program 22 times [2020-09-16 13:54:11,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:11,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106565006] [2020-09-16 13:54:11,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:11,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:11,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106565006] [2020-09-16 13:54:11,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91902510] [2020-09-16 13:54:11,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:11,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:11,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:11,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:11,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:11,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:11,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:11,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:11,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314712013] [2020-09-16 13:54:11,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:11,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:11,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:11,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:11,688 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-09-16 13:54:11,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:11,841 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-16 13:54:11,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:54:11,841 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:11,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:11,842 INFO L225 Difference]: With dead ends: 150 [2020-09-16 13:54:11,843 INFO L226 Difference]: Without dead ends: 148 [2020-09-16 13:54:11,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:54:11,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-16 13:54:11,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-09-16 13:54:11,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-16 13:54:11,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-09-16 13:54:11,847 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-09-16 13:54:11,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:11,848 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-09-16 13:54:11,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:11,848 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-09-16 13:54:11,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:11,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:11,849 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:12,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:12,050 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:12,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:12,050 INFO L82 PathProgramCache]: Analyzing trace with hash 921389270, now seen corresponding path program 23 times [2020-09-16 13:54:12,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:12,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499188724] [2020-09-16 13:54:12,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:12,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499188724] [2020-09-16 13:54:12,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002331965] [2020-09-16 13:54:12,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:12,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:54:12,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:12,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:12,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:12,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:12,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:12,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377882051] [2020-09-16 13:54:12,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:12,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:12,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:12,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:12,343 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-09-16 13:54:12,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:12,489 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-09-16 13:54:12,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:54:12,490 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:12,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:12,491 INFO L225 Difference]: With dead ends: 148 [2020-09-16 13:54:12,491 INFO L226 Difference]: Without dead ends: 146 [2020-09-16 13:54:12,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:54:12,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-16 13:54:12,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-09-16 13:54:12,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-16 13:54:12,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-16 13:54:12,495 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-16 13:54:12,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:12,496 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-16 13:54:12,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:12,497 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-16 13:54:12,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:12,497 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:12,497 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:12,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-16 13:54:12,707 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:12,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:12,708 INFO L82 PathProgramCache]: Analyzing trace with hash 921390231, now seen corresponding path program 24 times [2020-09-16 13:54:12,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:12,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757184719] [2020-09-16 13:54:12,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:12,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757184719] [2020-09-16 13:54:12,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752622350] [2020-09-16 13:54:12,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:12,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:54:12,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:12,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:12,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:12,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:12,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:12,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812033946] [2020-09-16 13:54:12,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:12,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:12,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:12,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:12,977 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-16 13:54:13,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:13,131 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-09-16 13:54:13,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:54:13,132 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:13,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:13,133 INFO L225 Difference]: With dead ends: 149 [2020-09-16 13:54:13,133 INFO L226 Difference]: Without dead ends: 147 [2020-09-16 13:54:13,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:54:13,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-16 13:54:13,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-09-16 13:54:13,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-16 13:54:13,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-09-16 13:54:13,138 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-09-16 13:54:13,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:13,139 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-09-16 13:54:13,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:13,139 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-09-16 13:54:13,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:13,139 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:13,140 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:13,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:13,351 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:13,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:13,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1557695239, now seen corresponding path program 25 times [2020-09-16 13:54:13,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:13,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279090677] [2020-09-16 13:54:13,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:13,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:13,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279090677] [2020-09-16 13:54:13,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312328725] [2020-09-16 13:54:13,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:13,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:13,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:13,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:13,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:13,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:13,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095715123] [2020-09-16 13:54:13,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:13,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:13,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:13,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:13,652 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-09-16 13:54:13,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:13,727 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-09-16 13:54:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 13:54:13,727 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:13,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:13,728 INFO L225 Difference]: With dead ends: 152 [2020-09-16 13:54:13,728 INFO L226 Difference]: Without dead ends: 150 [2020-09-16 13:54:13,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-09-16 13:54:13,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-16 13:54:13,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-09-16 13:54:13,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-16 13:54:13,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-09-16 13:54:13,739 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-09-16 13:54:13,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:13,739 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-09-16 13:54:13,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:13,739 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-09-16 13:54:13,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:13,740 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:13,740 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:13,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-16 13:54:13,951 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:13,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:13,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1557696200, now seen corresponding path program 26 times [2020-09-16 13:54:13,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:13,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235699756] [2020-09-16 13:54:13,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:13,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:14,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235699756] [2020-09-16 13:54:14,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487960144] [2020-09-16 13:54:14,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:14,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:14,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:14,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:14,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:14,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:14,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:14,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975005565] [2020-09-16 13:54:14,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:14,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:14,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:14,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:14,200 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-09-16 13:54:14,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:14,340 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-09-16 13:54:14,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 13:54:14,340 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:14,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:14,342 INFO L225 Difference]: With dead ends: 153 [2020-09-16 13:54:14,342 INFO L226 Difference]: Without dead ends: 151 [2020-09-16 13:54:14,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:54:14,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-16 13:54:14,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-09-16 13:54:14,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-16 13:54:14,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-16 13:54:14,348 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-16 13:54:14,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:14,349 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-16 13:54:14,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:14,349 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-16 13:54:14,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:14,349 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:14,350 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:14,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-09-16 13:54:14,561 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:14,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:14,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1557725030, now seen corresponding path program 27 times [2020-09-16 13:54:14,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:14,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765272252] [2020-09-16 13:54:14,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:14,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765272252] [2020-09-16 13:54:14,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295418441] [2020-09-16 13:54:14,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:14,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:54:14,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:14,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:14,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:14,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:14,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:14,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:14,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459108940] [2020-09-16 13:54:14,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:14,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:14,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:14,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:14,827 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-16 13:54:15,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:15,005 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-16 13:54:15,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 13:54:15,006 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:15,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:15,007 INFO L225 Difference]: With dead ends: 156 [2020-09-16 13:54:15,008 INFO L226 Difference]: Without dead ends: 154 [2020-09-16 13:54:15,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-09-16 13:54:15,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-16 13:54:15,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-09-16 13:54:15,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-16 13:54:15,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-09-16 13:54:15,014 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-09-16 13:54:15,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:15,014 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-09-16 13:54:15,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:15,014 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-09-16 13:54:15,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:15,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:15,015 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:15,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-16 13:54:15,216 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:15,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:15,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251029, now seen corresponding path program 28 times [2020-09-16 13:54:15,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:15,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551559156] [2020-09-16 13:54:15,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:15,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551559156] [2020-09-16 13:54:15,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118192573] [2020-09-16 13:54:15,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:15,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:15,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:15,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:15,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:15,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:15,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:15,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591665911] [2020-09-16 13:54:15,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:15,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:15,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:15,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:15,496 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-09-16 13:54:15,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:15,592 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-09-16 13:54:15,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:54:15,595 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:15,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:15,595 INFO L225 Difference]: With dead ends: 148 [2020-09-16 13:54:15,596 INFO L226 Difference]: Without dead ends: 146 [2020-09-16 13:54:15,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:15,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-16 13:54:15,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-09-16 13:54:15,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-16 13:54:15,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-16 13:54:15,599 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-16 13:54:15,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:15,600 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-16 13:54:15,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:15,600 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-16 13:54:15,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:15,600 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:15,601 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:15,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-09-16 13:54:15,811 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:15,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:15,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251990, now seen corresponding path program 29 times [2020-09-16 13:54:15,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:15,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232073966] [2020-09-16 13:54:15,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:15,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232073966] [2020-09-16 13:54:15,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937305847] [2020-09-16 13:54:15,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:15,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:15,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:15,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:15,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:16,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:16,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:16,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529055014] [2020-09-16 13:54:16,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:16,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:16,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:16,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:16,068 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-16 13:54:16,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:16,236 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-09-16 13:54:16,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:16,236 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:16,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:16,237 INFO L225 Difference]: With dead ends: 157 [2020-09-16 13:54:16,238 INFO L226 Difference]: Without dead ends: 155 [2020-09-16 13:54:16,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-09-16 13:54:16,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-16 13:54:16,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-09-16 13:54:16,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-16 13:54:16,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-09-16 13:54:16,242 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-09-16 13:54:16,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:16,242 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-09-16 13:54:16,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:16,242 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-09-16 13:54:16,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:16,243 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:16,243 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:16,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:16,444 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:16,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:16,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1578914119, now seen corresponding path program 30 times [2020-09-16 13:54:16,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:16,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323722005] [2020-09-16 13:54:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:16,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323722005] [2020-09-16 13:54:16,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889001651] [2020-09-16 13:54:16,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:16,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:54:16,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:16,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:54:16,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:16,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:16,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-16 13:54:16,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000035290] [2020-09-16 13:54:16,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 13:54:16,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:16,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 13:54:16,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-16 13:54:16,632 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-09-16 13:54:16,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:16,739 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-09-16 13:54:16,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:54:16,740 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-16 13:54:16,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:16,742 INFO L225 Difference]: With dead ends: 149 [2020-09-16 13:54:16,742 INFO L226 Difference]: Without dead ends: 147 [2020-09-16 13:54:16,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-09-16 13:54:16,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-16 13:54:16,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-09-16 13:54:16,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-16 13:54:16,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-16 13:54:16,746 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-16 13:54:16,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:16,746 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-16 13:54:16,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 13:54:16,747 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-16 13:54:16,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:16,747 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:16,748 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:16,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-16 13:54:16,956 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:16,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:16,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1578936439, now seen corresponding path program 31 times [2020-09-16 13:54:16,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:16,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799092574] [2020-09-16 13:54:16,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:17,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:17,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799092574] [2020-09-16 13:54:17,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013025761] [2020-09-16 13:54:17,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:17,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:17,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:17,199 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:17,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:17,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:17,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:17,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798999716] [2020-09-16 13:54:17,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:17,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:17,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:17,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:17,236 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-16 13:54:17,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:17,517 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-09-16 13:54:17,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:17,517 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:17,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:17,519 INFO L225 Difference]: With dead ends: 164 [2020-09-16 13:54:17,519 INFO L226 Difference]: Without dead ends: 159 [2020-09-16 13:54:17,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:54:17,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-16 13:54:17,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-16 13:54:17,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-16 13:54:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-09-16 13:54:17,523 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-09-16 13:54:17,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:17,523 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-09-16 13:54:17,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:17,523 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-09-16 13:54:17,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:17,524 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:17,524 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:17,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-16 13:54:17,734 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:17,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:17,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1578943910, now seen corresponding path program 32 times [2020-09-16 13:54:17,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:17,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679244509] [2020-09-16 13:54:17,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:17,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679244509] [2020-09-16 13:54:17,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85469022] [2020-09-16 13:54:17,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:17,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:17,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:17,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:17,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:17,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:17,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:17,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:17,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380953133] [2020-09-16 13:54:17,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:17,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:18,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:18,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:18,000 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-09-16 13:54:18,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:18,221 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-16 13:54:18,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 13:54:18,222 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:18,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:18,223 INFO L225 Difference]: With dead ends: 156 [2020-09-16 13:54:18,223 INFO L226 Difference]: Without dead ends: 154 [2020-09-16 13:54:18,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-09-16 13:54:18,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-16 13:54:18,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-09-16 13:54:18,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-16 13:54:18,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-16 13:54:18,227 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-16 13:54:18,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:18,228 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-16 13:54:18,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:18,228 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-16 13:54:18,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:18,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:18,229 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:18,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:18,438 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:18,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:18,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1578965269, now seen corresponding path program 33 times [2020-09-16 13:54:18,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:18,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382415998] [2020-09-16 13:54:18,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:18,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382415998] [2020-09-16 13:54:18,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341862494] [2020-09-16 13:54:18,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:18,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:54:18,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:18,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:18,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:18,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:54:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:18,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:18,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:18,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199242961] [2020-09-16 13:54:18,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:18,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:18,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:18,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:18,717 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-16 13:54:19,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:19,130 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-09-16 13:54:19,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 13:54:19,131 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:19,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:19,133 INFO L225 Difference]: With dead ends: 176 [2020-09-16 13:54:19,133 INFO L226 Difference]: Without dead ends: 171 [2020-09-16 13:54:19,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-09-16 13:54:19,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-16 13:54:19,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-09-16 13:54:19,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-16 13:54:19,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-16 13:54:19,138 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-16 13:54:19,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:19,138 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-16 13:54:19,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:19,138 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-16 13:54:19,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:19,139 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:19,139 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:19,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-09-16 13:54:19,340 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:19,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:19,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1578966230, now seen corresponding path program 34 times [2020-09-16 13:54:19,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:19,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26391431] [2020-09-16 13:54:19,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:19,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:19,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26391431] [2020-09-16 13:54:19,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387493711] [2020-09-16 13:54:19,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:19,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:19,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:19,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:19,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:19,583 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:19,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:19,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:19,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808361839] [2020-09-16 13:54:19,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:19,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:19,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:19,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:19,628 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-16 13:54:19,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:19,931 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-09-16 13:54:19,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:19,932 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:19,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:19,933 INFO L225 Difference]: With dead ends: 166 [2020-09-16 13:54:19,933 INFO L226 Difference]: Without dead ends: 161 [2020-09-16 13:54:19,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:54:19,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-16 13:54:19,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-09-16 13:54:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-16 13:54:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-09-16 13:54:19,937 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-09-16 13:54:19,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:19,938 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-09-16 13:54:19,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:19,938 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-09-16 13:54:19,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:19,938 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:19,939 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:20,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:20,150 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:20,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:20,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1579174550, now seen corresponding path program 35 times [2020-09-16 13:54:20,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:20,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925045171] [2020-09-16 13:54:20,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:20,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925045171] [2020-09-16 13:54:20,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527924281] [2020-09-16 13:54:20,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:20,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:20,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:20,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:20,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:20,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:20,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:20,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729068635] [2020-09-16 13:54:20,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:20,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:20,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:20,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:20,400 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-09-16 13:54:20,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:20,614 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-09-16 13:54:20,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:20,615 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:20,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:20,617 INFO L225 Difference]: With dead ends: 163 [2020-09-16 13:54:20,617 INFO L226 Difference]: Without dead ends: 161 [2020-09-16 13:54:20,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-16 13:54:20,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-16 13:54:20,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-09-16 13:54:20,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-16 13:54:20,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-09-16 13:54:20,624 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-09-16 13:54:20,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:20,625 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-09-16 13:54:20,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:20,625 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-09-16 13:54:20,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:20,626 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:20,626 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:20,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-16 13:54:20,839 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:20,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:20,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1579837640, now seen corresponding path program 36 times [2020-09-16 13:54:20,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:20,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507912609] [2020-09-16 13:54:20,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:20,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507912609] [2020-09-16 13:54:20,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226075672] [2020-09-16 13:54:20,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:20,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:54:20,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:20,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:20,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:21,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:21,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:21,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135696253] [2020-09-16 13:54:21,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:21,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:21,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:21,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:21,070 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-09-16 13:54:21,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:21,386 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-09-16 13:54:21,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:54:21,386 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:21,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:21,388 INFO L225 Difference]: With dead ends: 170 [2020-09-16 13:54:21,388 INFO L226 Difference]: Without dead ends: 168 [2020-09-16 13:54:21,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-09-16 13:54:21,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-16 13:54:21,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-09-16 13:54:21,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-16 13:54:21,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-09-16 13:54:21,394 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-09-16 13:54:21,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:21,394 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-09-16 13:54:21,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:21,394 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-09-16 13:54:21,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:21,395 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:21,395 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:21,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:21,601 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:21,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:21,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1579858999, now seen corresponding path program 37 times [2020-09-16 13:54:21,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:21,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568710712] [2020-09-16 13:54:21,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:21,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:21,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568710712] [2020-09-16 13:54:21,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091708071] [2020-09-16 13:54:21,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:21,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:21,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:21,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:54:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:21,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:21,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:21,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111544609] [2020-09-16 13:54:21,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:21,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:21,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:21,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:21,845 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-09-16 13:54:22,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:22,223 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-09-16 13:54:22,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:54:22,224 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:22,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:22,225 INFO L225 Difference]: With dead ends: 177 [2020-09-16 13:54:22,225 INFO L226 Difference]: Without dead ends: 172 [2020-09-16 13:54:22,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-16 13:54:22,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-16 13:54:22,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-09-16 13:54:22,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-16 13:54:22,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-09-16 13:54:22,229 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-09-16 13:54:22,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:22,229 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-09-16 13:54:22,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:22,229 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-09-16 13:54:22,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:22,230 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:22,230 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:22,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-16 13:54:22,438 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:22,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:22,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859960, now seen corresponding path program 38 times [2020-09-16 13:54:22,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:22,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779353320] [2020-09-16 13:54:22,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:22,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:22,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779353320] [2020-09-16 13:54:22,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125785568] [2020-09-16 13:54:22,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:22,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:22,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:22,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:22,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:22,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:22,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:22,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:22,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688739167] [2020-09-16 13:54:22,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:22,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:22,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:22,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:22,649 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-09-16 13:54:23,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:23,070 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-09-16 13:54:23,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 13:54:23,071 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:23,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:23,072 INFO L225 Difference]: With dead ends: 190 [2020-09-16 13:54:23,072 INFO L226 Difference]: Without dead ends: 182 [2020-09-16 13:54:23,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:54:23,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-16 13:54:23,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-09-16 13:54:23,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-16 13:54:23,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-09-16 13:54:23,076 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-09-16 13:54:23,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:23,076 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-09-16 13:54:23,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:23,076 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-09-16 13:54:23,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:23,077 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:23,077 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:23,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-16 13:54:23,278 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:23,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:23,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888790, now seen corresponding path program 39 times [2020-09-16 13:54:23,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:23,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074065285] [2020-09-16 13:54:23,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:23,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074065285] [2020-09-16 13:54:23,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704000415] [2020-09-16 13:54:23,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:23,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:54:23,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:23,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:23,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:23,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:54:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:23,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:23,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:23,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833145030] [2020-09-16 13:54:23,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:23,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:23,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:23,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:23,512 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-09-16 13:54:23,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:23,915 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-09-16 13:54:23,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:54:23,916 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:23,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:23,917 INFO L225 Difference]: With dead ends: 180 [2020-09-16 13:54:23,917 INFO L226 Difference]: Without dead ends: 175 [2020-09-16 13:54:23,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:54:23,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-16 13:54:23,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-09-16 13:54:23,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-16 13:54:23,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-09-16 13:54:23,921 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-09-16 13:54:23,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:23,921 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-09-16 13:54:23,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:23,921 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-09-16 13:54:23,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:23,921 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:23,921 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:24,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-16 13:54:24,122 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:24,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:24,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1586324390, now seen corresponding path program 40 times [2020-09-16 13:54:24,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:24,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110981874] [2020-09-16 13:54:24,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:24,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110981874] [2020-09-16 13:54:24,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244782825] [2020-09-16 13:54:24,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:24,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:24,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:24,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:24,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:24,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:24,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:24,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395966496] [2020-09-16 13:54:24,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:24,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:24,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:24,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:24,386 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-09-16 13:54:24,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:24,550 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-09-16 13:54:24,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:24,551 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:24,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:24,552 INFO L225 Difference]: With dead ends: 164 [2020-09-16 13:54:24,552 INFO L226 Difference]: Without dead ends: 162 [2020-09-16 13:54:24,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-09-16 13:54:24,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-16 13:54:24,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-09-16 13:54:24,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-16 13:54:24,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-09-16 13:54:24,556 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-09-16 13:54:24,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:24,556 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-09-16 13:54:24,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:24,556 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-09-16 13:54:24,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:24,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:24,557 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:24,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-16 13:54:24,767 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:24,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:24,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1586325351, now seen corresponding path program 41 times [2020-09-16 13:54:24,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:24,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316946636] [2020-09-16 13:54:24,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:24,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316946636] [2020-09-16 13:54:24,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080245026] [2020-09-16 13:54:24,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:24,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:24,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:24,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:24,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:25,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:25,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:25,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:25,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736926774] [2020-09-16 13:54:25,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:25,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:25,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:25,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:25,020 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-09-16 13:54:25,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:25,200 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-09-16 13:54:25,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 13:54:25,201 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:25,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:25,202 INFO L225 Difference]: With dead ends: 161 [2020-09-16 13:54:25,202 INFO L226 Difference]: Without dead ends: 159 [2020-09-16 13:54:25,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-09-16 13:54:25,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-16 13:54:25,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-09-16 13:54:25,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-16 13:54:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-09-16 13:54:25,205 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-09-16 13:54:25,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:25,206 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-09-16 13:54:25,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:25,206 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-09-16 13:54:25,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:25,206 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:25,207 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:25,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-16 13:54:25,416 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:25,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:25,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880180, now seen corresponding path program 42 times [2020-09-16 13:54:25,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:25,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926762503] [2020-09-16 13:54:25,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:25,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926762503] [2020-09-16 13:54:25,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143186755] [2020-09-16 13:54:25,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:25,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:54:25,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:25,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:25,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:25,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:25,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:25,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610350293] [2020-09-16 13:54:25,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:25,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:25,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:25,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:25,670 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-09-16 13:54:25,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:25,906 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-09-16 13:54:25,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:54:25,907 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:25,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:25,908 INFO L225 Difference]: With dead ends: 165 [2020-09-16 13:54:25,908 INFO L226 Difference]: Without dead ends: 163 [2020-09-16 13:54:25,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-09-16 13:54:25,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-16 13:54:25,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-09-16 13:54:25,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-16 13:54:25,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-09-16 13:54:25,913 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-09-16 13:54:25,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:25,913 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-09-16 13:54:25,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:25,914 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-09-16 13:54:25,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:25,914 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:25,914 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:26,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-09-16 13:54:26,115 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:26,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:26,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1606881141, now seen corresponding path program 43 times [2020-09-16 13:54:26,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:26,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364032875] [2020-09-16 13:54:26,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:26,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:26,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364032875] [2020-09-16 13:54:26,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274746241] [2020-09-16 13:54:26,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:26,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:26,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:26,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:26,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:26,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020285662] [2020-09-16 13:54:26,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:26,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:26,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:26,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:26,385 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-09-16 13:54:26,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:26,609 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-09-16 13:54:26,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:54:26,610 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:26,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:26,611 INFO L225 Difference]: With dead ends: 167 [2020-09-16 13:54:26,611 INFO L226 Difference]: Without dead ends: 165 [2020-09-16 13:54:26,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-16 13:54:26,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-16 13:54:26,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-09-16 13:54:26,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-16 13:54:26,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-16 13:54:26,616 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-16 13:54:26,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:26,616 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-16 13:54:26,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:26,616 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-16 13:54:26,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:26,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:26,617 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:26,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:26,819 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:26,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:26,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1607543270, now seen corresponding path program 44 times [2020-09-16 13:54:26,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:26,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873092098] [2020-09-16 13:54:26,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:26,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:26,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873092098] [2020-09-16 13:54:26,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936088282] [2020-09-16 13:54:26,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:26,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:26,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:26,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:26,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:27,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:27,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:27,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:27,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336658554] [2020-09-16 13:54:27,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:27,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:27,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:27,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:27,042 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-16 13:54:27,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:27,358 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-09-16 13:54:27,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 13:54:27,358 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:27,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:27,359 INFO L225 Difference]: With dead ends: 168 [2020-09-16 13:54:27,359 INFO L226 Difference]: Without dead ends: 166 [2020-09-16 13:54:27,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:54:27,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-16 13:54:27,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-09-16 13:54:27,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-16 13:54:27,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-16 13:54:27,362 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-16 13:54:27,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:27,362 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-16 13:54:27,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:27,362 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-16 13:54:27,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:27,363 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:27,363 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:27,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:27,565 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:27,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:27,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1607564629, now seen corresponding path program 45 times [2020-09-16 13:54:27,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:27,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424282309] [2020-09-16 13:54:27,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:27,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:27,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424282309] [2020-09-16 13:54:27,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223313736] [2020-09-16 13:54:27,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:27,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:54:27,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:27,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:27,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:27,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:54:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:27,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:27,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:27,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701755205] [2020-09-16 13:54:27,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:27,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:27,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:27,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:27,778 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-16 13:54:28,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:28,016 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-09-16 13:54:28,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:28,017 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:28,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:28,019 INFO L225 Difference]: With dead ends: 160 [2020-09-16 13:54:28,019 INFO L226 Difference]: Without dead ends: 155 [2020-09-16 13:54:28,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:54:28,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-16 13:54:28,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-09-16 13:54:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-16 13:54:28,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-16 13:54:28,023 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-16 13:54:28,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:28,023 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-16 13:54:28,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:28,023 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-16 13:54:28,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:28,024 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:28,024 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:28,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:28,235 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:28,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:28,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1607565590, now seen corresponding path program 46 times [2020-09-16 13:54:28,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:28,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268046267] [2020-09-16 13:54:28,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:28,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268046267] [2020-09-16 13:54:28,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195115420] [2020-09-16 13:54:28,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:28,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:28,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:28,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:28,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:28,467 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:28,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:28,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:28,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599173614] [2020-09-16 13:54:28,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:28,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:28,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:28,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:28,514 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-16 13:54:28,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:28,916 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-09-16 13:54:28,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:54:28,918 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:28,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:28,919 INFO L225 Difference]: With dead ends: 189 [2020-09-16 13:54:28,919 INFO L226 Difference]: Without dead ends: 181 [2020-09-16 13:54:28,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:54:28,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-09-16 13:54:28,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-09-16 13:54:28,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-16 13:54:28,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-16 13:54:28,923 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-16 13:54:28,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:28,923 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-16 13:54:28,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:28,924 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-16 13:54:28,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:28,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:28,924 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:29,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:29,133 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:29,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:29,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1607573061, now seen corresponding path program 47 times [2020-09-16 13:54:29,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:29,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708906545] [2020-09-16 13:54:29,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:29,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708906545] [2020-09-16 13:54:29,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535946344] [2020-09-16 13:54:29,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:29,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:29,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:29,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:29,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:29,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:29,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:29,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021058297] [2020-09-16 13:54:29,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:29,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:29,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:29,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:29,364 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-16 13:54:29,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:29,660 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-09-16 13:54:29,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 13:54:29,660 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:29,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:29,667 INFO L225 Difference]: With dead ends: 169 [2020-09-16 13:54:29,667 INFO L226 Difference]: Without dead ends: 167 [2020-09-16 13:54:29,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:54:29,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-16 13:54:29,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-09-16 13:54:29,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-16 13:54:29,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-16 13:54:29,670 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-16 13:54:29,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:29,670 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-16 13:54:29,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:29,670 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-16 13:54:29,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:29,671 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:29,671 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:29,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-09-16 13:54:29,872 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:29,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:29,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1607594420, now seen corresponding path program 48 times [2020-09-16 13:54:29,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:29,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943825534] [2020-09-16 13:54:29,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:29,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943825534] [2020-09-16 13:54:29,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703607882] [2020-09-16 13:54:29,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:29,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:54:29,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:29,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:29,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:30,084 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:54:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:30,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:30,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:30,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536916557] [2020-09-16 13:54:30,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:30,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:30,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:30,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:30,094 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-16 13:54:30,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:30,490 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-09-16 13:54:30,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 13:54:30,491 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:30,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:30,492 INFO L225 Difference]: With dead ends: 192 [2020-09-16 13:54:30,492 INFO L226 Difference]: Without dead ends: 184 [2020-09-16 13:54:30,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:54:30,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-16 13:54:30,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-09-16 13:54:30,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-16 13:54:30,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-09-16 13:54:30,495 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-09-16 13:54:30,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:30,495 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-09-16 13:54:30,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:30,495 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-09-16 13:54:30,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:30,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:30,496 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:30,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:30,697 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:30,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:30,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1607595381, now seen corresponding path program 49 times [2020-09-16 13:54:30,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:30,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708217794] [2020-09-16 13:54:30,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:30,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708217794] [2020-09-16 13:54:30,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481427215] [2020-09-16 13:54:30,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:30,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:30,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:30,921 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:30,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:30,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:30,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906540816] [2020-09-16 13:54:30,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:30,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:30,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:30,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:30,935 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-09-16 13:54:31,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:31,324 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-09-16 13:54:31,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:54:31,325 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:31,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:31,326 INFO L225 Difference]: With dead ends: 180 [2020-09-16 13:54:31,327 INFO L226 Difference]: Without dead ends: 175 [2020-09-16 13:54:31,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-16 13:54:31,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-16 13:54:31,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-09-16 13:54:31,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-16 13:54:31,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-09-16 13:54:31,330 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-09-16 13:54:31,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:31,331 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-09-16 13:54:31,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:31,331 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-09-16 13:54:31,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:31,331 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:31,331 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:31,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-09-16 13:54:31,532 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:31,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:31,533 INFO L82 PathProgramCache]: Analyzing trace with hash -655922238, now seen corresponding path program 5 times [2020-09-16 13:54:31,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:31,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708579289] [2020-09-16 13:54:31,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:31,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708579289] [2020-09-16 13:54:31,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91087528] [2020-09-16 13:54:31,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:31,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:54:31,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:31,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:31,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:31,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:54:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:31,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:31,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-16 13:54:31,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365297460] [2020-09-16 13:54:31,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-16 13:54:31,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:31,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-16 13:54:31,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-09-16 13:54:31,868 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-09-16 13:54:32,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:32,044 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-09-16 13:54:32,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:54:32,044 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-09-16 13:54:32,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:32,046 INFO L225 Difference]: With dead ends: 164 [2020-09-16 13:54:32,046 INFO L226 Difference]: Without dead ends: 159 [2020-09-16 13:54:32,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-09-16 13:54:32,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-16 13:54:32,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-16 13:54:32,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-16 13:54:32,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-09-16 13:54:32,049 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-09-16 13:54:32,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:32,049 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-09-16 13:54:32,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-16 13:54:32,049 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-09-16 13:54:32,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:32,050 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:32,051 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:32,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:32,252 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:32,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:32,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1940751883, now seen corresponding path program 15 times [2020-09-16 13:54:32,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:32,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647066613] [2020-09-16 13:54:32,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:32,411 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:32,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647066613] [2020-09-16 13:54:32,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554890515] [2020-09-16 13:54:32,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:32,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:54:32,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:32,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:32,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:32,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:32,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:32,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089357325] [2020-09-16 13:54:32,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:32,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:32,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:32,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:32,630 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-09-16 13:54:32,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:32,694 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-16 13:54:32,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 13:54:32,695 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-16 13:54:32,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:32,696 INFO L225 Difference]: With dead ends: 156 [2020-09-16 13:54:32,696 INFO L226 Difference]: Without dead ends: 153 [2020-09-16 13:54:32,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:32,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-16 13:54:32,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-09-16 13:54:32,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-16 13:54:32,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-16 13:54:32,700 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-16 13:54:32,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:32,700 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-16 13:54:32,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:32,700 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-16 13:54:32,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:32,701 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:32,701 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:32,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-16 13:54:32,904 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:32,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:32,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1078904123, now seen corresponding path program 16 times [2020-09-16 13:54:32,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:32,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353957594] [2020-09-16 13:54:32,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:33,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353957594] [2020-09-16 13:54:33,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530570121] [2020-09-16 13:54:33,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:33,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:33,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:33,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:33,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:33,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:33,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:33,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946298825] [2020-09-16 13:54:33,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:33,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:33,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:33,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:33,241 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-16 13:54:33,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:33,320 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-09-16 13:54:33,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:54:33,321 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-16 13:54:33,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:33,322 INFO L225 Difference]: With dead ends: 170 [2020-09-16 13:54:33,322 INFO L226 Difference]: Without dead ends: 167 [2020-09-16 13:54:33,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-09-16 13:54:33,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-16 13:54:33,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-09-16 13:54:33,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-16 13:54:33,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-16 13:54:33,329 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-16 13:54:33,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:33,331 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-16 13:54:33,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:33,332 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-16 13:54:33,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:33,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:33,333 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:33,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:33,533 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:33,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:33,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1743839243, now seen corresponding path program 17 times [2020-09-16 13:54:33,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:33,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006725113] [2020-09-16 13:54:33,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:33,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006725113] [2020-09-16 13:54:33,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514299588] [2020-09-16 13:54:33,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:33,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:54:33,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:33,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:33,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:33,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:33,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:33,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275857542] [2020-09-16 13:54:33,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:33,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:33,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:33,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:33,831 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-16 13:54:33,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:33,935 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-09-16 13:54:33,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:54:33,935 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-16 13:54:33,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:33,937 INFO L225 Difference]: With dead ends: 169 [2020-09-16 13:54:33,937 INFO L226 Difference]: Without dead ends: 166 [2020-09-16 13:54:33,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:54:33,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-16 13:54:33,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-09-16 13:54:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-16 13:54:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-09-16 13:54:33,940 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-09-16 13:54:33,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:33,940 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-09-16 13:54:33,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:33,941 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-09-16 13:54:33,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:33,941 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:33,941 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:34,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:34,142 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:34,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:34,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1765288763, now seen corresponding path program 18 times [2020-09-16 13:54:34,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:34,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200052221] [2020-09-16 13:54:34,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:34,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200052221] [2020-09-16 13:54:34,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445038315] [2020-09-16 13:54:34,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:34,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:54:34,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:34,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:34,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:34,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:34,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:34,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838733704] [2020-09-16 13:54:34,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:34,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:34,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:34,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:34,453 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-09-16 13:54:34,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:34,581 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-09-16 13:54:34,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 13:54:34,582 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-16 13:54:34,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:34,583 INFO L225 Difference]: With dead ends: 168 [2020-09-16 13:54:34,583 INFO L226 Difference]: Without dead ends: 165 [2020-09-16 13:54:34,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-09-16 13:54:34,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-16 13:54:34,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-09-16 13:54:34,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-16 13:54:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-09-16 13:54:34,586 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-09-16 13:54:34,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:34,586 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-09-16 13:54:34,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:34,586 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-09-16 13:54:34,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:34,586 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:34,587 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:34,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-09-16 13:54:34,787 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:34,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:34,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1765980683, now seen corresponding path program 19 times [2020-09-16 13:54:34,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:34,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269712349] [2020-09-16 13:54:34,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:34,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269712349] [2020-09-16 13:54:34,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238206042] [2020-09-16 13:54:34,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:34,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:34,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:35,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:35,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:35,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706494771] [2020-09-16 13:54:35,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:35,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:35,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:35,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:35,105 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-09-16 13:54:35,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:35,269 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-09-16 13:54:35,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:35,270 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-16 13:54:35,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:35,271 INFO L225 Difference]: With dead ends: 167 [2020-09-16 13:54:35,271 INFO L226 Difference]: Without dead ends: 164 [2020-09-16 13:54:35,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-09-16 13:54:35,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-09-16 13:54:35,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-09-16 13:54:35,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-16 13:54:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-09-16 13:54:35,276 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-09-16 13:54:35,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:35,276 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-09-16 13:54:35,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:35,276 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-09-16 13:54:35,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:35,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:35,277 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:35,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:35,482 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:35,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:35,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1766003003, now seen corresponding path program 20 times [2020-09-16 13:54:35,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:35,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022497702] [2020-09-16 13:54:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:35,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:35,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022497702] [2020-09-16 13:54:35,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289642781] [2020-09-16 13:54:35,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:35,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:35,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:35,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:35,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:35,747 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:35,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:35,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:35,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743092404] [2020-09-16 13:54:35,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:35,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:35,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:35,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:35,762 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-09-16 13:54:35,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:35,996 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-09-16 13:54:35,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:54:35,997 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-16 13:54:35,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:35,998 INFO L225 Difference]: With dead ends: 176 [2020-09-16 13:54:35,998 INFO L226 Difference]: Without dead ends: 170 [2020-09-16 13:54:35,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:54:35,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-16 13:54:36,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-09-16 13:54:36,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-16 13:54:36,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-09-16 13:54:36,001 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-09-16 13:54:36,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:36,001 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-09-16 13:54:36,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:36,001 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-09-16 13:54:36,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:36,002 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:36,002 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:36,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:36,203 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:36,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:36,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1530333459, now seen corresponding path program 50 times [2020-09-16 13:54:36,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:36,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326282993] [2020-09-16 13:54:36,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:36,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326282993] [2020-09-16 13:54:36,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158975412] [2020-09-16 13:54:36,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:36,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:36,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:36,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:36,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:36,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:36,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:36,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500679842] [2020-09-16 13:54:36,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:36,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:36,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:36,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:36,531 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-09-16 13:54:36,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:36,596 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-09-16 13:54:36,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 13:54:36,597 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:36,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:36,598 INFO L225 Difference]: With dead ends: 163 [2020-09-16 13:54:36,598 INFO L226 Difference]: Without dead ends: 161 [2020-09-16 13:54:36,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:36,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-16 13:54:36,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-09-16 13:54:36,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-16 13:54:36,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-09-16 13:54:36,601 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-09-16 13:54:36,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:36,601 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-09-16 13:54:36,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:36,602 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-09-16 13:54:36,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:36,602 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:36,602 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:36,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-09-16 13:54:36,803 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:36,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:36,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1530332498, now seen corresponding path program 51 times [2020-09-16 13:54:36,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:36,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822071992] [2020-09-16 13:54:36,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:36,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:36,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822071992] [2020-09-16 13:54:36,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170263778] [2020-09-16 13:54:36,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:36,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:54:36,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:36,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:36,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:37,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:37,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:37,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887633840] [2020-09-16 13:54:37,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:37,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:37,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:37,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:37,112 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-09-16 13:54:37,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:37,285 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-09-16 13:54:37,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:54:37,286 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:37,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:37,287 INFO L225 Difference]: With dead ends: 172 [2020-09-16 13:54:37,287 INFO L226 Difference]: Without dead ends: 170 [2020-09-16 13:54:37,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-09-16 13:54:37,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-16 13:54:37,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-09-16 13:54:37,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-16 13:54:37,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-16 13:54:37,291 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-16 13:54:37,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:37,291 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-16 13:54:37,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:37,292 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-16 13:54:37,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:37,292 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:37,292 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:37,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:37,501 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:37,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:37,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1530303668, now seen corresponding path program 52 times [2020-09-16 13:54:37,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:37,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839948717] [2020-09-16 13:54:37,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:37,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839948717] [2020-09-16 13:54:37,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968041539] [2020-09-16 13:54:37,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:37,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:37,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:37,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:37,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:37,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:37,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:37,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894792936] [2020-09-16 13:54:37,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:37,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:37,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:37,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:37,875 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-16 13:54:38,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:38,110 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-16 13:54:38,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:54:38,111 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:38,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:38,113 INFO L225 Difference]: With dead ends: 179 [2020-09-16 13:54:38,113 INFO L226 Difference]: Without dead ends: 177 [2020-09-16 13:54:38,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-09-16 13:54:38,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-16 13:54:38,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-09-16 13:54:38,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-16 13:54:38,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-09-16 13:54:38,116 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-09-16 13:54:38,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:38,117 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-09-16 13:54:38,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:38,117 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-09-16 13:54:38,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:38,117 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:38,117 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:38,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-09-16 13:54:38,318 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:38,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:38,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1529409938, now seen corresponding path program 53 times [2020-09-16 13:54:38,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:38,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974119353] [2020-09-16 13:54:38,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:38,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:38,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974119353] [2020-09-16 13:54:38,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315027173] [2020-09-16 13:54:38,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:38,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:38,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:38,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:38,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:38,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:38,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:38,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:38,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587200439] [2020-09-16 13:54:38,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:38,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:38,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:38,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:38,639 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-09-16 13:54:38,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:38,869 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-16 13:54:38,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 13:54:38,870 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:38,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:38,871 INFO L225 Difference]: With dead ends: 179 [2020-09-16 13:54:38,872 INFO L226 Difference]: Without dead ends: 177 [2020-09-16 13:54:38,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:54:38,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-16 13:54:38,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-09-16 13:54:38,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-16 13:54:38,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-16 13:54:38,877 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-16 13:54:38,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:38,878 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-16 13:54:38,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:38,878 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-16 13:54:38,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:38,879 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:38,879 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:39,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-16 13:54:39,092 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:39,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:39,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1529408977, now seen corresponding path program 54 times [2020-09-16 13:54:39,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:39,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157427162] [2020-09-16 13:54:39,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:39,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157427162] [2020-09-16 13:54:39,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066028524] [2020-09-16 13:54:39,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:39,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:54:39,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:39,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:39,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:39,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:39,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:39,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647717007] [2020-09-16 13:54:39,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:39,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:39,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:39,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:39,468 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-16 13:54:39,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:39,761 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-09-16 13:54:39,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:39,762 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:39,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:39,764 INFO L225 Difference]: With dead ends: 184 [2020-09-16 13:54:39,764 INFO L226 Difference]: Without dead ends: 182 [2020-09-16 13:54:39,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:54:39,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-16 13:54:39,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-09-16 13:54:39,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-16 13:54:39,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-09-16 13:54:39,770 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-09-16 13:54:39,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:39,770 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-09-16 13:54:39,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:39,771 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-09-16 13:54:39,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:39,772 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:39,772 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:39,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-09-16 13:54:39,984 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:39,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:39,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1529380147, now seen corresponding path program 55 times [2020-09-16 13:54:39,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:39,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165824032] [2020-09-16 13:54:39,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:40,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165824032] [2020-09-16 13:54:40,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675935172] [2020-09-16 13:54:40,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:40,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:40,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:40,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:40,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:40,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:40,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366148716] [2020-09-16 13:54:40,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:40,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:40,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:40,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:40,292 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-09-16 13:54:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:40,533 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-09-16 13:54:40,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:40,533 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:40,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:40,535 INFO L225 Difference]: With dead ends: 179 [2020-09-16 13:54:40,535 INFO L226 Difference]: Without dead ends: 177 [2020-09-16 13:54:40,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:54:40,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-16 13:54:40,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-09-16 13:54:40,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-16 13:54:40,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-09-16 13:54:40,539 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-09-16 13:54:40,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:40,539 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-09-16 13:54:40,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:40,539 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-09-16 13:54:40,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:40,540 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:40,540 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:40,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:40,741 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:40,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:40,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1501704308, now seen corresponding path program 56 times [2020-09-16 13:54:40,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:40,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726892737] [2020-09-16 13:54:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:40,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726892737] [2020-09-16 13:54:40,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143759753] [2020-09-16 13:54:40,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:40,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:40,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:40,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:40,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:41,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:41,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:41,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096386982] [2020-09-16 13:54:41,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:41,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:41,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:41,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:41,059 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-09-16 13:54:41,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:41,255 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-09-16 13:54:41,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:54:41,256 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:41,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:41,258 INFO L225 Difference]: With dead ends: 176 [2020-09-16 13:54:41,258 INFO L226 Difference]: Without dead ends: 174 [2020-09-16 13:54:41,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-16 13:54:41,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-09-16 13:54:41,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-09-16 13:54:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-16 13:54:41,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-09-16 13:54:41,262 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-09-16 13:54:41,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:41,262 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-09-16 13:54:41,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:41,263 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-09-16 13:54:41,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:41,263 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:41,263 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:41,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:41,475 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:41,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:41,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1501703347, now seen corresponding path program 57 times [2020-09-16 13:54:41,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:41,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818871535] [2020-09-16 13:54:41,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:41,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818871535] [2020-09-16 13:54:41,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138512138] [2020-09-16 13:54:41,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:41,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:54:41,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:41,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:41,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:41,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:41,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:41,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851602186] [2020-09-16 13:54:41,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:41,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:41,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:41,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:41,799 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-09-16 13:54:42,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:42,048 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-09-16 13:54:42,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:42,049 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:42,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:42,050 INFO L225 Difference]: With dead ends: 185 [2020-09-16 13:54:42,051 INFO L226 Difference]: Without dead ends: 183 [2020-09-16 13:54:42,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:54:42,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-16 13:54:42,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-09-16 13:54:42,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-16 13:54:42,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-09-16 13:54:42,054 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-09-16 13:54:42,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:42,054 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-09-16 13:54:42,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:42,054 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-09-16 13:54:42,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:42,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:42,054 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:42,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:42,255 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:42,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:42,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1501674517, now seen corresponding path program 58 times [2020-09-16 13:54:42,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:42,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832959630] [2020-09-16 13:54:42,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:42,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:42,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832959630] [2020-09-16 13:54:42,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596842997] [2020-09-16 13:54:42,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:42,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:42,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:42,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:42,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:42,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:42,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:42,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034186105] [2020-09-16 13:54:42,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:42,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:42,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:42,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:42,544 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-09-16 13:54:42,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:42,800 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-09-16 13:54:42,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:42,801 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:42,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:42,803 INFO L225 Difference]: With dead ends: 185 [2020-09-16 13:54:42,803 INFO L226 Difference]: Without dead ends: 183 [2020-09-16 13:54:42,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:54:42,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-16 13:54:42,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-09-16 13:54:42,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-16 13:54:42,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-09-16 13:54:42,809 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-09-16 13:54:42,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:42,809 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-09-16 13:54:42,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:42,810 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-09-16 13:54:42,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:42,811 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:42,811 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:43,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:43,024 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:43,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:43,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911547, now seen corresponding path program 59 times [2020-09-16 13:54:43,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:43,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611486483] [2020-09-16 13:54:43,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:43,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611486483] [2020-09-16 13:54:43,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655173735] [2020-09-16 13:54:43,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:43,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:54:43,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:43,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:43,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:43,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:43,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:43,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69473606] [2020-09-16 13:54:43,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:43,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:43,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:43,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:43,364 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-09-16 13:54:43,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:43,442 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-09-16 13:54:43,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:54:43,443 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:43,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:43,444 INFO L225 Difference]: With dead ends: 182 [2020-09-16 13:54:43,445 INFO L226 Difference]: Without dead ends: 180 [2020-09-16 13:54:43,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-09-16 13:54:43,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-16 13:54:43,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-09-16 13:54:43,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-16 13:54:43,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-09-16 13:54:43,448 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-09-16 13:54:43,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:43,448 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-09-16 13:54:43,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:43,449 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-09-16 13:54:43,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:43,449 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:43,449 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:43,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-09-16 13:54:43,655 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:43,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:43,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1043912508, now seen corresponding path program 60 times [2020-09-16 13:54:43,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:43,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042809423] [2020-09-16 13:54:43,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:43,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042809423] [2020-09-16 13:54:43,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623867326] [2020-09-16 13:54:43,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:43,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:54:43,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:43,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:43,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:43,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:43,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:43,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198944575] [2020-09-16 13:54:43,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:43,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:43,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:43,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:43,997 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-09-16 13:54:44,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:44,223 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-09-16 13:54:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 13:54:44,224 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:44,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:44,225 INFO L225 Difference]: With dead ends: 185 [2020-09-16 13:54:44,225 INFO L226 Difference]: Without dead ends: 183 [2020-09-16 13:54:44,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-09-16 13:54:44,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-16 13:54:44,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-09-16 13:54:44,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-16 13:54:44,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-16 13:54:44,230 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-16 13:54:44,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:44,230 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-16 13:54:44,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:44,230 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-16 13:54:44,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:44,231 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:44,231 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:44,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:44,432 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:44,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:44,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1043941338, now seen corresponding path program 61 times [2020-09-16 13:54:44,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:44,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964590973] [2020-09-16 13:54:44,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:44,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964590973] [2020-09-16 13:54:44,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636283386] [2020-09-16 13:54:44,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:44,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:44,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:44,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:44,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:44,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289876227] [2020-09-16 13:54:44,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:44,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:44,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:44,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:44,803 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-16 13:54:45,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:45,070 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-09-16 13:54:45,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 13:54:45,071 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:45,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:45,073 INFO L225 Difference]: With dead ends: 191 [2020-09-16 13:54:45,073 INFO L226 Difference]: Without dead ends: 189 [2020-09-16 13:54:45,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:54:45,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-16 13:54:45,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-09-16 13:54:45,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-16 13:54:45,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-09-16 13:54:45,076 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-09-16 13:54:45,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:45,077 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-09-16 13:54:45,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:45,077 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-09-16 13:54:45,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:45,078 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:45,078 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:45,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:45,288 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:45,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:45,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1044835068, now seen corresponding path program 62 times [2020-09-16 13:54:45,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:45,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948477976] [2020-09-16 13:54:45,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:45,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948477976] [2020-09-16 13:54:45,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390467073] [2020-09-16 13:54:45,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:45,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:45,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:45,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:45,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:45,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:45,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:45,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46294157] [2020-09-16 13:54:45,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:45,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:45,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:45,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:45,632 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-09-16 13:54:45,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:45,957 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-09-16 13:54:45,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:54:45,958 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:45,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:45,960 INFO L225 Difference]: With dead ends: 187 [2020-09-16 13:54:45,960 INFO L226 Difference]: Without dead ends: 185 [2020-09-16 13:54:45,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:54:45,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-16 13:54:45,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-09-16 13:54:45,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-16 13:54:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-16 13:54:45,965 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-16 13:54:45,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:45,966 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-16 13:54:45,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:45,966 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-16 13:54:45,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:45,967 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:45,967 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:46,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-09-16 13:54:46,181 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:46,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:46,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1044836029, now seen corresponding path program 63 times [2020-09-16 13:54:46,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:46,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724514535] [2020-09-16 13:54:46,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:46,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724514535] [2020-09-16 13:54:46,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027099132] [2020-09-16 13:54:46,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:46,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:54:46,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:46,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:46,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:46,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:46,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:46,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163345664] [2020-09-16 13:54:46,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:46,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:46,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:46,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:46,459 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-16 13:54:46,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:46,774 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-09-16 13:54:46,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:54:46,775 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:46,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:46,776 INFO L225 Difference]: With dead ends: 198 [2020-09-16 13:54:46,776 INFO L226 Difference]: Without dead ends: 196 [2020-09-16 13:54:46,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:54:46,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-16 13:54:46,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-09-16 13:54:46,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-16 13:54:46,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-09-16 13:54:46,780 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-09-16 13:54:46,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:46,781 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-09-16 13:54:46,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:46,781 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-09-16 13:54:46,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:46,781 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:46,782 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:46,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:46,987 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:46,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:46,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1044864859, now seen corresponding path program 64 times [2020-09-16 13:54:46,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:46,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648584934] [2020-09-16 13:54:46,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:47,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648584934] [2020-09-16 13:54:47,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389003637] [2020-09-16 13:54:47,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:47,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:47,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:47,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:47,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:47,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:47,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:47,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457809208] [2020-09-16 13:54:47,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:47,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:47,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:47,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:47,304 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-09-16 13:54:47,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:47,625 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-09-16 13:54:47,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:54:47,625 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:47,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:47,627 INFO L225 Difference]: With dead ends: 189 [2020-09-16 13:54:47,627 INFO L226 Difference]: Without dead ends: 187 [2020-09-16 13:54:47,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:54:47,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-16 13:54:47,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-09-16 13:54:47,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-16 13:54:47,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-09-16 13:54:47,631 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-09-16 13:54:47,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:47,631 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-09-16 13:54:47,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:47,631 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-09-16 13:54:47,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:47,632 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:47,632 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:47,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-09-16 13:54:47,841 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:47,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:47,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141037, now seen corresponding path program 65 times [2020-09-16 13:54:47,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:47,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135303219] [2020-09-16 13:54:47,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:47,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135303219] [2020-09-16 13:54:47,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485502740] [2020-09-16 13:54:47,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:48,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:54:48,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:48,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:48,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:48,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:48,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:48,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601068377] [2020-09-16 13:54:48,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:48,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:48,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:48,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:48,171 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-09-16 13:54:48,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:48,284 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-09-16 13:54:48,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:54:48,285 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:48,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:48,286 INFO L225 Difference]: With dead ends: 178 [2020-09-16 13:54:48,287 INFO L226 Difference]: Without dead ends: 176 [2020-09-16 13:54:48,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:54:48,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-09-16 13:54:48,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-09-16 13:54:48,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-16 13:54:48,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-09-16 13:54:48,291 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-09-16 13:54:48,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:48,291 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-09-16 13:54:48,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:48,291 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-09-16 13:54:48,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:48,291 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:48,292 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:48,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:48,493 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:48,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:48,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141998, now seen corresponding path program 66 times [2020-09-16 13:54:48,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:48,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429999425] [2020-09-16 13:54:48,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:48,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:48,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429999425] [2020-09-16 13:54:48,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571878142] [2020-09-16 13:54:48,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:48,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:54:48,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:48,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:48,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:48,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:48,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:48,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523274989] [2020-09-16 13:54:48,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:48,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:48,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:48,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:48,802 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-09-16 13:54:49,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:49,035 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-09-16 13:54:49,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:54:49,036 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:49,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:49,037 INFO L225 Difference]: With dead ends: 193 [2020-09-16 13:54:49,037 INFO L226 Difference]: Without dead ends: 191 [2020-09-16 13:54:49,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:54:49,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-16 13:54:49,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-09-16 13:54:49,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-16 13:54:49,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-09-16 13:54:49,042 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-09-16 13:54:49,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:49,042 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-09-16 13:54:49,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:49,042 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-09-16 13:54:49,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:49,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:49,043 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:49,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-09-16 13:54:49,250 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:49,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:49,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1681170828, now seen corresponding path program 67 times [2020-09-16 13:54:49,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:49,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744734762] [2020-09-16 13:54:49,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:49,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:49,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744734762] [2020-09-16 13:54:49,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808981976] [2020-09-16 13:54:49,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:49,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:49,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:50,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:50,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:50,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241681835] [2020-09-16 13:54:50,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:50,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:50,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:50,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:50,600 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-09-16 13:54:50,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:50,913 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-09-16 13:54:50,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:54:50,913 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:50,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:50,915 INFO L225 Difference]: With dead ends: 195 [2020-09-16 13:54:50,915 INFO L226 Difference]: Without dead ends: 193 [2020-09-16 13:54:50,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-09-16 13:54:50,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-16 13:54:50,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-09-16 13:54:50,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-16 13:54:50,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-09-16 13:54:50,920 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-09-16 13:54:50,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:50,921 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-09-16 13:54:50,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:50,921 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-09-16 13:54:50,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:50,921 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:50,922 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:51,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:51,132 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:51,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:51,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1701696827, now seen corresponding path program 68 times [2020-09-16 13:54:51,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:51,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736755584] [2020-09-16 13:54:51,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:51,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736755584] [2020-09-16 13:54:51,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628599604] [2020-09-16 13:54:51,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:51,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:51,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:51,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:51,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:51,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:51,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:51,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285308718] [2020-09-16 13:54:51,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:51,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:51,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:51,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:51,444 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-09-16 13:54:51,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:51,566 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-09-16 13:54:51,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 13:54:51,566 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:51,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:51,568 INFO L225 Difference]: With dead ends: 174 [2020-09-16 13:54:51,568 INFO L226 Difference]: Without dead ends: 172 [2020-09-16 13:54:51,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-09-16 13:54:51,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-16 13:54:51,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-09-16 13:54:51,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-16 13:54:51,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-09-16 13:54:51,571 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-09-16 13:54:51,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:51,571 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-09-16 13:54:51,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:51,572 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-09-16 13:54:51,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:51,572 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:51,572 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:51,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-09-16 13:54:51,773 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:51,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:51,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1701697788, now seen corresponding path program 69 times [2020-09-16 13:54:51,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:51,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609280088] [2020-09-16 13:54:51,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:51,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609280088] [2020-09-16 13:54:51,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572263537] [2020-09-16 13:54:51,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:51,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:54:51,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:51,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:51,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:52,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:52,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:52,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:52,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176345967] [2020-09-16 13:54:52,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:52,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:52,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:52,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:52,084 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-09-16 13:54:52,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:52,365 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-09-16 13:54:52,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:54:52,366 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:52,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:52,367 INFO L225 Difference]: With dead ends: 189 [2020-09-16 13:54:52,367 INFO L226 Difference]: Without dead ends: 187 [2020-09-16 13:54:52,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-09-16 13:54:52,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-16 13:54:52,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-09-16 13:54:52,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-16 13:54:52,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-09-16 13:54:52,371 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-09-16 13:54:52,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:52,371 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-09-16 13:54:52,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:52,371 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-09-16 13:54:52,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:52,372 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:52,372 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:52,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:52,579 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:52,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:52,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1702359917, now seen corresponding path program 70 times [2020-09-16 13:54:52,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:52,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717003268] [2020-09-16 13:54:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:52,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:52,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717003268] [2020-09-16 13:54:52,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507267016] [2020-09-16 13:54:52,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:52,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:52,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:52,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:52,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:52,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:52,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:52,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179718797] [2020-09-16 13:54:52,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:52,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:52,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:52,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:52,882 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-09-16 13:54:53,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:53,048 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-09-16 13:54:53,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:53,049 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:53,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:53,051 INFO L225 Difference]: With dead ends: 175 [2020-09-16 13:54:53,051 INFO L226 Difference]: Without dead ends: 173 [2020-09-16 13:54:53,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-09-16 13:54:53,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-16 13:54:53,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-09-16 13:54:53,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-16 13:54:53,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-16 13:54:53,055 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-16 13:54:53,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:53,055 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-16 13:54:53,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:53,055 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-16 13:54:53,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:53,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:53,056 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:53,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:53,258 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:53,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:53,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1702382237, now seen corresponding path program 71 times [2020-09-16 13:54:53,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:53,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539628065] [2020-09-16 13:54:53,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:53,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539628065] [2020-09-16 13:54:53,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785686970] [2020-09-16 13:54:53,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:53,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:54:53,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:53,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:53,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:53,535 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:53,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:53,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:53,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777802668] [2020-09-16 13:54:53,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:53,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:53,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:53,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:53,570 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-16 13:54:53,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:53,929 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-09-16 13:54:53,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:54:53,930 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:53,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:53,931 INFO L225 Difference]: With dead ends: 195 [2020-09-16 13:54:53,932 INFO L226 Difference]: Without dead ends: 190 [2020-09-16 13:54:53,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:54:53,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-16 13:54:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-09-16 13:54:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-16 13:54:53,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-16 13:54:53,935 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-16 13:54:53,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:53,935 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-16 13:54:53,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:53,936 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-16 13:54:53,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:53,936 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:53,936 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:54,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:54,137 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:54,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:54,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1702389708, now seen corresponding path program 72 times [2020-09-16 13:54:54,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:54,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210489517] [2020-09-16 13:54:54,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:54,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210489517] [2020-09-16 13:54:54,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027920621] [2020-09-16 13:54:54,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:54,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:54:54,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:54,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:54,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:54,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:54,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:54,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:54,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142259026] [2020-09-16 13:54:54,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:54,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:54,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:54,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:54,434 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-16 13:54:54,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:54,740 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-09-16 13:54:54,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 13:54:54,741 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:54,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:54,742 INFO L225 Difference]: With dead ends: 187 [2020-09-16 13:54:54,742 INFO L226 Difference]: Without dead ends: 185 [2020-09-16 13:54:54,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:54:54,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-16 13:54:54,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-09-16 13:54:54,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-16 13:54:54,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-16 13:54:54,746 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-16 13:54:54,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:54,746 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-16 13:54:54,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:54,747 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-16 13:54:54,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:54,747 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:54,747 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:54,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:54,948 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:54,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:54,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1702411067, now seen corresponding path program 73 times [2020-09-16 13:54:54,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:54,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68677043] [2020-09-16 13:54:54,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:55,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68677043] [2020-09-16 13:54:55,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021516295] [2020-09-16 13:54:55,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:55,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:55,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:55,231 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:54:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:55,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:55,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:55,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281858776] [2020-09-16 13:54:55,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:55,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:55,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:55,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:55,276 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-16 13:54:55,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:55,805 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-09-16 13:54:55,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:54:55,805 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:55,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:55,807 INFO L225 Difference]: With dead ends: 212 [2020-09-16 13:54:55,807 INFO L226 Difference]: Without dead ends: 207 [2020-09-16 13:54:55,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-09-16 13:54:55,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-16 13:54:55,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-16 13:54:55,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-16 13:54:55,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-16 13:54:55,811 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-16 13:54:55,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:55,811 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-16 13:54:55,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:55,811 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-16 13:54:55,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:55,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:55,812 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:56,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-09-16 13:54:56,014 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:56,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:56,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1702412028, now seen corresponding path program 74 times [2020-09-16 13:54:56,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:56,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340548228] [2020-09-16 13:54:56,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:56,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:56,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340548228] [2020-09-16 13:54:56,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264706400] [2020-09-16 13:54:56,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:56,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:56,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:56,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:56,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:56,290 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:56,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:56,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:56,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053937838] [2020-09-16 13:54:56,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:56,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:56,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:56,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:56,322 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-16 13:54:56,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:56,706 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-16 13:54:56,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:54:56,707 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:56,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:56,708 INFO L225 Difference]: With dead ends: 202 [2020-09-16 13:54:56,708 INFO L226 Difference]: Without dead ends: 197 [2020-09-16 13:54:56,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:54:56,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-16 13:54:56,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-09-16 13:54:56,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-16 13:54:56,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-09-16 13:54:56,712 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-09-16 13:54:56,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:56,713 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-09-16 13:54:56,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:56,713 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-09-16 13:54:56,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:56,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:56,714 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:56,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:56,914 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:56,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:56,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1702620348, now seen corresponding path program 75 times [2020-09-16 13:54:56,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:56,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121967591] [2020-09-16 13:54:56,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:57,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:57,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121967591] [2020-09-16 13:54:57,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740332146] [2020-09-16 13:54:57,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:57,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:54:57,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:57,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:57,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:57,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:57,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:57,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698329505] [2020-09-16 13:54:57,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:57,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:57,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:57,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:57,276 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-09-16 13:54:57,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:57,619 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-09-16 13:54:57,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:54:57,619 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:57,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:57,621 INFO L225 Difference]: With dead ends: 198 [2020-09-16 13:54:57,622 INFO L226 Difference]: Without dead ends: 196 [2020-09-16 13:54:57,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:54:57,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-16 13:54:57,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-09-16 13:54:57,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-16 13:54:57,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-16 13:54:57,626 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-16 13:54:57,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:57,626 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-16 13:54:57,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:57,627 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-16 13:54:57,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:57,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:57,627 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:57,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-16 13:54:57,832 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:57,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:57,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1703283438, now seen corresponding path program 76 times [2020-09-16 13:54:57,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:57,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98408439] [2020-09-16 13:54:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:57,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98408439] [2020-09-16 13:54:57,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524463716] [2020-09-16 13:54:57,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:57,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:57,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:57,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:57,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:58,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:58,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:58,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705672553] [2020-09-16 13:54:58,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:58,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:58,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:58,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:58,175 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-16 13:54:58,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:58,659 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-09-16 13:54:58,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 13:54:58,660 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:58,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:58,661 INFO L225 Difference]: With dead ends: 209 [2020-09-16 13:54:58,662 INFO L226 Difference]: Without dead ends: 207 [2020-09-16 13:54:58,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-09-16 13:54:58,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-16 13:54:58,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-16 13:54:58,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-16 13:54:58,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-16 13:54:58,665 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-16 13:54:58,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:58,665 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-16 13:54:58,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:58,665 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-16 13:54:58,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:58,666 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:58,666 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:58,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-16 13:54:58,867 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:58,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:58,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1703304797, now seen corresponding path program 77 times [2020-09-16 13:54:58,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:58,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707008170] [2020-09-16 13:54:58,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:58,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:58,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707008170] [2020-09-16 13:54:58,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690188094] [2020-09-16 13:54:58,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:59,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:54:59,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:59,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:59,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:59,153 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:54:59,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:59,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:59,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:59,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194202140] [2020-09-16 13:54:59,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:59,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:59,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:59,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:59,199 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-16 13:54:59,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:59,852 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-09-16 13:54:59,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 13:54:59,852 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:59,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:59,854 INFO L225 Difference]: With dead ends: 217 [2020-09-16 13:54:59,854 INFO L226 Difference]: Without dead ends: 212 [2020-09-16 13:54:59,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-09-16 13:54:59,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-16 13:54:59,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-09-16 13:54:59,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-16 13:54:59,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-09-16 13:54:59,859 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-09-16 13:54:59,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:59,859 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-09-16 13:54:59,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:59,859 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-09-16 13:54:59,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:59,860 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:59,860 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:00,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-09-16 13:55:00,066 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:00,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:00,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1703305758, now seen corresponding path program 78 times [2020-09-16 13:55:00,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:00,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252435777] [2020-09-16 13:55:00,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:00,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252435777] [2020-09-16 13:55:00,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330428132] [2020-09-16 13:55:00,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:00,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:55:00,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:00,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:00,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:02,408 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:55:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:02,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:02,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:02,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015407981] [2020-09-16 13:55:02,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:02,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:02,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:02,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-09-16 13:55:02,448 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-09-16 13:55:06,797 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-16 13:55:11,033 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-09-16 13:55:11,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:11,545 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-09-16 13:55:11,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 13:55:11,546 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:11,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:11,547 INFO L225 Difference]: With dead ends: 236 [2020-09-16 13:55:11,547 INFO L226 Difference]: Without dead ends: 228 [2020-09-16 13:55:11,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-09-16 13:55:11,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-16 13:55:11,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-09-16 13:55:11,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-16 13:55:11,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-09-16 13:55:11,551 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-09-16 13:55:11,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:11,551 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-09-16 13:55:11,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:11,551 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-09-16 13:55:11,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:11,552 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:11,552 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:11,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-16 13:55:11,753 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:11,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:11,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1703334588, now seen corresponding path program 79 times [2020-09-16 13:55:11,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:11,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473286567] [2020-09-16 13:55:11,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:11,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:11,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473286567] [2020-09-16 13:55:11,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595707611] [2020-09-16 13:55:11,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:11,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:11,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:12,075 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:55:12,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:55:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:12,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:12,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:12,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456086811] [2020-09-16 13:55:12,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:12,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:12,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:12,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:12,120 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-09-16 13:55:12,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:12,764 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-09-16 13:55:12,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 13:55:12,765 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:12,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:12,766 INFO L225 Difference]: With dead ends: 219 [2020-09-16 13:55:12,766 INFO L226 Difference]: Without dead ends: 214 [2020-09-16 13:55:12,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-09-16 13:55:12,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-16 13:55:12,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-09-16 13:55:12,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-16 13:55:12,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-09-16 13:55:12,768 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-09-16 13:55:12,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:12,769 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-09-16 13:55:12,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:12,769 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-09-16 13:55:12,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:12,769 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:12,769 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:12,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:12,972 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:12,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:12,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1709770188, now seen corresponding path program 80 times [2020-09-16 13:55:12,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:12,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89453041] [2020-09-16 13:55:12,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:13,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89453041] [2020-09-16 13:55:13,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057751095] [2020-09-16 13:55:13,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:13,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:55:13,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:13,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:13,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:13,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:13,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:13,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:13,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927665005] [2020-09-16 13:55:13,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:13,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:13,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:13,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:13,305 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-09-16 13:55:13,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:13,616 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-09-16 13:55:13,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:55:13,617 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:13,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:13,618 INFO L225 Difference]: With dead ends: 197 [2020-09-16 13:55:13,618 INFO L226 Difference]: Without dead ends: 195 [2020-09-16 13:55:13,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:55:13,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-16 13:55:13,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-09-16 13:55:13,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-16 13:55:13,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-09-16 13:55:13,621 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-09-16 13:55:13,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:13,622 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-09-16 13:55:13,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:13,622 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-09-16 13:55:13,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:13,622 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:13,623 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:13,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:13,829 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:13,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:13,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1709771149, now seen corresponding path program 81 times [2020-09-16 13:55:13,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:13,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091138153] [2020-09-16 13:55:13,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:13,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:13,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091138153] [2020-09-16 13:55:13,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549843079] [2020-09-16 13:55:13,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:13,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:55:13,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:13,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:13,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:14,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:14,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:14,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581997837] [2020-09-16 13:55:14,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:14,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:14,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:14,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:14,129 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-09-16 13:55:14,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:14,454 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-09-16 13:55:14,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:55:14,455 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:14,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:14,456 INFO L225 Difference]: With dead ends: 202 [2020-09-16 13:55:14,456 INFO L226 Difference]: Without dead ends: 200 [2020-09-16 13:55:14,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:55:14,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-16 13:55:14,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-09-16 13:55:14,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-16 13:55:14,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-09-16 13:55:14,460 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-09-16 13:55:14,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:14,460 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-09-16 13:55:14,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:14,461 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-09-16 13:55:14,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:14,461 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:14,461 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:14,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-09-16 13:55:14,673 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:14,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:14,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1709799979, now seen corresponding path program 82 times [2020-09-16 13:55:14,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:14,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797882485] [2020-09-16 13:55:14,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:14,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797882485] [2020-09-16 13:55:14,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428942901] [2020-09-16 13:55:14,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:14,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:55:14,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:14,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:14,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:14,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:14,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:14,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060850430] [2020-09-16 13:55:14,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:14,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:14,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:14,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:14,998 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-09-16 13:55:15,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:15,344 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-09-16 13:55:15,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:55:15,345 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:15,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:15,346 INFO L225 Difference]: With dead ends: 197 [2020-09-16 13:55:15,346 INFO L226 Difference]: Without dead ends: 195 [2020-09-16 13:55:15,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:55:15,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-16 13:55:15,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-09-16 13:55:15,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-16 13:55:15,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-09-16 13:55:15,348 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-09-16 13:55:15,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:15,348 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-09-16 13:55:15,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:15,349 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-09-16 13:55:15,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:15,349 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:15,349 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:15,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-16 13:55:15,550 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:15,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:15,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1730325978, now seen corresponding path program 83 times [2020-09-16 13:55:15,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:15,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474988960] [2020-09-16 13:55:15,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:15,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474988960] [2020-09-16 13:55:15,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616473800] [2020-09-16 13:55:15,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:15,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:55:15,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:15,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:15,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:15,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:15,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:15,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003396026] [2020-09-16 13:55:15,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:15,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:15,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:15,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:15,907 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-09-16 13:55:16,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:16,452 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-09-16 13:55:16,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-16 13:55:16,452 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:16,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:16,453 INFO L225 Difference]: With dead ends: 214 [2020-09-16 13:55:16,453 INFO L226 Difference]: Without dead ends: 212 [2020-09-16 13:55:16,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-09-16 13:55:16,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-16 13:55:16,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-09-16 13:55:16,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-16 13:55:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-09-16 13:55:16,457 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-09-16 13:55:16,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:16,458 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-09-16 13:55:16,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:16,458 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-09-16 13:55:16,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:16,458 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:16,459 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:16,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-16 13:55:16,669 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:16,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:16,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1730326939, now seen corresponding path program 84 times [2020-09-16 13:55:16,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:16,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931913211] [2020-09-16 13:55:16,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:16,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931913211] [2020-09-16 13:55:16,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366887823] [2020-09-16 13:55:16,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:16,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:55:16,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:16,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:16,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:16,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:16,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:16,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:16,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722780606] [2020-09-16 13:55:16,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:16,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:16,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:16,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:16,958 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-09-16 13:55:17,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:17,435 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-09-16 13:55:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 13:55:17,436 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:17,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:17,437 INFO L225 Difference]: With dead ends: 217 [2020-09-16 13:55:17,437 INFO L226 Difference]: Without dead ends: 215 [2020-09-16 13:55:17,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:55:17,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-16 13:55:17,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-09-16 13:55:17,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-16 13:55:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-16 13:55:17,441 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-16 13:55:17,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:17,441 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-16 13:55:17,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:17,442 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-16 13:55:17,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:17,442 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:17,442 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:17,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:17,651 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:17,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:17,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1730989068, now seen corresponding path program 85 times [2020-09-16 13:55:17,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:17,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226910141] [2020-09-16 13:55:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:17,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226910141] [2020-09-16 13:55:17,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644375628] [2020-09-16 13:55:17,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:17,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:17,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:17,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:17,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:17,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382862651] [2020-09-16 13:55:17,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:17,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:17,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:17,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:17,969 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-16 13:55:18,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:18,479 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-09-16 13:55:18,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 13:55:18,480 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:18,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:18,481 INFO L225 Difference]: With dead ends: 211 [2020-09-16 13:55:18,481 INFO L226 Difference]: Without dead ends: 209 [2020-09-16 13:55:18,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-09-16 13:55:18,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-16 13:55:18,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-09-16 13:55:18,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-16 13:55:18,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-16 13:55:18,485 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-16 13:55:18,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:18,485 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-16 13:55:18,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:18,485 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-16 13:55:18,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:18,486 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:18,486 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:18,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:18,688 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:18,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:18,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1731010427, now seen corresponding path program 86 times [2020-09-16 13:55:18,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:18,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717159702] [2020-09-16 13:55:18,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:18,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717159702] [2020-09-16 13:55:18,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090806054] [2020-09-16 13:55:18,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:18,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:55:18,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:18,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:18,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:18,982 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:55:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:18,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:18,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:18,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141385208] [2020-09-16 13:55:18,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:18,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:18,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:18,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:18,996 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-16 13:55:19,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:19,583 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-09-16 13:55:19,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 13:55:19,584 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:19,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:19,585 INFO L225 Difference]: With dead ends: 211 [2020-09-16 13:55:19,585 INFO L226 Difference]: Without dead ends: 206 [2020-09-16 13:55:19,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-09-16 13:55:19,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-16 13:55:19,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-09-16 13:55:19,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-16 13:55:19,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-16 13:55:19,588 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-16 13:55:19,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:19,588 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-16 13:55:19,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:19,589 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-16 13:55:19,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:19,589 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:19,589 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:19,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-16 13:55:19,790 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:19,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:19,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1731011388, now seen corresponding path program 87 times [2020-09-16 13:55:19,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:19,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489745425] [2020-09-16 13:55:19,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:19,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489745425] [2020-09-16 13:55:19,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458102612] [2020-09-16 13:55:19,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:19,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:55:19,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:19,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:19,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:20,070 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:55:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:20,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:20,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:20,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039859120] [2020-09-16 13:55:20,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:20,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:20,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:20,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:20,115 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-16 13:55:20,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:20,817 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-09-16 13:55:20,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 13:55:20,818 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:20,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:20,820 INFO L225 Difference]: With dead ends: 227 [2020-09-16 13:55:20,820 INFO L226 Difference]: Without dead ends: 222 [2020-09-16 13:55:20,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-09-16 13:55:20,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-16 13:55:20,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-09-16 13:55:20,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-16 13:55:20,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-16 13:55:20,824 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-16 13:55:20,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:20,824 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-16 13:55:20,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:20,824 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-16 13:55:20,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:20,825 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:20,825 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:21,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-09-16 13:55:21,038 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:21,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:21,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1731018859, now seen corresponding path program 88 times [2020-09-16 13:55:21,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:21,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690377487] [2020-09-16 13:55:21,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:21,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690377487] [2020-09-16 13:55:21,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894955224] [2020-09-16 13:55:21,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:21,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:55:21,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:21,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:21,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:21,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:21,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:21,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119661022] [2020-09-16 13:55:21,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:21,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:21,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:21,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:21,338 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-16 13:55:21,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:21,911 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-09-16 13:55:21,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 13:55:21,912 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:21,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:21,912 INFO L225 Difference]: With dead ends: 221 [2020-09-16 13:55:21,913 INFO L226 Difference]: Without dead ends: 219 [2020-09-16 13:55:21,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-09-16 13:55:21,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-16 13:55:21,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-09-16 13:55:21,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-16 13:55:21,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-16 13:55:21,916 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-16 13:55:21,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:21,917 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-16 13:55:21,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:21,917 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-16 13:55:21,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:21,917 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:21,917 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:22,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:22,121 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:22,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:22,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1731040218, now seen corresponding path program 89 times [2020-09-16 13:55:22,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:22,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146969535] [2020-09-16 13:55:22,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:22,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146969535] [2020-09-16 13:55:22,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342526554] [2020-09-16 13:55:22,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:22,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:55:22,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:22,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:22,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:22,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:55:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:22,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:22,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:22,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932679811] [2020-09-16 13:55:22,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:22,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:22,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:22,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:22,415 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-16 13:55:23,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:23,128 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-09-16 13:55:23,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 13:55:23,129 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:23,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:23,130 INFO L225 Difference]: With dead ends: 240 [2020-09-16 13:55:23,130 INFO L226 Difference]: Without dead ends: 232 [2020-09-16 13:55:23,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-09-16 13:55:23,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-16 13:55:23,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-09-16 13:55:23,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-16 13:55:23,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-09-16 13:55:23,134 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-09-16 13:55:23,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:23,135 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-09-16 13:55:23,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:23,135 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-09-16 13:55:23,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:23,135 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:23,135 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:23,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-16 13:55:23,336 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:23,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:23,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041179, now seen corresponding path program 90 times [2020-09-16 13:55:23,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:23,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044201295] [2020-09-16 13:55:23,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:23,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044201295] [2020-09-16 13:55:23,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509867313] [2020-09-16 13:55:23,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:23,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:55:23,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:23,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:23,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:23,631 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:55:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:23,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:23,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:23,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600143561] [2020-09-16 13:55:23,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:23,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:23,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:23,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:23,650 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-09-16 13:55:24,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:24,427 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-09-16 13:55:24,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 13:55:24,427 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:24,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:24,428 INFO L225 Difference]: With dead ends: 238 [2020-09-16 13:55:24,428 INFO L226 Difference]: Without dead ends: 230 [2020-09-16 13:55:24,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-09-16 13:55:24,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-09-16 13:55:24,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-09-16 13:55:24,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-16 13:55:24,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-16 13:55:24,432 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-16 13:55:24,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:24,432 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-16 13:55:24,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:24,433 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-16 13:55:24,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:24,433 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:24,433 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:24,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:24,642 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:24,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:24,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1731249499, now seen corresponding path program 91 times [2020-09-16 13:55:24,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:24,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349909688] [2020-09-16 13:55:24,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:24,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349909688] [2020-09-16 13:55:24,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860561724] [2020-09-16 13:55:24,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:24,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:24,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:24,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:24,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:24,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:24,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503438693] [2020-09-16 13:55:24,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:24,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:24,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:24,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:24,959 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-16 13:55:25,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:25,260 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-09-16 13:55:25,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:55:25,261 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:25,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:25,262 INFO L225 Difference]: With dead ends: 195 [2020-09-16 13:55:25,262 INFO L226 Difference]: Without dead ends: 193 [2020-09-16 13:55:25,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:55:25,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-16 13:55:25,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-09-16 13:55:25,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-16 13:55:25,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-16 13:55:25,266 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-16 13:55:25,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:25,266 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-16 13:55:25,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:25,266 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-16 13:55:25,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:25,267 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:25,267 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:25,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-09-16 13:55:25,468 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:25,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:25,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1731912589, now seen corresponding path program 92 times [2020-09-16 13:55:25,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:25,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181666014] [2020-09-16 13:55:25,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:25,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181666014] [2020-09-16 13:55:25,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701032265] [2020-09-16 13:55:25,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:25,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:55:25,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:25,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:25,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:25,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:25,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:25,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225124293] [2020-09-16 13:55:25,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:25,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:25,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:25,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:25,793 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-16 13:55:26,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:26,395 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-09-16 13:55:26,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 13:55:26,396 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:26,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:26,397 INFO L225 Difference]: With dead ends: 206 [2020-09-16 13:55:26,397 INFO L226 Difference]: Without dead ends: 204 [2020-09-16 13:55:26,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-09-16 13:55:26,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-16 13:55:26,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-09-16 13:55:26,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-16 13:55:26,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-09-16 13:55:26,401 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-09-16 13:55:26,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:26,401 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-09-16 13:55:26,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:26,401 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-09-16 13:55:26,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:26,401 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:26,401 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:26,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:26,602 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:26,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:26,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1731934909, now seen corresponding path program 93 times [2020-09-16 13:55:26,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:26,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923206042] [2020-09-16 13:55:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:26,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923206042] [2020-09-16 13:55:26,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166526405] [2020-09-16 13:55:26,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:26,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:55:26,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:26,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:26,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:26,932 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:55:30,112 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 19 [2020-09-16 13:55:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:30,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:30,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-16 13:55:30,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847958004] [2020-09-16 13:55:30,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-16 13:55:30,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:30,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-16 13:55:30,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-09-16 13:55:30,115 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-09-16 13:55:32,605 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 25 [2020-09-16 13:55:53,404 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 29 [2020-09-16 13:56:22,129 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-09-16 13:56:45,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:45,237 INFO L93 Difference]: Finished difference Result 252 states and 593 transitions. [2020-09-16 13:56:45,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-16 13:56:45,238 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-09-16 13:56:45,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:45,239 INFO L225 Difference]: With dead ends: 252 [2020-09-16 13:56:45,239 INFO L226 Difference]: Without dead ends: 247 [2020-09-16 13:56:45,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-09-16 13:56:45,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-09-16 13:56:45,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 139. [2020-09-16 13:56:45,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-16 13:56:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-09-16 13:56:45,245 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-09-16 13:56:45,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:45,245 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-09-16 13:56:45,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-16 13:56:45,246 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-09-16 13:56:45,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:45,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:45,246 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:45,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-09-16 13:56:45,447 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:45,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:45,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1931415228, now seen corresponding path program 94 times [2020-09-16 13:56:45,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:45,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15451844] [2020-09-16 13:56:45,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:45,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15451844] [2020-09-16 13:56:45,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070307511] [2020-09-16 13:56:45,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:45,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:56:45,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:56:45,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:45,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:45,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:45,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:45,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127487] [2020-09-16 13:56:45,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:45,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:45,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:45,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:45,795 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-09-16 13:56:46,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:46,088 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-09-16 13:56:46,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:56:46,089 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:56:46,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:46,090 INFO L225 Difference]: With dead ends: 194 [2020-09-16 13:56:46,091 INFO L226 Difference]: Without dead ends: 192 [2020-09-16 13:56:46,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:56:46,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-16 13:56:46,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-09-16 13:56:46,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-16 13:56:46,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-09-16 13:56:46,095 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-09-16 13:56:46,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:46,095 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-09-16 13:56:46,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:56:46,095 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-09-16 13:56:46,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:46,095 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:46,095 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:46,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:46,297 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:46,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:46,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1931416189, now seen corresponding path program 95 times [2020-09-16 13:56:46,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:46,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292280135] [2020-09-16 13:56:46,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:46,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292280135] [2020-09-16 13:56:46,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419180215] [2020-09-16 13:56:46,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:46,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:56:46,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:56:46,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:46,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:46,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:46,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:46,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432554621] [2020-09-16 13:56:46,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:46,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:46,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:46,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:46,658 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-09-16 13:56:47,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:47,047 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-09-16 13:56:47,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:56:47,048 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:56:47,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:47,049 INFO L225 Difference]: With dead ends: 205 [2020-09-16 13:56:47,050 INFO L226 Difference]: Without dead ends: 203 [2020-09-16 13:56:47,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:56:47,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-09-16 13:56:47,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-09-16 13:56:47,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-16 13:56:47,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-09-16 13:56:47,054 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-09-16 13:56:47,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:47,054 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-09-16 13:56:47,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:56:47,054 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-09-16 13:56:47,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:47,055 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:47,055 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:47,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:47,256 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:47,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:47,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1931445019, now seen corresponding path program 96 times [2020-09-16 13:56:47,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:47,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222246543] [2020-09-16 13:56:47,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:47,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:47,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222246543] [2020-09-16 13:56:47,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477249237] [2020-09-16 13:56:47,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:47,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:56:47,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:56:47,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:47,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:47,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:47,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:47,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215310049] [2020-09-16 13:56:47,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:47,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:47,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:47,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:47,591 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-09-16 13:56:47,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:47,913 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-09-16 13:56:47,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:56:47,914 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:56:47,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:47,915 INFO L225 Difference]: With dead ends: 201 [2020-09-16 13:56:47,915 INFO L226 Difference]: Without dead ends: 199 [2020-09-16 13:56:47,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:56:47,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-16 13:56:47,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-09-16 13:56:47,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-16 13:56:47,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-09-16 13:56:47,919 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-09-16 13:56:47,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:47,919 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-09-16 13:56:47,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:56:47,919 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-09-16 13:56:47,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:47,919 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:47,919 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:48,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:48,120 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:48,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:48,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1726322578, now seen corresponding path program 97 times [2020-09-16 13:56:48,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:48,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646527454] [2020-09-16 13:56:48,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:48,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646527454] [2020-09-16 13:56:48,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287496329] [2020-09-16 13:56:48,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:48,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:48,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:48,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:48,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:48,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867391989] [2020-09-16 13:56:48,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:48,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:48,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:48,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:48,490 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-09-16 13:56:48,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:48,771 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-09-16 13:56:48,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:56:48,772 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:56:48,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:48,773 INFO L225 Difference]: With dead ends: 194 [2020-09-16 13:56:48,773 INFO L226 Difference]: Without dead ends: 192 [2020-09-16 13:56:48,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-09-16 13:56:48,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-16 13:56:48,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-09-16 13:56:48,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-16 13:56:48,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-09-16 13:56:48,778 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-09-16 13:56:48,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:48,778 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-09-16 13:56:48,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:56:48,778 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-09-16 13:56:48,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:48,778 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:48,779 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:48,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-16 13:56:48,988 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:48,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:48,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1726321617, now seen corresponding path program 98 times [2020-09-16 13:56:48,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:48,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678235203] [2020-09-16 13:56:48,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:49,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:49,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678235203] [2020-09-16 13:56:49,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751517008] [2020-09-16 13:56:49,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:49,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:56:49,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:56:49,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:49,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:49,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:49,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:49,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197150190] [2020-09-16 13:56:49,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:49,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:49,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:49,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:49,349 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-09-16 13:56:49,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:49,780 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-09-16 13:56:49,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 13:56:49,781 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:56:49,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:49,782 INFO L225 Difference]: With dead ends: 209 [2020-09-16 13:56:49,782 INFO L226 Difference]: Without dead ends: 207 [2020-09-16 13:56:49,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-09-16 13:56:49,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-16 13:56:49,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-09-16 13:56:49,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-16 13:56:49,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-09-16 13:56:49,786 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-09-16 13:56:49,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:49,787 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-09-16 13:56:49,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:56:49,787 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-09-16 13:56:49,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:49,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:49,787 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:49,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:49,988 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:49,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:49,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1726292787, now seen corresponding path program 99 times [2020-09-16 13:56:49,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:49,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557602330] [2020-09-16 13:56:49,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:50,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557602330] [2020-09-16 13:56:50,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684781687] [2020-09-16 13:56:50,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:50,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:56:50,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:56:50,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:50,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:50,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:50,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:50,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834179762] [2020-09-16 13:56:50,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:50,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:50,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:50,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:50,346 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-09-16 13:56:50,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:50,756 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-09-16 13:56:50,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 13:56:50,757 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:56:50,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:50,758 INFO L225 Difference]: With dead ends: 202 [2020-09-16 13:56:50,758 INFO L226 Difference]: Without dead ends: 200 [2020-09-16 13:56:50,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:56:50,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-16 13:56:50,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-09-16 13:56:50,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-16 13:56:50,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-16 13:56:50,761 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-16 13:56:50,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:50,761 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-16 13:56:50,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:56:50,762 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-16 13:56:50,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:50,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:50,762 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:50,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-16 13:56:50,963 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:50,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:50,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1705766788, now seen corresponding path program 100 times [2020-09-16 13:56:50,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:50,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024899575] [2020-09-16 13:56:50,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:50,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:51,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024899575] [2020-09-16 13:56:51,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270089956] [2020-09-16 13:56:51,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:51,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:56:51,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:56:51,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:51,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:51,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:51,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:51,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:51,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643339965] [2020-09-16 13:56:51,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:51,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:51,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:51,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:51,282 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-09-16 13:56:51,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:51,672 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-09-16 13:56:51,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:56:51,673 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:56:51,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:51,674 INFO L225 Difference]: With dead ends: 201 [2020-09-16 13:56:51,674 INFO L226 Difference]: Without dead ends: 199 [2020-09-16 13:56:51,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:56:51,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-16 13:56:51,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-09-16 13:56:51,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-16 13:56:51,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-09-16 13:56:51,678 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-09-16 13:56:51,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:51,678 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-09-16 13:56:51,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:56:51,679 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-09-16 13:56:51,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:51,679 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:51,679 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:51,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-16 13:56:51,880 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:51,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:51,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1705765827, now seen corresponding path program 101 times [2020-09-16 13:56:51,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:51,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934525859] [2020-09-16 13:56:51,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:51,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934525859] [2020-09-16 13:56:51,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150457263] [2020-09-16 13:56:51,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:52,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:56:52,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:56:52,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:52,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:52,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:52,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:52,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:52,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846759478] [2020-09-16 13:56:52,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:52,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:52,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:52,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:52,209 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-09-16 13:56:52,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:52,747 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-09-16 13:56:52,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-16 13:56:52,748 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:56:52,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:52,749 INFO L225 Difference]: With dead ends: 215 [2020-09-16 13:56:52,749 INFO L226 Difference]: Without dead ends: 213 [2020-09-16 13:56:52,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-16 13:56:52,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-16 13:56:52,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-09-16 13:56:52,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-16 13:56:52,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-16 13:56:52,760 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-16 13:56:52,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:52,760 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-16 13:56:52,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:56:52,760 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-16 13:56:52,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:52,761 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:52,761 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:52,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:52,972 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:52,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:52,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1705103698, now seen corresponding path program 102 times [2020-09-16 13:56:52,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:52,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034926368] [2020-09-16 13:56:52,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:53,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:53,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034926368] [2020-09-16 13:56:53,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448531980] [2020-09-16 13:56:53,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:53,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:56:53,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:56:53,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:53,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:53,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:53,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:53,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749315778] [2020-09-16 13:56:53,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:53,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:53,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:53,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:53,288 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-16 13:56:53,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:53,754 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-09-16 13:56:53,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:56:53,755 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:56:53,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:53,757 INFO L225 Difference]: With dead ends: 196 [2020-09-16 13:56:53,757 INFO L226 Difference]: Without dead ends: 194 [2020-09-16 13:56:53,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:56:53,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-16 13:56:53,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-09-16 13:56:53,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-16 13:56:53,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-16 13:56:53,760 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-16 13:56:53,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:53,761 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-16 13:56:53,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:56:53,761 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-16 13:56:53,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:53,761 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:53,761 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:53,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:53,963 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:53,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:53,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1705082339, now seen corresponding path program 103 times [2020-09-16 13:56:53,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:53,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758426557] [2020-09-16 13:56:53,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:54,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758426557] [2020-09-16 13:56:54,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008460927] [2020-09-16 13:56:54,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:54,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:54,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:54,239 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:56:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:54,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:54,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:54,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096291875] [2020-09-16 13:56:54,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:54,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:54,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:54,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:54,253 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-16 13:56:54,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:54,626 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-09-16 13:56:54,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:56:54,627 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:56:54,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:54,628 INFO L225 Difference]: With dead ends: 191 [2020-09-16 13:56:54,628 INFO L226 Difference]: Without dead ends: 186 [2020-09-16 13:56:54,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:56:54,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-16 13:56:54,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-09-16 13:56:54,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-16 13:56:54,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-16 13:56:54,631 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-16 13:56:54,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:54,631 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-16 13:56:54,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:56:54,631 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-16 13:56:54,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:54,632 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:54,632 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:54,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-16 13:56:54,833 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:54,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:54,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081378, now seen corresponding path program 104 times [2020-09-16 13:56:54,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:54,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368548578] [2020-09-16 13:56:54,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:54,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368548578] [2020-09-16 13:56:54,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398718832] [2020-09-16 13:56:54,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:54,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:56:54,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:56:54,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:54,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:55,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:56:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:55,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:55,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:55,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547976051] [2020-09-16 13:56:55,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:55,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:55,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:55,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:55,174 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-16 13:56:55,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:55,871 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-09-16 13:56:55,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 13:56:55,872 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:56:55,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:55,873 INFO L225 Difference]: With dead ends: 232 [2020-09-16 13:56:55,873 INFO L226 Difference]: Without dead ends: 227 [2020-09-16 13:56:55,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-09-16 13:56:55,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-16 13:56:55,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-09-16 13:56:55,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-16 13:56:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-16 13:56:55,877 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-16 13:56:55,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:55,877 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-16 13:56:55,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:56:55,877 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-16 13:56:55,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:55,877 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:55,878 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:56,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:56,078 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:56,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:56,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1705073907, now seen corresponding path program 105 times [2020-09-16 13:56:56,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:56,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351280859] [2020-09-16 13:56:56,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:56,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351280859] [2020-09-16 13:56:56,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284728573] [2020-09-16 13:56:56,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:56,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:56:56,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:56:56,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:56,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:56,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:56,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:56,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985997306] [2020-09-16 13:56:56,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:56,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:56,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:56,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:56,430 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-16 13:56:57,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:57,072 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-09-16 13:56:57,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 13:56:57,076 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:56:57,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:57,076 INFO L225 Difference]: With dead ends: 222 [2020-09-16 13:56:57,077 INFO L226 Difference]: Without dead ends: 220 [2020-09-16 13:56:57,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-09-16 13:56:57,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-16 13:56:57,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-09-16 13:56:57,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-16 13:56:57,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-16 13:56:57,079 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-16 13:56:57,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:57,079 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-16 13:56:57,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:56:57,079 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-16 13:56:57,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:57,080 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:57,080 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:57,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:57,281 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:57,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:57,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1705052548, now seen corresponding path program 106 times [2020-09-16 13:56:57,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:57,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632672098] [2020-09-16 13:56:57,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:57,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632672098] [2020-09-16 13:56:57,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92734105] [2020-09-16 13:56:57,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:57,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:56:57,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:56:57,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:57,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:57,600 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:56:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:57,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:57,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:57,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030832846] [2020-09-16 13:56:57,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:57,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:57,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:57,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:57,654 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-16 13:56:58,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:58,580 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-09-16 13:56:58,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 13:56:58,581 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:56:58,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:58,583 INFO L225 Difference]: With dead ends: 254 [2020-09-16 13:56:58,583 INFO L226 Difference]: Without dead ends: 246 [2020-09-16 13:56:58,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-09-16 13:56:58,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-09-16 13:56:58,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-09-16 13:56:58,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-16 13:56:58,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-09-16 13:56:58,587 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-09-16 13:56:58,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:58,588 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-09-16 13:56:58,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:56:58,588 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-09-16 13:56:58,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:58,588 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:58,588 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:58,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:58,801 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:58,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:58,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1705051587, now seen corresponding path program 107 times [2020-09-16 13:56:58,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:58,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19979345] [2020-09-16 13:56:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:58,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19979345] [2020-09-16 13:56:58,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805751620] [2020-09-16 13:56:58,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:58,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:56:58,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:56:58,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:58,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:59,108 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:56:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:59,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:59,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:59,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451113622] [2020-09-16 13:56:59,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:59,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:59,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:59,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:59,139 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-09-16 13:57:00,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:00,071 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-09-16 13:57:00,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 13:57:00,072 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:57:00,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:00,073 INFO L225 Difference]: With dead ends: 246 [2020-09-16 13:57:00,073 INFO L226 Difference]: Without dead ends: 238 [2020-09-16 13:57:00,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-09-16 13:57:00,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-09-16 13:57:00,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-09-16 13:57:00,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-16 13:57:00,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-09-16 13:57:00,078 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-09-16 13:57:00,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:00,078 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-09-16 13:57:00,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:57:00,078 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-09-16 13:57:00,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:00,079 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:00,079 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:00,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-09-16 13:57:00,288 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:00,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:00,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1704843267, now seen corresponding path program 108 times [2020-09-16 13:57:00,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:00,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25377687] [2020-09-16 13:57:00,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:00,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25377687] [2020-09-16 13:57:00,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621159989] [2020-09-16 13:57:00,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:00,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:57:00,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:00,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:57:00,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:00,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:00,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:57:00,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990462965] [2020-09-16 13:57:00,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:57:00,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:00,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:57:00,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:57:00,624 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-09-16 13:57:01,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:01,128 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-09-16 13:57:01,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 13:57:01,129 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:57:01,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:01,130 INFO L225 Difference]: With dead ends: 208 [2020-09-16 13:57:01,130 INFO L226 Difference]: Without dead ends: 206 [2020-09-16 13:57:01,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:57:01,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-16 13:57:01,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-09-16 13:57:01,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-16 13:57:01,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-09-16 13:57:01,134 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-09-16 13:57:01,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:01,134 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-09-16 13:57:01,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:57:01,134 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-09-16 13:57:01,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:01,135 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:01,135 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:01,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-16 13:57:01,336 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:01,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:01,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1704180177, now seen corresponding path program 109 times [2020-09-16 13:57:01,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:01,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749342831] [2020-09-16 13:57:01,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:01,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749342831] [2020-09-16 13:57:01,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417622247] [2020-09-16 13:57:01,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:01,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:57:01,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:01,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:01,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:01,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:57:01,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844094828] [2020-09-16 13:57:01,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:57:01,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:01,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:57:01,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:57:01,650 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-09-16 13:57:02,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:02,332 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-09-16 13:57:02,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 13:57:02,334 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:57:02,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:02,335 INFO L225 Difference]: With dead ends: 215 [2020-09-16 13:57:02,335 INFO L226 Difference]: Without dead ends: 213 [2020-09-16 13:57:02,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-09-16 13:57:02,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-16 13:57:02,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-09-16 13:57:02,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-16 13:57:02,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-16 13:57:02,339 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-16 13:57:02,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:02,339 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-16 13:57:02,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:57:02,339 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-16 13:57:02,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:02,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:02,340 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:02,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-09-16 13:57:02,540 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:02,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:02,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1704158818, now seen corresponding path program 110 times [2020-09-16 13:57:02,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:02,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170979145] [2020-09-16 13:57:02,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:02,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:02,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170979145] [2020-09-16 13:57:02,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409418891] [2020-09-16 13:57:02,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:02,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:57:02,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:02,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:57:02,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:02,842 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:57:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:02,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:02,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:57:02,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297321831] [2020-09-16 13:57:02,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:57:02,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:02,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:57:02,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:57:02,856 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-16 13:57:03,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:03,573 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-09-16 13:57:03,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 13:57:03,574 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:57:03,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:03,575 INFO L225 Difference]: With dead ends: 236 [2020-09-16 13:57:03,575 INFO L226 Difference]: Without dead ends: 228 [2020-09-16 13:57:03,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-09-16 13:57:03,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-16 13:57:03,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-09-16 13:57:03,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-16 13:57:03,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-16 13:57:03,578 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-16 13:57:03,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:03,579 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-16 13:57:03,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:57:03,579 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-16 13:57:03,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:03,579 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:03,579 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:03,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-16 13:57:03,780 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:03,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:03,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1704157857, now seen corresponding path program 111 times [2020-09-16 13:57:03,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:03,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201759244] [2020-09-16 13:57:03,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:03,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201759244] [2020-09-16 13:57:03,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600967763] [2020-09-16 13:57:03,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:03,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:57:03,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:03,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:57:03,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:04,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:57:04,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:04,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:04,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:57:04,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184100552] [2020-09-16 13:57:04,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:57:04,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:04,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:57:04,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:57:04,091 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-16 13:57:04,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:04,888 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-09-16 13:57:04,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 13:57:04,889 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:57:04,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:04,890 INFO L225 Difference]: With dead ends: 241 [2020-09-16 13:57:04,891 INFO L226 Difference]: Without dead ends: 233 [2020-09-16 13:57:04,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-09-16 13:57:04,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-16 13:57:04,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-09-16 13:57:04,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-09-16 13:57:04,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-09-16 13:57:04,894 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-09-16 13:57:04,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:04,894 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-09-16 13:57:04,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:57:04,894 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-09-16 13:57:04,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:04,895 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:04,895 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:05,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-16 13:57:05,096 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:05,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:05,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1704129027, now seen corresponding path program 112 times [2020-09-16 13:57:05,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:05,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850339140] [2020-09-16 13:57:05,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:05,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850339140] [2020-09-16 13:57:05,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803285236] [2020-09-16 13:57:05,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:05,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:57:05,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:05,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:57:05,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:05,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:57:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:05,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:05,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:57:05,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497181956] [2020-09-16 13:57:05,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:57:05,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:05,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:57:05,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:57:05,417 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-09-16 13:57:06,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:06,164 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-09-16 13:57:06,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 13:57:06,165 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:57:06,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:06,166 INFO L225 Difference]: With dead ends: 232 [2020-09-16 13:57:06,166 INFO L226 Difference]: Without dead ends: 224 [2020-09-16 13:57:06,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-09-16 13:57:06,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-16 13:57:06,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-09-16 13:57:06,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-16 13:57:06,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-09-16 13:57:06,170 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-09-16 13:57:06,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:06,170 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-09-16 13:57:06,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:57:06,170 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-09-16 13:57:06,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:06,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:06,171 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:06,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:06,372 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:06,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:06,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1141268816, now seen corresponding path program 6 times [2020-09-16 13:57:06,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:06,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270489666] [2020-09-16 13:57:06,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:06,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:06,526 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:06,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270489666] [2020-09-16 13:57:06,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134801714] [2020-09-16 13:57:06,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:06,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-16 13:57:06,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:06,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:06,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:06,767 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:57:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:06,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:06,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-16 13:57:06,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352170053] [2020-09-16 13:57:06,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-16 13:57:06,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:06,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-16 13:57:06,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-09-16 13:57:06,817 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-09-16 13:57:07,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:07,135 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-09-16 13:57:07,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 13:57:07,137 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-09-16 13:57:07,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:07,138 INFO L225 Difference]: With dead ends: 185 [2020-09-16 13:57:07,138 INFO L226 Difference]: Without dead ends: 180 [2020-09-16 13:57:07,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:57:07,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-16 13:57:07,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-09-16 13:57:07,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-16 13:57:07,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-16 13:57:07,141 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-16 13:57:07,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:07,142 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-16 13:57:07,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-16 13:57:07,142 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-16 13:57:07,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:07,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:07,142 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:07,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-09-16 13:57:07,350 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:07,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:07,351 INFO L82 PathProgramCache]: Analyzing trace with hash 33766584, now seen corresponding path program 21 times [2020-09-16 13:57:07,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:07,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429555934] [2020-09-16 13:57:07,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:07,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429555934] [2020-09-16 13:57:07,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464580061] [2020-09-16 13:57:07,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:07,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-16 13:57:07,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:07,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:07,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:07,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:07,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:07,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578110493] [2020-09-16 13:57:07,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:07,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:07,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:07,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:07,837 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-09-16 13:57:07,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:07,918 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-09-16 13:57:07,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:57:07,919 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-16 13:57:07,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:07,920 INFO L225 Difference]: With dead ends: 180 [2020-09-16 13:57:07,920 INFO L226 Difference]: Without dead ends: 177 [2020-09-16 13:57:07,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:07,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-16 13:57:07,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-09-16 13:57:07,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-16 13:57:07,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-16 13:57:07,923 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-16 13:57:07,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:07,923 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-16 13:57:07,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:07,923 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-16 13:57:07,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:07,923 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:07,923 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:08,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-16 13:57:08,125 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:08,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:08,125 INFO L82 PathProgramCache]: Analyzing trace with hash -913710200, now seen corresponding path program 22 times [2020-09-16 13:57:08,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:08,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350858915] [2020-09-16 13:57:08,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:08,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350858915] [2020-09-16 13:57:08,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083891686] [2020-09-16 13:57:08,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:08,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:57:08,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:08,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:08,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:08,604 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:08,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:08,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:08,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640190055] [2020-09-16 13:57:08,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:08,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:08,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:08,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:08,611 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-16 13:57:08,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:08,734 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-09-16 13:57:08,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:57:08,735 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-16 13:57:08,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:08,736 INFO L225 Difference]: With dead ends: 197 [2020-09-16 13:57:08,736 INFO L226 Difference]: Without dead ends: 194 [2020-09-16 13:57:08,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-09-16 13:57:08,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-16 13:57:08,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-09-16 13:57:08,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-16 13:57:08,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-16 13:57:08,740 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-16 13:57:08,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:08,740 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-16 13:57:08,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:08,740 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-16 13:57:08,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:08,741 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:08,741 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:08,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:08,942 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:08,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:08,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1775557960, now seen corresponding path program 23 times [2020-09-16 13:57:08,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:08,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907704203] [2020-09-16 13:57:08,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:09,135 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:09,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907704203] [2020-09-16 13:57:09,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436983037] [2020-09-16 13:57:09,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:09,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-16 13:57:09,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:09,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:09,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:09,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:09,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:09,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843184347] [2020-09-16 13:57:09,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:09,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:09,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:09,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:09,396 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-16 13:57:09,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:09,531 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-09-16 13:57:09,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 13:57:09,532 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-16 13:57:09,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:09,533 INFO L225 Difference]: With dead ends: 196 [2020-09-16 13:57:09,533 INFO L226 Difference]: Without dead ends: 193 [2020-09-16 13:57:09,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-16 13:57:09,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-16 13:57:09,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-09-16 13:57:09,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-09-16 13:57:09,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-09-16 13:57:09,537 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-09-16 13:57:09,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:09,537 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-09-16 13:57:09,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:09,537 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-09-16 13:57:09,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:09,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:09,537 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:09,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:09,738 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:09,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:09,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1110622840, now seen corresponding path program 24 times [2020-09-16 13:57:09,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:09,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550766745] [2020-09-16 13:57:09,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:09,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550766745] [2020-09-16 13:57:09,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783093306] [2020-09-16 13:57:09,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:09,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-16 13:57:09,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:09,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:09,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:10,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:10,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:10,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557357334] [2020-09-16 13:57:10,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:10,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:10,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:10,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:10,191 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-09-16 13:57:10,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:10,383 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-09-16 13:57:10,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:57:10,384 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-16 13:57:10,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:10,385 INFO L225 Difference]: With dead ends: 195 [2020-09-16 13:57:10,385 INFO L226 Difference]: Without dead ends: 192 [2020-09-16 13:57:10,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-09-16 13:57:10,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-16 13:57:10,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-09-16 13:57:10,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-16 13:57:10,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-09-16 13:57:10,388 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-09-16 13:57:10,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:10,388 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-09-16 13:57:10,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:10,388 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-09-16 13:57:10,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:10,388 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:10,389 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:10,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:10,590 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:10,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:10,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1089173320, now seen corresponding path program 25 times [2020-09-16 13:57:10,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:10,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919366339] [2020-09-16 13:57:10,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:10,758 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:10,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919366339] [2020-09-16 13:57:10,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771437622] [2020-09-16 13:57:10,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:10,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:10,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:11,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:11,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:11,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769169506] [2020-09-16 13:57:11,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:11,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:11,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:11,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:11,025 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-09-16 13:57:11,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:11,252 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-09-16 13:57:11,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 13:57:11,253 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-16 13:57:11,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:11,254 INFO L225 Difference]: With dead ends: 194 [2020-09-16 13:57:11,254 INFO L226 Difference]: Without dead ends: 191 [2020-09-16 13:57:11,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:57:11,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-16 13:57:11,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-09-16 13:57:11,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-16 13:57:11,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-09-16 13:57:11,259 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-09-16 13:57:11,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:11,259 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-09-16 13:57:11,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:11,259 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-09-16 13:57:11,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:11,260 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:11,260 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:11,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:11,470 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:11,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:11,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1088481400, now seen corresponding path program 26 times [2020-09-16 13:57:11,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:11,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762959503] [2020-09-16 13:57:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:11,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762959503] [2020-09-16 13:57:11,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828757991] [2020-09-16 13:57:11,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:11,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:57:11,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:11,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:11,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:11,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:11,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:11,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496222856] [2020-09-16 13:57:11,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:11,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:11,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:11,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:11,887 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-09-16 13:57:12,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:12,163 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-09-16 13:57:12,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:57:12,164 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-16 13:57:12,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:12,165 INFO L225 Difference]: With dead ends: 193 [2020-09-16 13:57:12,165 INFO L226 Difference]: Without dead ends: 190 [2020-09-16 13:57:12,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-09-16 13:57:12,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-16 13:57:12,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-09-16 13:57:12,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-16 13:57:12,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-09-16 13:57:12,169 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-09-16 13:57:12,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:12,169 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-09-16 13:57:12,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:12,169 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-09-16 13:57:12,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:12,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:12,169 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:12,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-09-16 13:57:12,370 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:12,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:12,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1088459080, now seen corresponding path program 27 times [2020-09-16 13:57:12,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:12,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228883463] [2020-09-16 13:57:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:12,498 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:12,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228883463] [2020-09-16 13:57:12,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159788130] [2020-09-16 13:57:12,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:12,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-16 13:57:12,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:12,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:12,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:12,763 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:57:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:12,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:12,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:12,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097945713] [2020-09-16 13:57:12,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:12,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:12,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:12,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:12,781 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-09-16 13:57:13,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:13,120 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-16 13:57:13,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 13:57:13,121 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-16 13:57:13,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:13,122 INFO L225 Difference]: With dead ends: 202 [2020-09-16 13:57:13,122 INFO L226 Difference]: Without dead ends: 196 [2020-09-16 13:57:13,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-09-16 13:57:13,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-16 13:57:13,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-09-16 13:57:13,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-16 13:57:13,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-09-16 13:57:13,127 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-09-16 13:57:13,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:13,127 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-09-16 13:57:13,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:13,127 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-09-16 13:57:13,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:13,128 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:13,128 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:13,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-16 13:57:13,338 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:13,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:13,339 INFO L82 PathProgramCache]: Analyzing trace with hash -195697579, now seen corresponding path program 113 times [2020-09-16 13:57:13,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:13,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027690706] [2020-09-16 13:57:13,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:13,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027690706] [2020-09-16 13:57:13,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956226524] [2020-09-16 13:57:13,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:13,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:57:13,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:13,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:13,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:13,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:13,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:13,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688220360] [2020-09-16 13:57:13,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:13,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:13,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:13,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:13,796 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-09-16 13:57:13,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:13,877 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-09-16 13:57:13,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:57:13,879 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:13,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:13,880 INFO L225 Difference]: With dead ends: 188 [2020-09-16 13:57:13,880 INFO L226 Difference]: Without dead ends: 186 [2020-09-16 13:57:13,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:13,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-16 13:57:13,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-09-16 13:57:13,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-16 13:57:13,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-09-16 13:57:13,884 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-09-16 13:57:13,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:13,885 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-09-16 13:57:13,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:13,885 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-09-16 13:57:13,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:13,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:13,885 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:14,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-16 13:57:14,096 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:14,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:14,097 INFO L82 PathProgramCache]: Analyzing trace with hash -195696618, now seen corresponding path program 114 times [2020-09-16 13:57:14,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:14,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212457979] [2020-09-16 13:57:14,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:14,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212457979] [2020-09-16 13:57:14,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879303393] [2020-09-16 13:57:14,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:14,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:57:14,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:14,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:14,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:14,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:14,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:14,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:14,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250008282] [2020-09-16 13:57:14,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:14,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:14,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:14,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:14,554 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-09-16 13:57:14,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:14,850 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-09-16 13:57:14,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:57:14,851 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:14,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:14,852 INFO L225 Difference]: With dead ends: 199 [2020-09-16 13:57:14,852 INFO L226 Difference]: Without dead ends: 197 [2020-09-16 13:57:14,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-09-16 13:57:14,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-16 13:57:14,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-09-16 13:57:14,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-16 13:57:14,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-16 13:57:14,855 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-16 13:57:14,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:14,855 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-16 13:57:14,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:14,855 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-16 13:57:14,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:14,856 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:14,856 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:15,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-16 13:57:15,057 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:15,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:15,057 INFO L82 PathProgramCache]: Analyzing trace with hash -195667788, now seen corresponding path program 115 times [2020-09-16 13:57:15,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:15,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268946892] [2020-09-16 13:57:15,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:15,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:15,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268946892] [2020-09-16 13:57:15,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10111966] [2020-09-16 13:57:15,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:15,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:15,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:15,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:15,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:15,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757880366] [2020-09-16 13:57:15,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:15,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:15,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:15,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:15,552 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-16 13:57:15,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:15,922 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-16 13:57:15,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 13:57:15,923 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:15,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:15,924 INFO L225 Difference]: With dead ends: 210 [2020-09-16 13:57:15,924 INFO L226 Difference]: Without dead ends: 208 [2020-09-16 13:57:15,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:57:15,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-16 13:57:15,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-09-16 13:57:15,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-16 13:57:15,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-09-16 13:57:15,927 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-09-16 13:57:15,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:15,927 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-09-16 13:57:15,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:15,927 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-09-16 13:57:15,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:15,928 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:15,928 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:16,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-16 13:57:16,129 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:16,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:16,129 INFO L82 PathProgramCache]: Analyzing trace with hash -194774058, now seen corresponding path program 116 times [2020-09-16 13:57:16,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:16,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585754967] [2020-09-16 13:57:16,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:16,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585754967] [2020-09-16 13:57:16,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710652629] [2020-09-16 13:57:16,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:16,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:57:16,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:16,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:16,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:16,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:16,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:16,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440240091] [2020-09-16 13:57:16,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:16,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:16,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:16,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:16,643 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-09-16 13:57:17,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:17,059 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-16 13:57:17,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:57:17,060 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:17,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:17,061 INFO L225 Difference]: With dead ends: 210 [2020-09-16 13:57:17,061 INFO L226 Difference]: Without dead ends: 208 [2020-09-16 13:57:17,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-09-16 13:57:17,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-16 13:57:17,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-09-16 13:57:17,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-16 13:57:17,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-16 13:57:17,065 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-16 13:57:17,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:17,065 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-16 13:57:17,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:17,065 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-16 13:57:17,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:17,066 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:17,066 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:17,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-09-16 13:57:17,275 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:17,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:17,275 INFO L82 PathProgramCache]: Analyzing trace with hash -194773097, now seen corresponding path program 117 times [2020-09-16 13:57:17,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:17,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929705471] [2020-09-16 13:57:17,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:17,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:17,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929705471] [2020-09-16 13:57:17,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323617394] [2020-09-16 13:57:17,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:17,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:57:17,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:17,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:17,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:21,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:21,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:21,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:21,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691871383] [2020-09-16 13:57:21,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:21,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:21,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:21,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-09-16 13:57:21,312 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-16 13:57:25,563 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-16 13:57:25,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:25,896 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-16 13:57:25,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 13:57:25,897 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:25,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:25,901 INFO L225 Difference]: With dead ends: 218 [2020-09-16 13:57:25,901 INFO L226 Difference]: Without dead ends: 216 [2020-09-16 13:57:25,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-09-16 13:57:25,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-16 13:57:25,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-16 13:57:25,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-16 13:57:25,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-16 13:57:25,904 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-16 13:57:25,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:25,904 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-16 13:57:25,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:25,904 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-16 13:57:25,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:25,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:25,904 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:26,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:26,105 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:26,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:26,106 INFO L82 PathProgramCache]: Analyzing trace with hash -194744267, now seen corresponding path program 118 times [2020-09-16 13:57:26,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:26,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539070514] [2020-09-16 13:57:26,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:26,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539070514] [2020-09-16 13:57:26,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809020451] [2020-09-16 13:57:26,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:26,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:57:26,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:26,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:26,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:26,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:26,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:26,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915200158] [2020-09-16 13:57:26,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:26,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:26,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:26,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:26,609 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-16 13:57:27,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:27,061 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-09-16 13:57:27,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 13:57:27,062 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:27,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:27,063 INFO L225 Difference]: With dead ends: 212 [2020-09-16 13:57:27,063 INFO L226 Difference]: Without dead ends: 210 [2020-09-16 13:57:27,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-09-16 13:57:27,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-16 13:57:27,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-09-16 13:57:27,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-16 13:57:27,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-09-16 13:57:27,066 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-09-16 13:57:27,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:27,066 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-09-16 13:57:27,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:27,066 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-09-16 13:57:27,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:27,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:27,067 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:27,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:27,268 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:27,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:27,268 INFO L82 PathProgramCache]: Analyzing trace with hash -167068428, now seen corresponding path program 119 times [2020-09-16 13:57:27,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:27,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615145871] [2020-09-16 13:57:27,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:27,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615145871] [2020-09-16 13:57:27,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005527222] [2020-09-16 13:57:27,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:27,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:57:27,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:27,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:27,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:27,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:27,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:27,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303111810] [2020-09-16 13:57:27,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:27,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:27,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:27,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:27,707 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-09-16 13:57:28,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:28,139 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-16 13:57:28,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:57:28,140 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:28,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:28,141 INFO L225 Difference]: With dead ends: 212 [2020-09-16 13:57:28,141 INFO L226 Difference]: Without dead ends: 210 [2020-09-16 13:57:28,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-09-16 13:57:28,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-16 13:57:28,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-09-16 13:57:28,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-16 13:57:28,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-16 13:57:28,144 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-16 13:57:28,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:28,144 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-16 13:57:28,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:28,144 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-16 13:57:28,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:28,145 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:28,145 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:28,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:28,346 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:28,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:28,346 INFO L82 PathProgramCache]: Analyzing trace with hash -167067467, now seen corresponding path program 120 times [2020-09-16 13:57:28,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:28,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580104877] [2020-09-16 13:57:28,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:28,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580104877] [2020-09-16 13:57:28,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271239186] [2020-09-16 13:57:28,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:28,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:57:28,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:28,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:28,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:28,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:28,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:28,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:28,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593422899] [2020-09-16 13:57:28,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:28,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:28,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:28,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:28,788 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-16 13:57:29,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:29,260 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-09-16 13:57:29,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:57:29,262 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:29,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:29,262 INFO L225 Difference]: With dead ends: 224 [2020-09-16 13:57:29,263 INFO L226 Difference]: Without dead ends: 222 [2020-09-16 13:57:29,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-09-16 13:57:29,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-16 13:57:29,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-09-16 13:57:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-16 13:57:29,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-16 13:57:29,266 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-16 13:57:29,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:29,266 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-16 13:57:29,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:29,267 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-16 13:57:29,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:29,267 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:29,267 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:29,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:29,471 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:29,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:29,471 INFO L82 PathProgramCache]: Analyzing trace with hash -167038637, now seen corresponding path program 121 times [2020-09-16 13:57:29,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:29,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808453954] [2020-09-16 13:57:29,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:29,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808453954] [2020-09-16 13:57:29,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771056756] [2020-09-16 13:57:29,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:29,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:29,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:29,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:29,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:29,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670679274] [2020-09-16 13:57:29,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:29,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:29,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:29,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:29,913 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-16 13:57:30,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:30,318 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-09-16 13:57:30,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:57:30,319 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:30,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:30,320 INFO L225 Difference]: With dead ends: 218 [2020-09-16 13:57:30,320 INFO L226 Difference]: Without dead ends: 216 [2020-09-16 13:57:30,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:57:30,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-16 13:57:30,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-16 13:57:30,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-16 13:57:30,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-16 13:57:30,323 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-16 13:57:30,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:30,323 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-16 13:57:30,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:30,323 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-16 13:57:30,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:30,324 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:30,324 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:30,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:30,525 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:30,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:30,525 INFO L82 PathProgramCache]: Analyzing trace with hash -166114155, now seen corresponding path program 122 times [2020-09-16 13:57:30,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:30,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972928766] [2020-09-16 13:57:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:30,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972928766] [2020-09-16 13:57:30,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948833540] [2020-09-16 13:57:30,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:30,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:57:30,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:30,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:30,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:30,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:30,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:30,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490537379] [2020-09-16 13:57:30,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:30,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:30,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:30,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:30,980 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-16 13:57:31,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:31,329 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-09-16 13:57:31,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:57:31,330 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:31,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:31,331 INFO L225 Difference]: With dead ends: 206 [2020-09-16 13:57:31,331 INFO L226 Difference]: Without dead ends: 204 [2020-09-16 13:57:31,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-09-16 13:57:31,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-16 13:57:31,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-09-16 13:57:31,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-16 13:57:31,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-09-16 13:57:31,334 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-09-16 13:57:31,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:31,335 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-09-16 13:57:31,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:31,335 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-09-16 13:57:31,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:31,335 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:31,335 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:31,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-16 13:57:31,536 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:31,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:31,537 INFO L82 PathProgramCache]: Analyzing trace with hash 691806102, now seen corresponding path program 123 times [2020-09-16 13:57:31,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:31,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144914391] [2020-09-16 13:57:31,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:31,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144914391] [2020-09-16 13:57:31,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960416233] [2020-09-16 13:57:31,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:31,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-16 13:57:31,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:31,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:31,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:31,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:31,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:31,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366187949] [2020-09-16 13:57:31,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:31,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:31,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:31,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:31,966 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-09-16 13:57:32,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:32,315 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-09-16 13:57:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:57:32,317 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:32,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:32,318 INFO L225 Difference]: With dead ends: 207 [2020-09-16 13:57:32,318 INFO L226 Difference]: Without dead ends: 205 [2020-09-16 13:57:32,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-09-16 13:57:32,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-09-16 13:57:32,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-09-16 13:57:32,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-16 13:57:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-09-16 13:57:32,329 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-09-16 13:57:32,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:32,329 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-09-16 13:57:32,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:32,329 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-09-16 13:57:32,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:32,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:32,330 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:32,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-16 13:57:32,541 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:32,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:32,542 INFO L82 PathProgramCache]: Analyzing trace with hash 691807063, now seen corresponding path program 124 times [2020-09-16 13:57:32,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:32,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957081365] [2020-09-16 13:57:32,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:32,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957081365] [2020-09-16 13:57:32,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90667304] [2020-09-16 13:57:32,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:32,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:57:32,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:32,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:32,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:32,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:32,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:32,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:32,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553525861] [2020-09-16 13:57:32,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:32,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:32,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:32,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:32,994 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-09-16 13:57:33,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:33,373 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-09-16 13:57:33,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 13:57:33,374 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:33,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:33,375 INFO L225 Difference]: With dead ends: 217 [2020-09-16 13:57:33,375 INFO L226 Difference]: Without dead ends: 215 [2020-09-16 13:57:33,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-09-16 13:57:33,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-16 13:57:33,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-09-16 13:57:33,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-16 13:57:33,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-09-16 13:57:33,378 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-09-16 13:57:33,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:33,378 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-09-16 13:57:33,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:33,378 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-09-16 13:57:33,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:33,379 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:33,379 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:33,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-16 13:57:33,580 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:33,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:33,580 INFO L82 PathProgramCache]: Analyzing trace with hash 691835893, now seen corresponding path program 125 times [2020-09-16 13:57:33,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:33,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131406187] [2020-09-16 13:57:33,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:33,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131406187] [2020-09-16 13:57:33,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879156196] [2020-09-16 13:57:33,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:33,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:57:33,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:33,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:33,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:35,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:35,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:35,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031003031] [2020-09-16 13:57:35,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:35,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:35,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:35,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:35,371 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-09-16 13:57:35,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:35,887 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-09-16 13:57:35,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:57:35,888 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:35,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:35,889 INFO L225 Difference]: With dead ends: 223 [2020-09-16 13:57:35,889 INFO L226 Difference]: Without dead ends: 221 [2020-09-16 13:57:35,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:57:35,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-16 13:57:35,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-09-16 13:57:35,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-16 13:57:35,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-09-16 13:57:35,893 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-09-16 13:57:35,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:35,893 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-09-16 13:57:35,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:35,894 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-09-16 13:57:35,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:35,894 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:35,894 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:36,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-16 13:57:36,098 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:36,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:36,099 INFO L82 PathProgramCache]: Analyzing trace with hash 692730584, now seen corresponding path program 126 times [2020-09-16 13:57:36,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:36,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603416028] [2020-09-16 13:57:36,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:36,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603416028] [2020-09-16 13:57:36,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110112] [2020-09-16 13:57:36,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:36,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:57:36,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:36,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:36,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:36,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:36,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:36,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:36,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225223176] [2020-09-16 13:57:36,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:36,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:36,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:36,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:36,537 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-09-16 13:57:36,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:36,941 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-09-16 13:57:36,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:57:36,942 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:36,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:36,943 INFO L225 Difference]: With dead ends: 225 [2020-09-16 13:57:36,943 INFO L226 Difference]: Without dead ends: 223 [2020-09-16 13:57:36,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:57:36,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-16 13:57:36,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-09-16 13:57:36,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-16 13:57:36,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-09-16 13:57:36,947 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-09-16 13:57:36,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:36,947 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-09-16 13:57:36,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:36,947 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-09-16 13:57:36,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:36,948 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:36,948 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:37,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:37,149 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:37,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:37,149 INFO L82 PathProgramCache]: Analyzing trace with hash 720435253, now seen corresponding path program 127 times [2020-09-16 13:57:37,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:37,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390749624] [2020-09-16 13:57:37,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:37,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390749624] [2020-09-16 13:57:37,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019038911] [2020-09-16 13:57:37,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:37,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:37,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:37,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:37,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:37,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079662386] [2020-09-16 13:57:37,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:37,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:37,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:37,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:37,613 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-09-16 13:57:38,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:38,019 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-09-16 13:57:38,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:57:38,020 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:38,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:38,021 INFO L225 Difference]: With dead ends: 214 [2020-09-16 13:57:38,021 INFO L226 Difference]: Without dead ends: 212 [2020-09-16 13:57:38,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-09-16 13:57:38,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-16 13:57:38,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-09-16 13:57:38,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-16 13:57:38,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-09-16 13:57:38,030 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-09-16 13:57:38,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:38,030 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-09-16 13:57:38,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:38,030 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-09-16 13:57:38,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:38,030 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:38,031 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:38,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:38,231 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:38,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:38,232 INFO L82 PathProgramCache]: Analyzing trace with hash 721388565, now seen corresponding path program 128 times [2020-09-16 13:57:38,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:38,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788245088] [2020-09-16 13:57:38,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:38,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788245088] [2020-09-16 13:57:38,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667051371] [2020-09-16 13:57:38,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:38,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:57:38,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:38,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:38,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:38,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:38,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:38,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:38,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030299732] [2020-09-16 13:57:38,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:38,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:38,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:38,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:38,721 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-09-16 13:57:39,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:39,006 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-09-16 13:57:39,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:57:39,007 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:39,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:39,008 INFO L225 Difference]: With dead ends: 203 [2020-09-16 13:57:39,008 INFO L226 Difference]: Without dead ends: 201 [2020-09-16 13:57:39,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-09-16 13:57:39,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-16 13:57:39,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-09-16 13:57:39,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-16 13:57:39,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-09-16 13:57:39,012 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-09-16 13:57:39,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:39,012 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-09-16 13:57:39,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:39,013 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-09-16 13:57:39,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:39,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:39,013 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:39,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-09-16 13:57:39,214 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:39,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:39,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1998481017, now seen corresponding path program 129 times [2020-09-16 13:57:39,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:39,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168141495] [2020-09-16 13:57:39,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:39,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:39,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168141495] [2020-09-16 13:57:39,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770946136] [2020-09-16 13:57:39,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:39,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:57:39,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:39,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:39,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:39,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:39,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:39,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866155723] [2020-09-16 13:57:39,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:39,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:39,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:39,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:39,779 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-09-16 13:57:39,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:39,891 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-16 13:57:39,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:57:39,892 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:39,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:39,892 INFO L225 Difference]: With dead ends: 212 [2020-09-16 13:57:39,893 INFO L226 Difference]: Without dead ends: 210 [2020-09-16 13:57:39,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-09-16 13:57:39,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-16 13:57:39,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-09-16 13:57:39,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 13:57:39,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-09-16 13:57:39,896 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-09-16 13:57:39,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:39,896 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-09-16 13:57:39,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:39,896 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-09-16 13:57:39,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:39,897 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:39,897 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:40,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:40,098 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:40,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:40,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1998480056, now seen corresponding path program 130 times [2020-09-16 13:57:40,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:40,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392012932] [2020-09-16 13:57:40,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:40,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392012932] [2020-09-16 13:57:40,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828798770] [2020-09-16 13:57:40,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:40,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:57:40,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:40,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:40,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:40,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:40,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:40,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025531703] [2020-09-16 13:57:40,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:40,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:40,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:40,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:40,631 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-09-16 13:57:40,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:40,966 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-09-16 13:57:40,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:57:40,967 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:40,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:40,968 INFO L225 Difference]: With dead ends: 217 [2020-09-16 13:57:40,968 INFO L226 Difference]: Without dead ends: 215 [2020-09-16 13:57:40,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:57:40,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-16 13:57:40,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-09-16 13:57:40,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 13:57:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-16 13:57:40,972 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-16 13:57:40,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:40,972 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-16 13:57:40,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:40,972 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-16 13:57:40,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:40,973 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:40,973 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:41,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:41,174 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:41,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:41,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1998451226, now seen corresponding path program 131 times [2020-09-16 13:57:41,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:41,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597169224] [2020-09-16 13:57:41,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:41,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597169224] [2020-09-16 13:57:41,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479148701] [2020-09-16 13:57:41,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:41,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:57:41,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:41,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:41,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:41,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:41,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:41,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175212412] [2020-09-16 13:57:41,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:41,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:41,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:41,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:41,715 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-16 13:57:42,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:42,115 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-09-16 13:57:42,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:57:42,116 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:42,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:42,117 INFO L225 Difference]: With dead ends: 227 [2020-09-16 13:57:42,117 INFO L226 Difference]: Without dead ends: 225 [2020-09-16 13:57:42,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-16 13:57:42,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-16 13:57:42,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-09-16 13:57:42,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-16 13:57:42,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-09-16 13:57:42,128 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-09-16 13:57:42,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:42,128 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-09-16 13:57:42,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:42,128 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-09-16 13:57:42,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:42,129 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:42,129 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:42,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:42,330 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:42,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:42,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1997557496, now seen corresponding path program 132 times [2020-09-16 13:57:42,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:42,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491182907] [2020-09-16 13:57:42,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:42,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491182907] [2020-09-16 13:57:42,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225616618] [2020-09-16 13:57:42,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:42,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:57:42,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:42,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:42,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:42,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:42,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:42,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:42,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066731033] [2020-09-16 13:57:42,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:42,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:42,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:42,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:42,865 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-09-16 13:57:43,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:43,392 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-09-16 13:57:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 13:57:43,393 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:43,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:43,393 INFO L225 Difference]: With dead ends: 227 [2020-09-16 13:57:43,394 INFO L226 Difference]: Without dead ends: 225 [2020-09-16 13:57:43,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-09-16 13:57:43,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-16 13:57:43,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-09-16 13:57:43,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 13:57:43,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-16 13:57:43,397 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-16 13:57:43,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:43,397 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-16 13:57:43,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:43,397 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-16 13:57:43,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:43,398 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:43,398 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:43,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-09-16 13:57:43,604 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:43,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:43,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1997556535, now seen corresponding path program 133 times [2020-09-16 13:57:43,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:43,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947238319] [2020-09-16 13:57:43,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:43,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:43,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947238319] [2020-09-16 13:57:43,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992347720] [2020-09-16 13:57:43,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:43,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:43,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:47,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:47,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:47,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118473617] [2020-09-16 13:57:47,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:47,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:47,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:47,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-09-16 13:57:47,376 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-16 13:57:51,658 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-16 13:57:52,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:52,078 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-09-16 13:57:52,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 13:57:52,079 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:52,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:52,080 INFO L225 Difference]: With dead ends: 237 [2020-09-16 13:57:52,080 INFO L226 Difference]: Without dead ends: 235 [2020-09-16 13:57:52,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-09-16 13:57:52,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-09-16 13:57:52,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-09-16 13:57:52,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 13:57:52,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-16 13:57:52,083 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-16 13:57:52,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:52,083 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-16 13:57:52,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:52,088 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-16 13:57:52,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:52,089 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:52,089 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:52,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-16 13:57:52,292 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:52,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:52,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1997527705, now seen corresponding path program 134 times [2020-09-16 13:57:52,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:52,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843515697] [2020-09-16 13:57:52,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:52,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843515697] [2020-09-16 13:57:52,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785060286] [2020-09-16 13:57:52,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:52,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:57:52,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:52,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:52,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:52,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:52,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:52,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586350417] [2020-09-16 13:57:52,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:52,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:52,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:52,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:52,828 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-16 13:57:53,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:53,414 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-09-16 13:57:53,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 13:57:53,415 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:53,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:53,416 INFO L225 Difference]: With dead ends: 229 [2020-09-16 13:57:53,416 INFO L226 Difference]: Without dead ends: 227 [2020-09-16 13:57:53,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-09-16 13:57:53,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-16 13:57:53,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-09-16 13:57:53,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-16 13:57:53,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-09-16 13:57:53,426 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-09-16 13:57:53,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:53,426 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-09-16 13:57:53,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:53,426 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-09-16 13:57:53,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:53,426 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:53,427 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:53,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-09-16 13:57:53,628 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:53,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:53,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1969851866, now seen corresponding path program 135 times [2020-09-16 13:57:53,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:53,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469458021] [2020-09-16 13:57:53,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:53,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469458021] [2020-09-16 13:57:53,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274052582] [2020-09-16 13:57:53,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:53,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:57:53,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:53,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:53,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:54,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:54,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:54,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132389984] [2020-09-16 13:57:54,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:54,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:54,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:54,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:54,081 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-09-16 13:57:54,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:54,661 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-09-16 13:57:54,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:57:54,662 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:54,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:54,663 INFO L225 Difference]: With dead ends: 225 [2020-09-16 13:57:54,663 INFO L226 Difference]: Without dead ends: 223 [2020-09-16 13:57:54,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-09-16 13:57:54,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-16 13:57:54,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-09-16 13:57:54,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 13:57:54,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-16 13:57:54,666 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-16 13:57:54,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:54,667 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-16 13:57:54,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:54,667 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-16 13:57:54,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:54,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:54,667 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:54,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-16 13:57:54,868 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:54,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:54,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1969850905, now seen corresponding path program 136 times [2020-09-16 13:57:54,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:54,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947246157] [2020-09-16 13:57:54,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:55,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947246157] [2020-09-16 13:57:55,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957209801] [2020-09-16 13:57:55,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:55,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:57:55,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:55,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:55,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:55,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:55,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:55,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076702693] [2020-09-16 13:57:55,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:55,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:55,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:55,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:55,376 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-16 13:57:56,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:56,070 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2020-09-16 13:57:56,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 13:57:56,071 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:56,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:56,072 INFO L225 Difference]: With dead ends: 239 [2020-09-16 13:57:56,072 INFO L226 Difference]: Without dead ends: 237 [2020-09-16 13:57:56,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-09-16 13:57:56,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-16 13:57:56,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-09-16 13:57:56,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 13:57:56,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-16 13:57:56,075 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-16 13:57:56,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:56,075 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-16 13:57:56,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:56,075 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-16 13:57:56,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:56,076 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:56,076 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:56,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-16 13:57:56,277 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:56,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:56,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1969822075, now seen corresponding path program 137 times [2020-09-16 13:57:56,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:56,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715194925] [2020-09-16 13:57:56,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:56,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715194925] [2020-09-16 13:57:56,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923660600] [2020-09-16 13:57:56,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:56,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:57:56,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:56,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:56,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:56,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:56,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:56,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866633560] [2020-09-16 13:57:56,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:56,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:56,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:56,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:56,725 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-16 13:57:57,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:57,227 INFO L93 Difference]: Finished difference Result 234 states and 550 transitions. [2020-09-16 13:57:57,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:57:57,228 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:57,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:57,229 INFO L225 Difference]: With dead ends: 234 [2020-09-16 13:57:57,229 INFO L226 Difference]: Without dead ends: 232 [2020-09-16 13:57:57,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:57:57,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-16 13:57:57,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-09-16 13:57:57,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 13:57:57,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-16 13:57:57,232 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-16 13:57:57,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:57,233 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-16 13:57:57,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:57,233 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-16 13:57:57,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:57,233 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:57,233 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:57,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-09-16 13:57:57,435 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:57,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:57,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1968897593, now seen corresponding path program 138 times [2020-09-16 13:57:57,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:57,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837759512] [2020-09-16 13:57:57,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:57,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837759512] [2020-09-16 13:57:57,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091685506] [2020-09-16 13:57:57,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:57,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:57:57,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:57,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:57,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:57,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:57,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:57,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547600211] [2020-09-16 13:57:57,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:57,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:57,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:57,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:57,863 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-16 13:57:58,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:58,302 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-09-16 13:57:58,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 13:57:58,303 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:58,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:58,304 INFO L225 Difference]: With dead ends: 218 [2020-09-16 13:57:58,304 INFO L226 Difference]: Without dead ends: 216 [2020-09-16 13:57:58,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:57:58,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-16 13:57:58,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-09-16 13:57:58,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-16 13:57:58,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-09-16 13:57:58,308 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-09-16 13:57:58,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:58,308 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-09-16 13:57:58,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:58,308 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-09-16 13:57:58,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:58,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:58,308 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:58,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:58,509 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:58,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:58,510 INFO L82 PathProgramCache]: Analyzing trace with hash 575763989, now seen corresponding path program 139 times [2020-09-16 13:57:58,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:58,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287950501] [2020-09-16 13:57:58,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:58,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287950501] [2020-09-16 13:57:58,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916940086] [2020-09-16 13:57:58,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:58,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:58,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:59,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:59,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:59,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787647228] [2020-09-16 13:57:59,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:59,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:59,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:59,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:59,054 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-09-16 13:57:59,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:59,187 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-09-16 13:57:59,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 13:57:59,188 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:59,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:59,189 INFO L225 Difference]: With dead ends: 208 [2020-09-16 13:57:59,189 INFO L226 Difference]: Without dead ends: 206 [2020-09-16 13:57:59,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-16 13:57:59,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-16 13:57:59,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-09-16 13:57:59,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-16 13:57:59,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-09-16 13:57:59,193 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-09-16 13:57:59,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:59,194 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-09-16 13:57:59,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:59,194 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-09-16 13:57:59,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:59,195 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:59,195 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:59,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:59,403 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:59,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:59,404 INFO L82 PathProgramCache]: Analyzing trace with hash 575764950, now seen corresponding path program 140 times [2020-09-16 13:57:59,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:59,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917658937] [2020-09-16 13:57:59,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:59,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917658937] [2020-09-16 13:57:59,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76778298] [2020-09-16 13:57:59,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:59,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:57:59,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:59,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:59,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:59,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:59,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:59,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009937424] [2020-09-16 13:57:59,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:59,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:59,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:59,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:59,879 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-09-16 13:58:00,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:00,272 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-09-16 13:58:00,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 13:58:00,273 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:00,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:00,274 INFO L225 Difference]: With dead ends: 229 [2020-09-16 13:58:00,274 INFO L226 Difference]: Without dead ends: 227 [2020-09-16 13:58:00,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-09-16 13:58:00,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-16 13:58:00,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-09-16 13:58:00,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 13:58:00,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-09-16 13:58:00,279 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-09-16 13:58:00,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:00,279 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-09-16 13:58:00,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:00,279 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-09-16 13:58:00,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:00,280 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:00,280 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:00,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:00,485 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:00,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:00,485 INFO L82 PathProgramCache]: Analyzing trace with hash 575793780, now seen corresponding path program 141 times [2020-09-16 13:58:00,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:00,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185558077] [2020-09-16 13:58:00,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:00,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185558077] [2020-09-16 13:58:00,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628383787] [2020-09-16 13:58:00,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:00,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:58:00,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:00,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:00,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:01,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:01,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:01,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506712380] [2020-09-16 13:58:01,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:01,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:01,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:01,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:01,007 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-09-16 13:58:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:01,490 INFO L93 Difference]: Finished difference Result 235 states and 548 transitions. [2020-09-16 13:58:01,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 13:58:01,491 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:01,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:01,492 INFO L225 Difference]: With dead ends: 235 [2020-09-16 13:58:01,492 INFO L226 Difference]: Without dead ends: 233 [2020-09-16 13:58:01,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:58:01,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-16 13:58:01,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2020-09-16 13:58:01,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-16 13:58:01,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-09-16 13:58:01,496 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-09-16 13:58:01,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:01,496 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-09-16 13:58:01,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:01,496 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-09-16 13:58:01,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:01,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:01,496 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:01,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:01,697 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:01,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:01,698 INFO L82 PathProgramCache]: Analyzing trace with hash 576687510, now seen corresponding path program 142 times [2020-09-16 13:58:01,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:01,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694177428] [2020-09-16 13:58:01,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:01,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694177428] [2020-09-16 13:58:01,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545909858] [2020-09-16 13:58:01,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:01,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:58:01,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:01,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:01,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:02,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:02,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:02,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129065536] [2020-09-16 13:58:02,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:02,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:02,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:02,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:02,184 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-09-16 13:58:02,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:02,761 INFO L93 Difference]: Finished difference Result 233 states and 544 transitions. [2020-09-16 13:58:02,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 13:58:02,762 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:02,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:02,763 INFO L225 Difference]: With dead ends: 233 [2020-09-16 13:58:02,763 INFO L226 Difference]: Without dead ends: 231 [2020-09-16 13:58:02,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:58:02,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-16 13:58:02,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-09-16 13:58:02,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 13:58:02,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-09-16 13:58:02,767 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-09-16 13:58:02,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:02,768 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-09-16 13:58:02,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:02,768 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-09-16 13:58:02,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:02,768 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:02,768 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:02,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:02,977 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:02,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:02,978 INFO L82 PathProgramCache]: Analyzing trace with hash 576688471, now seen corresponding path program 143 times [2020-09-16 13:58:02,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:02,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009299044] [2020-09-16 13:58:02,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:03,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009299044] [2020-09-16 13:58:03,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462653902] [2020-09-16 13:58:03,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:03,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:58:03,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:03,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:03,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:07,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:07,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:07,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866527549] [2020-09-16 13:58:07,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:07,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:07,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:07,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-09-16 13:58:07,192 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-09-16 13:58:11,529 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-16 13:58:11,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:11,960 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-09-16 13:58:11,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:58:11,961 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:11,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:11,962 INFO L225 Difference]: With dead ends: 241 [2020-09-16 13:58:11,962 INFO L226 Difference]: Without dead ends: 239 [2020-09-16 13:58:11,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-09-16 13:58:11,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-16 13:58:11,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-09-16 13:58:11,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 13:58:11,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-09-16 13:58:11,966 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-09-16 13:58:11,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:11,966 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-09-16 13:58:11,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:11,967 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-09-16 13:58:11,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:11,967 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:11,967 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:12,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:12,168 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:12,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:12,169 INFO L82 PathProgramCache]: Analyzing trace with hash 576717301, now seen corresponding path program 144 times [2020-09-16 13:58:12,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:12,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917784048] [2020-09-16 13:58:12,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:12,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917784048] [2020-09-16 13:58:12,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762973967] [2020-09-16 13:58:12,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:12,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:58:12,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:12,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:12,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:12,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:12,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:12,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097703776] [2020-09-16 13:58:12,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:12,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:12,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:12,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:12,736 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-09-16 13:58:13,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:13,348 INFO L93 Difference]: Finished difference Result 233 states and 548 transitions. [2020-09-16 13:58:13,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:58:13,350 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:13,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:13,351 INFO L225 Difference]: With dead ends: 233 [2020-09-16 13:58:13,351 INFO L226 Difference]: Without dead ends: 231 [2020-09-16 13:58:13,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:58:13,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-16 13:58:13,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2020-09-16 13:58:13,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-16 13:58:13,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-09-16 13:58:13,354 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-09-16 13:58:13,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:13,354 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-09-16 13:58:13,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:13,354 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-09-16 13:58:13,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:13,355 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:13,355 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:13,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-09-16 13:58:13,556 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:13,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:13,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1212993479, now seen corresponding path program 145 times [2020-09-16 13:58:13,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:13,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525514110] [2020-09-16 13:58:13,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:13,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525514110] [2020-09-16 13:58:13,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217698681] [2020-09-16 13:58:13,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:13,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:13,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:14,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:14,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:14,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135004474] [2020-09-16 13:58:14,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:14,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:14,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:14,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:14,057 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-09-16 13:58:14,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:14,274 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-09-16 13:58:14,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:58:14,276 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:14,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:14,276 INFO L225 Difference]: With dead ends: 204 [2020-09-16 13:58:14,277 INFO L226 Difference]: Without dead ends: 202 [2020-09-16 13:58:14,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-09-16 13:58:14,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-16 13:58:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-09-16 13:58:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 13:58:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-09-16 13:58:14,280 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-09-16 13:58:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:14,280 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-09-16 13:58:14,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:14,280 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-09-16 13:58:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:14,281 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:14,281 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:14,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:14,482 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:14,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:14,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1212994440, now seen corresponding path program 146 times [2020-09-16 13:58:14,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:14,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478922717] [2020-09-16 13:58:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:14,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478922717] [2020-09-16 13:58:14,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167851304] [2020-09-16 13:58:14,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:14,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:58:14,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:14,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:14,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:14,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:14,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:14,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991876717] [2020-09-16 13:58:14,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:14,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:14,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:14,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:14,956 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-09-16 13:58:15,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:15,403 INFO L93 Difference]: Finished difference Result 225 states and 527 transitions. [2020-09-16 13:58:15,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 13:58:15,405 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:15,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:15,405 INFO L225 Difference]: With dead ends: 225 [2020-09-16 13:58:15,406 INFO L226 Difference]: Without dead ends: 223 [2020-09-16 13:58:15,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:58:15,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-16 13:58:15,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-09-16 13:58:15,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-16 13:58:15,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-09-16 13:58:15,409 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-09-16 13:58:15,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:15,410 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-09-16 13:58:15,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:15,410 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-09-16 13:58:15,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:15,410 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:15,410 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:15,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-16 13:58:15,611 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:15,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:15,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1213023270, now seen corresponding path program 147 times [2020-09-16 13:58:15,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:15,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397373689] [2020-09-16 13:58:15,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:15,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397373689] [2020-09-16 13:58:15,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058811149] [2020-09-16 13:58:15,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:15,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:58:15,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:15,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:15,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:16,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:16,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:16,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167360848] [2020-09-16 13:58:16,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:16,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:16,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:16,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:16,122 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-09-16 13:58:16,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:16,654 INFO L93 Difference]: Finished difference Result 231 states and 539 transitions. [2020-09-16 13:58:16,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 13:58:16,655 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:16,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:16,656 INFO L225 Difference]: With dead ends: 231 [2020-09-16 13:58:16,656 INFO L226 Difference]: Without dead ends: 229 [2020-09-16 13:58:16,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-09-16 13:58:16,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-09-16 13:58:16,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 161. [2020-09-16 13:58:16,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-16 13:58:16,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-09-16 13:58:16,660 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-09-16 13:58:16,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:16,660 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-09-16 13:58:16,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:16,660 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-09-16 13:58:16,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:16,660 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:16,661 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:16,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:16,861 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:16,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:16,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1233549269, now seen corresponding path program 148 times [2020-09-16 13:58:16,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:16,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770290296] [2020-09-16 13:58:16,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:17,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770290296] [2020-09-16 13:58:17,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131039023] [2020-09-16 13:58:17,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:17,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:58:17,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:17,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:17,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:17,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:17,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:17,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868067523] [2020-09-16 13:58:17,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:17,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:17,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:17,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:17,334 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 17 states. [2020-09-16 13:58:17,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:17,586 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2020-09-16 13:58:17,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 13:58:17,588 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:17,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:17,589 INFO L225 Difference]: With dead ends: 200 [2020-09-16 13:58:17,589 INFO L226 Difference]: Without dead ends: 198 [2020-09-16 13:58:17,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:58:17,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-09-16 13:58:17,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 163. [2020-09-16 13:58:17,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 13:58:17,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 409 transitions. [2020-09-16 13:58:17,593 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 409 transitions. Word has length 14 [2020-09-16 13:58:17,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:17,593 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 409 transitions. [2020-09-16 13:58:17,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:17,593 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 409 transitions. [2020-09-16 13:58:17,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:17,594 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:17,594 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:17,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:17,797 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:17,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:17,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1233550230, now seen corresponding path program 149 times [2020-09-16 13:58:17,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:17,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334291481] [2020-09-16 13:58:17,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:17,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334291481] [2020-09-16 13:58:17,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919666207] [2020-09-16 13:58:17,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:18,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:58:18,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:18,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:18,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:18,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:18,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:18,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10755351] [2020-09-16 13:58:18,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:18,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:18,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:18,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:18,273 INFO L87 Difference]: Start difference. First operand 163 states and 409 transitions. Second operand 17 states. [2020-09-16 13:58:18,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:18,822 INFO L93 Difference]: Finished difference Result 221 states and 518 transitions. [2020-09-16 13:58:18,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:58:18,823 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:18,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:18,824 INFO L225 Difference]: With dead ends: 221 [2020-09-16 13:58:18,824 INFO L226 Difference]: Without dead ends: 219 [2020-09-16 13:58:18,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-09-16 13:58:18,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-16 13:58:18,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 162. [2020-09-16 13:58:18,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-16 13:58:18,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 405 transitions. [2020-09-16 13:58:18,827 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 405 transitions. Word has length 14 [2020-09-16 13:58:18,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:18,828 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 405 transitions. [2020-09-16 13:58:18,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:18,828 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 405 transitions. [2020-09-16 13:58:18,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:18,829 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:18,829 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:19,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-09-16 13:58:19,038 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:19,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:19,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1234212359, now seen corresponding path program 150 times [2020-09-16 13:58:19,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:19,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574566927] [2020-09-16 13:58:19,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:19,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574566927] [2020-09-16 13:58:19,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483645704] [2020-09-16 13:58:19,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:19,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:58:19,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:19,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 13:58:19,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:19,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:19,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-16 13:58:19,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979312016] [2020-09-16 13:58:19,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:58:19,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:19,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:58:19,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:58:19,305 INFO L87 Difference]: Start difference. First operand 162 states and 405 transitions. Second operand 11 states. [2020-09-16 13:58:19,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:19,541 INFO L93 Difference]: Finished difference Result 201 states and 476 transitions. [2020-09-16 13:58:19,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:58:19,542 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-16 13:58:19,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:19,543 INFO L225 Difference]: With dead ends: 201 [2020-09-16 13:58:19,543 INFO L226 Difference]: Without dead ends: 199 [2020-09-16 13:58:19,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-09-16 13:58:19,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-16 13:58:19,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2020-09-16 13:58:19,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 13:58:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-16 13:58:19,547 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-16 13:58:19,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:19,547 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-16 13:58:19,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:58:19,547 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-16 13:58:19,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:19,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:19,548 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:19,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:19,748 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:19,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:19,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1234234679, now seen corresponding path program 151 times [2020-09-16 13:58:19,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:19,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933334066] [2020-09-16 13:58:19,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:19,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933334066] [2020-09-16 13:58:19,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527393306] [2020-09-16 13:58:19,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:19,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:19,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:19,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:20,175 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:58:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:20,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:20,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:20,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137667979] [2020-09-16 13:58:20,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:20,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:20,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:20,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:20,239 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-16 13:58:20,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:20,869 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2020-09-16 13:58:20,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 13:58:20,870 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:20,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:20,871 INFO L225 Difference]: With dead ends: 226 [2020-09-16 13:58:20,871 INFO L226 Difference]: Without dead ends: 221 [2020-09-16 13:58:20,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-16 13:58:20,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-16 13:58:20,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 164. [2020-09-16 13:58:20,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 13:58:20,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-09-16 13:58:20,874 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-09-16 13:58:20,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:20,874 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-09-16 13:58:20,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:20,874 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-09-16 13:58:20,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:20,874 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:20,875 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:21,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:21,076 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:21,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:21,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1234242150, now seen corresponding path program 152 times [2020-09-16 13:58:21,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:21,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582526025] [2020-09-16 13:58:21,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:21,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582526025] [2020-09-16 13:58:21,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225461740] [2020-09-16 13:58:21,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:21,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:58:21,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:21,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:21,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:21,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:21,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:21,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:21,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951196109] [2020-09-16 13:58:21,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:21,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:21,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:21,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:21,560 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-09-16 13:58:22,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:22,093 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-16 13:58:22,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:58:22,094 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:22,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:22,094 INFO L225 Difference]: With dead ends: 218 [2020-09-16 13:58:22,094 INFO L226 Difference]: Without dead ends: 216 [2020-09-16 13:58:22,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:58:22,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-16 13:58:22,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-09-16 13:58:22,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 13:58:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-16 13:58:22,097 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-16 13:58:22,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:22,098 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-16 13:58:22,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:22,098 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-16 13:58:22,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:22,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:22,098 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:22,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:22,299 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:22,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:22,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1234263509, now seen corresponding path program 153 times [2020-09-16 13:58:22,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:22,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133361796] [2020-09-16 13:58:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:22,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133361796] [2020-09-16 13:58:22,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550287259] [2020-09-16 13:58:22,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:22,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:58:22,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:22,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:22,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:22,723 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:58:22,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:22,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:22,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:22,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513552038] [2020-09-16 13:58:22,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:22,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:22,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:22,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:22,785 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-16 13:58:23,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:23,722 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-09-16 13:58:23,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 13:58:23,724 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:23,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:23,724 INFO L225 Difference]: With dead ends: 248 [2020-09-16 13:58:23,724 INFO L226 Difference]: Without dead ends: 243 [2020-09-16 13:58:23,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-09-16 13:58:23,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-16 13:58:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 166. [2020-09-16 13:58:23,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 13:58:23,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-16 13:58:23,728 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-16 13:58:23,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:23,728 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-16 13:58:23,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:23,728 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-16 13:58:23,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:23,728 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:23,728 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:23,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:23,929 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:23,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:23,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1234264470, now seen corresponding path program 154 times [2020-09-16 13:58:23,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:23,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150513883] [2020-09-16 13:58:23,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:24,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150513883] [2020-09-16 13:58:24,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230279902] [2020-09-16 13:58:24,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:24,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:58:24,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:24,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:24,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:24,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:58:24,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:24,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:24,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:24,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963094407] [2020-09-16 13:58:24,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:24,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:24,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:24,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:24,418 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-16 13:58:25,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:25,150 INFO L93 Difference]: Finished difference Result 238 states and 567 transitions. [2020-09-16 13:58:25,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 13:58:25,152 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:25,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:25,153 INFO L225 Difference]: With dead ends: 238 [2020-09-16 13:58:25,153 INFO L226 Difference]: Without dead ends: 233 [2020-09-16 13:58:25,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-16 13:58:25,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-16 13:58:25,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-09-16 13:58:25,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-16 13:58:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-09-16 13:58:25,157 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-09-16 13:58:25,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:25,157 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-09-16 13:58:25,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:25,157 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-09-16 13:58:25,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:25,157 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:25,157 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:25,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:25,359 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:25,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:25,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1234472790, now seen corresponding path program 155 times [2020-09-16 13:58:25,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:25,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535258502] [2020-09-16 13:58:25,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:25,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535258502] [2020-09-16 13:58:25,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997914285] [2020-09-16 13:58:25,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:25,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:58:25,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:25,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:25,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:25,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:25,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:25,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:25,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419383934] [2020-09-16 13:58:25,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:25,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:25,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:25,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:25,928 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-09-16 13:58:26,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:26,717 INFO L93 Difference]: Finished difference Result 235 states and 547 transitions. [2020-09-16 13:58:26,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 13:58:26,718 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:26,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:26,718 INFO L225 Difference]: With dead ends: 235 [2020-09-16 13:58:26,718 INFO L226 Difference]: Without dead ends: 233 [2020-09-16 13:58:26,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:58:26,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-16 13:58:26,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-09-16 13:58:26,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 13:58:26,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-09-16 13:58:26,723 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-09-16 13:58:26,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:26,724 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-09-16 13:58:26,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:26,724 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-09-16 13:58:26,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:26,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:26,725 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:26,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:26,935 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:26,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:26,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1235135880, now seen corresponding path program 156 times [2020-09-16 13:58:26,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:26,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328279267] [2020-09-16 13:58:26,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:27,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328279267] [2020-09-16 13:58:27,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344971907] [2020-09-16 13:58:27,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:27,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:58:27,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:27,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:27,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:27,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:27,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:27,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924642539] [2020-09-16 13:58:27,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:27,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:27,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:27,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:27,489 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-09-16 13:58:28,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:28,356 INFO L93 Difference]: Finished difference Result 252 states and 594 transitions. [2020-09-16 13:58:28,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 13:58:28,357 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:28,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:28,358 INFO L225 Difference]: With dead ends: 252 [2020-09-16 13:58:28,358 INFO L226 Difference]: Without dead ends: 250 [2020-09-16 13:58:28,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-09-16 13:58:28,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-09-16 13:58:28,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2020-09-16 13:58:28,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 13:58:28,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-16 13:58:28,362 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-16 13:58:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:28,363 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-16 13:58:28,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:28,363 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-16 13:58:28,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:28,363 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:28,363 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:28,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-16 13:58:28,572 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:28,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:28,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1235157239, now seen corresponding path program 157 times [2020-09-16 13:58:28,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:28,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249985819] [2020-09-16 13:58:28,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:28,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249985819] [2020-09-16 13:58:28,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180055170] [2020-09-16 13:58:28,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:28,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:28,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:29,036 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:58:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:29,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:29,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:29,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258077681] [2020-09-16 13:58:29,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:29,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:29,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:29,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:29,099 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-16 13:58:30,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:30,131 INFO L93 Difference]: Finished difference Result 258 states and 617 transitions. [2020-09-16 13:58:30,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 13:58:30,132 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:30,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:30,133 INFO L225 Difference]: With dead ends: 258 [2020-09-16 13:58:30,133 INFO L226 Difference]: Without dead ends: 253 [2020-09-16 13:58:30,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2020-09-16 13:58:30,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-16 13:58:30,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-09-16 13:58:30,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 13:58:30,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-16 13:58:30,138 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-16 13:58:30,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:30,138 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-16 13:58:30,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:30,138 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-16 13:58:30,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:30,138 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:30,138 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:30,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-09-16 13:58:30,341 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:30,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:30,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1235158200, now seen corresponding path program 158 times [2020-09-16 13:58:30,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:30,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378396373] [2020-09-16 13:58:30,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:30,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:30,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378396373] [2020-09-16 13:58:30,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704045341] [2020-09-16 13:58:30,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:30,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:58:30,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:30,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:30,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:32,824 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:58:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:32,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:32,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:32,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028345571] [2020-09-16 13:58:32,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:32,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:32,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:32,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-09-16 13:58:32,877 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-16 13:58:37,258 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-09-16 13:58:41,591 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-09-16 13:58:42,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:42,409 INFO L93 Difference]: Finished difference Result 287 states and 685 transitions. [2020-09-16 13:58:42,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 13:58:42,410 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:42,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:42,411 INFO L225 Difference]: With dead ends: 287 [2020-09-16 13:58:42,411 INFO L226 Difference]: Without dead ends: 279 [2020-09-16 13:58:42,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=370, Invalid=819, Unknown=1, NotChecked=0, Total=1190 [2020-09-16 13:58:42,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-09-16 13:58:42,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 162. [2020-09-16 13:58:42,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-16 13:58:42,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 400 transitions. [2020-09-16 13:58:42,415 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 400 transitions. Word has length 14 [2020-09-16 13:58:42,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:42,415 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 400 transitions. [2020-09-16 13:58:42,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:42,416 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 400 transitions. [2020-09-16 13:58:42,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:42,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:42,416 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:42,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-09-16 13:58:42,621 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:42,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:42,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1235187030, now seen corresponding path program 159 times [2020-09-16 13:58:42,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:42,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360808244] [2020-09-16 13:58:42,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:42,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360808244] [2020-09-16 13:58:42,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817604370] [2020-09-16 13:58:42,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:42,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:58:42,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:42,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:42,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:43,130 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:58:43,137 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:58:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:43,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:43,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:43,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836892664] [2020-09-16 13:58:43,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:43,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:43,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:43,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:43,188 INFO L87 Difference]: Start difference. First operand 162 states and 400 transitions. Second operand 17 states. [2020-09-16 13:58:44,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:44,246 INFO L93 Difference]: Finished difference Result 260 states and 621 transitions. [2020-09-16 13:58:44,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 13:58:44,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:44,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:44,248 INFO L225 Difference]: With dead ends: 260 [2020-09-16 13:58:44,249 INFO L226 Difference]: Without dead ends: 255 [2020-09-16 13:58:44,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-09-16 13:58:44,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-09-16 13:58:44,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 160. [2020-09-16 13:58:44,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-16 13:58:44,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2020-09-16 13:58:44,252 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 14 [2020-09-16 13:58:44,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:44,252 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2020-09-16 13:58:44,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:44,253 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2020-09-16 13:58:44,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:44,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:44,253 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:44,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:44,454 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:44,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:44,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1241622630, now seen corresponding path program 160 times [2020-09-16 13:58:44,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:44,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098669310] [2020-09-16 13:58:44,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:44,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098669310] [2020-09-16 13:58:44,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363071926] [2020-09-16 13:58:44,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:44,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:58:44,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:44,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:44,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:45,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:45,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:45,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453588137] [2020-09-16 13:58:45,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:45,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:45,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:45,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:45,001 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 17 states. [2020-09-16 13:58:45,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:45,694 INFO L93 Difference]: Finished difference Result 235 states and 543 transitions. [2020-09-16 13:58:45,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 13:58:45,695 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:45,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:45,696 INFO L225 Difference]: With dead ends: 235 [2020-09-16 13:58:45,696 INFO L226 Difference]: Without dead ends: 233 [2020-09-16 13:58:45,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:58:45,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-16 13:58:45,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-09-16 13:58:45,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 13:58:45,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 401 transitions. [2020-09-16 13:58:45,700 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 401 transitions. Word has length 14 [2020-09-16 13:58:45,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:45,700 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 401 transitions. [2020-09-16 13:58:45,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:45,700 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 401 transitions. [2020-09-16 13:58:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:45,701 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:45,701 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:45,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:45,902 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:45,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:45,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1241623591, now seen corresponding path program 161 times [2020-09-16 13:58:45,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:45,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992330656] [2020-09-16 13:58:45,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:46,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992330656] [2020-09-16 13:58:46,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638663316] [2020-09-16 13:58:46,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:46,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:58:46,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:46,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:46,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:49,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:49,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:49,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084803817] [2020-09-16 13:58:49,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:49,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:49,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:49,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2020-09-16 13:58:49,319 INFO L87 Difference]: Start difference. First operand 163 states and 401 transitions. Second operand 17 states. [2020-09-16 13:58:53,732 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-16 13:59:00,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:59:00,242 INFO L93 Difference]: Finished difference Result 241 states and 556 transitions. [2020-09-16 13:59:00,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 13:59:00,243 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:59:00,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:59:00,244 INFO L225 Difference]: With dead ends: 241 [2020-09-16 13:59:00,244 INFO L226 Difference]: Without dead ends: 239 [2020-09-16 13:59:00,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=193, Invalid=508, Unknown=1, NotChecked=0, Total=702 [2020-09-16 13:59:00,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-16 13:59:00,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-09-16 13:59:00,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 13:59:00,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 400 transitions. [2020-09-16 13:59:00,249 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 400 transitions. Word has length 14 [2020-09-16 13:59:00,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:59:00,249 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 400 transitions. [2020-09-16 13:59:00,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:59:00,250 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 400 transitions. [2020-09-16 13:59:00,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:59:00,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:59:00,250 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:59:00,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-09-16 13:59:00,451 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:59:00,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:59:00,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1241652421, now seen corresponding path program 162 times [2020-09-16 13:59:00,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:59:00,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454192382] [2020-09-16 13:59:00,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:59:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:59:00,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:00,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454192382] [2020-09-16 13:59:00,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128766905] [2020-09-16 13:59:00,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:59:00,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:59:00,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:59:00,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:59:00,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:59:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:01,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:59:01,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:59:01,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646043192] [2020-09-16 13:59:01,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:59:01,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:59:01,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:59:01,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:59:01,033 INFO L87 Difference]: Start difference. First operand 163 states and 400 transitions. Second operand 17 states. [2020-09-16 13:59:01,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:59:01,744 INFO L93 Difference]: Finished difference Result 235 states and 546 transitions. [2020-09-16 13:59:01,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 13:59:01,745 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:59:01,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:59:01,746 INFO L225 Difference]: With dead ends: 235 [2020-09-16 13:59:01,746 INFO L226 Difference]: Without dead ends: 233 [2020-09-16 13:59:01,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:59:01,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-16 13:59:01,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-09-16 13:59:01,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-16 13:59:01,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-09-16 13:59:01,750 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-09-16 13:59:01,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:59:01,750 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-09-16 13:59:01,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:59:01,751 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-09-16 13:59:01,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:59:01,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:59:01,751 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:59:01,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:59:01,952 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:59:01,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:59:01,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1262178420, now seen corresponding path program 163 times [2020-09-16 13:59:01,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:59:01,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011882046] [2020-09-16 13:59:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:59:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:59:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:02,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011882046] [2020-09-16 13:59:02,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951796441] [2020-09-16 13:59:02,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:59:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:59:02,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:59:02,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:59:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:02,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:59:02,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:59:02,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410805883] [2020-09-16 13:59:02,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:59:02,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:59:02,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:59:02,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:59:02,464 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-09-16 13:59:03,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:59:03,508 INFO L93 Difference]: Finished difference Result 254 states and 587 transitions. [2020-09-16 13:59:03,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 13:59:03,509 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:59:03,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:59:03,510 INFO L225 Difference]: With dead ends: 254 [2020-09-16 13:59:03,510 INFO L226 Difference]: Without dead ends: 252 [2020-09-16 13:59:03,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-09-16 13:59:03,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-09-16 13:59:03,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 164. [2020-09-16 13:59:03,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 13:59:03,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 405 transitions. [2020-09-16 13:59:03,514 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 405 transitions. Word has length 14 [2020-09-16 13:59:03,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:59:03,514 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 405 transitions. [2020-09-16 13:59:03,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:59:03,514 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 405 transitions. [2020-09-16 13:59:03,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:59:03,514 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:59:03,514 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:59:03,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2020-09-16 13:59:03,716 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:59:03,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:59:03,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1262179381, now seen corresponding path program 164 times [2020-09-16 13:59:03,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:59:03,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154356859] [2020-09-16 13:59:03,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:59:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:59:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:03,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154356859] [2020-09-16 13:59:03,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94195038] [2020-09-16 13:59:03,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:59:03,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:59:03,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:59:03,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:59:03,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:59:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:06,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:59:06,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:59:06,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520754397] [2020-09-16 13:59:06,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:59:06,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:59:06,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:59:06,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:59:06,490 INFO L87 Difference]: Start difference. First operand 164 states and 405 transitions. Second operand 17 states. [2020-09-16 13:59:10,987 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-16 13:59:25,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:59:25,970 INFO L93 Difference]: Finished difference Result 264 states and 610 transitions. [2020-09-16 13:59:25,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 13:59:25,971 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:59:25,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:59:25,972 INFO L225 Difference]: With dead ends: 264 [2020-09-16 13:59:25,972 INFO L226 Difference]: Without dead ends: 262 [2020-09-16 13:59:25,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=289, Invalid=699, Unknown=4, NotChecked=0, Total=992 [2020-09-16 13:59:25,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-16 13:59:25,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 165. [2020-09-16 13:59:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-16 13:59:25,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-09-16 13:59:25,980 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-09-16 13:59:25,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:59:25,980 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-09-16 13:59:25,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:59:25,980 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-09-16 13:59:25,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:59:25,980 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:59:25,980 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:59:26,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:59:26,181 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:59:26,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:59:26,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1262841510, now seen corresponding path program 165 times [2020-09-16 13:59:26,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:59:26,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190430982] [2020-09-16 13:59:26,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:59:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:59:26,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:26,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190430982] [2020-09-16 13:59:26,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146397505] [2020-09-16 13:59:26,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:59:26,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:59:26,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:59:26,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:59:26,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:59:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:26,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:59:26,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:59:26,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132426999] [2020-09-16 13:59:26,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:59:26,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:59:26,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:59:26,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:59:26,812 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-09-16 13:59:27,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:59:27,843 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2020-09-16 13:59:27,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-16 13:59:27,844 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:59:27,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:59:27,845 INFO L225 Difference]: With dead ends: 255 [2020-09-16 13:59:27,845 INFO L226 Difference]: Without dead ends: 253 [2020-09-16 13:59:27,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-09-16 13:59:27,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-16 13:59:27,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-09-16 13:59:27,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 13:59:27,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-16 13:59:27,849 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-16 13:59:27,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:59:27,849 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-16 13:59:27,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:59:27,849 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-16 13:59:27,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:59:27,850 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:59:27,850 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:59:28,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:59:28,051 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:59:28,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:59:28,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1262862869, now seen corresponding path program 166 times [2020-09-16 13:59:28,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:59:28,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032927123] [2020-09-16 13:59:28,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:59:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:59:28,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:28,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032927123] [2020-09-16 13:59:28,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037753386] [2020-09-16 13:59:28,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:59:28,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:59:28,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:59:28,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:59:28,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:59:28,582 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:59:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:28,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:59:28,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:59:28,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340372421] [2020-09-16 13:59:28,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:59:28,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:59:28,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:59:28,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:59:28,654 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-16 13:59:30,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:59:30,057 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2020-09-16 13:59:30,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 13:59:30,059 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:59:30,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:59:30,060 INFO L225 Difference]: With dead ends: 256 [2020-09-16 13:59:30,060 INFO L226 Difference]: Without dead ends: 251 [2020-09-16 13:59:30,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2020-09-16 13:59:30,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-16 13:59:30,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 167. [2020-09-16 13:59:30,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 13:59:30,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-16 13:59:30,064 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-16 13:59:30,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:59:30,065 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-16 13:59:30,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:59:30,065 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-16 13:59:30,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:59:30,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:59:30,066 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:59:30,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-16 13:59:30,275 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:59:30,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:59:30,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1262863830, now seen corresponding path program 167 times [2020-09-16 13:59:30,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:59:30,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720274165] [2020-09-16 13:59:30,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:59:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:59:30,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:30,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720274165] [2020-09-16 13:59:30,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375080071] [2020-09-16 13:59:30,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:59:30,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:59:30,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:59:30,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:59:30,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:59:31,897 WARN L860 $PredicateComparison]: unable to prove that (exists ((aux_mod_59 Int) (aux_div_59 Int) (aux_div_49 Int) (aux_div_54 Int)) (let ((.cse4 (* 2 aux_mod_59))) (let ((.cse3 (* 2 aux_div_49)) (.cse2 (+ .cse4 c_~i~0)) (.cse1 (+ .cse4 (* 2 aux_div_54))) (.cse0 (* 4 aux_div_59))) (and (<= aux_div_49 1) (< (+ .cse0 2) .cse1) (<= c_~j~0 (+ c_~i~0 aux_div_54)) (<= .cse2 (+ .cse0 .cse3 5)) (<= 0 aux_mod_59) (< aux_mod_59 2) (< (+ .cse0 .cse3 3) .cse2) (<= aux_div_59 1) (<= .cse1 (+ .cse0 4)))))) is different from true [2020-09-16 13:59:31,918 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:59:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:32,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:59:32,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:59:32,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026626546] [2020-09-16 13:59:32,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:59:32,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:59:32,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:59:32,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=160, Unknown=1, NotChecked=28, Total=272 [2020-09-16 13:59:32,115 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-16 13:59:32,876 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 20 [2020-09-16 13:59:47,427 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-16 13:59:47,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:59:47,601 INFO L93 Difference]: Finished difference Result 288 states and 693 transitions. [2020-09-16 13:59:47,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 13:59:47,603 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:59:47,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:59:47,603 INFO L225 Difference]: With dead ends: 288 [2020-09-16 13:59:47,604 INFO L226 Difference]: Without dead ends: 283 [2020-09-16 13:59:47,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=408, Invalid=924, Unknown=4, NotChecked=70, Total=1406 [2020-09-16 13:59:47,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-09-16 13:59:47,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 165. [2020-09-16 13:59:47,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-16 13:59:47,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-09-16 13:59:47,607 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-09-16 13:59:47,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:59:47,607 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-09-16 13:59:47,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:59:47,608 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-09-16 13:59:47,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:59:47,608 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:59:47,608 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:59:47,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-09-16 13:59:47,809 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:59:47,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:59:47,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1262871301, now seen corresponding path program 168 times [2020-09-16 13:59:47,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:59:47,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167669578] [2020-09-16 13:59:47,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:59:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:59:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:47,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167669578] [2020-09-16 13:59:47,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018383416] [2020-09-16 13:59:47,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:59:48,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:59:48,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:59:48,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:59:48,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:59:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:50,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:59:50,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:59:50,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626701739] [2020-09-16 13:59:50,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:59:50,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:59:50,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:59:50,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-09-16 13:59:50,551 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-09-16 13:59:55,015 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-16 13:59:59,295 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-16 14:00:00,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:00:00,068 INFO L93 Difference]: Finished difference Result 271 states and 639 transitions. [2020-09-16 14:00:00,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-16 14:00:00,070 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:00:00,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:00:00,071 INFO L225 Difference]: With dead ends: 271 [2020-09-16 14:00:00,071 INFO L226 Difference]: Without dead ends: 269 [2020-09-16 14:00:00,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=348, Invalid=841, Unknown=1, NotChecked=0, Total=1190 [2020-09-16 14:00:00,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-16 14:00:00,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 167. [2020-09-16 14:00:00,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 14:00:00,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-16 14:00:00,076 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-16 14:00:00,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:00:00,076 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-16 14:00:00,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:00:00,076 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-16 14:00:00,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:00:00,077 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:00:00,077 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:00:00,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-16 14:00:00,288 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:00:00,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:00:00,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1262892660, now seen corresponding path program 169 times [2020-09-16 14:00:00,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:00:00,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473129709] [2020-09-16 14:00:00,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:00:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:00:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:00,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473129709] [2020-09-16 14:00:00,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631498370] [2020-09-16 14:00:00,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:00:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:00:00,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:00:00,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:00:03,947 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_554 Int) (aux_div_70 Int) (aux_div_43 Int)) (let ((.cse0 (* 2 aux_div_70)) (.cse1 (* 2 aux_div_43))) (and (<= c_~j~0 (+ v_~i~0_554 .cse0 2)) (<= (+ c_~j~0 .cse1) (* 2 v_~i~0_554)) (<= v_~i~0_554 (+ .cse0 .cse1 3)) (<= aux_div_70 1) (<= aux_div_43 1) (<= (+ .cse0 .cse1 1) v_~i~0_554) (<= c_~i~0 (+ v_~i~0_554 c_~j~0))))) is different from true [2020-09-16 14:00:03,956 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:00:03,960 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:00:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:04,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:00:04,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:00:04,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781034485] [2020-09-16 14:00:04,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:00:04,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:00:04,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:00:04,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=162, Unknown=2, NotChecked=28, Total=272 [2020-09-16 14:00:04,034 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-16 14:00:04,478 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-09-16 14:00:08,645 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-16 14:00:12,488 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-09-16 14:00:16,646 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-09-16 14:00:25,767 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2020-09-16 14:00:26,024 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-09-16 14:00:28,714 WARN L193 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-09-16 14:00:37,586 WARN L193 SmtUtils]: Spent 946.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-09-16 14:00:38,930 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-09-16 14:00:44,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:00:44,170 INFO L93 Difference]: Finished difference Result 292 states and 717 transitions. [2020-09-16 14:00:44,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-16 14:00:44,172 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:00:44,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:00:44,173 INFO L225 Difference]: With dead ends: 292 [2020-09-16 14:00:44,173 INFO L226 Difference]: Without dead ends: 287 [2020-09-16 14:00:44,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 43.2s TimeCoverageRelationStatistics Valid=482, Invalid=1065, Unknown=17, NotChecked=76, Total=1640 [2020-09-16 14:00:44,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-09-16 14:00:44,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 168. [2020-09-16 14:00:44,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-16 14:00:44,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 421 transitions. [2020-09-16 14:00:44,177 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 421 transitions. Word has length 14 [2020-09-16 14:00:44,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:00:44,177 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 421 transitions. [2020-09-16 14:00:44,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:00:44,177 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 421 transitions. [2020-09-16 14:00:44,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:00:44,177 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:00:44,178 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:00:44,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-09-16 14:00:44,378 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:00:44,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:00:44,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1262893621, now seen corresponding path program 170 times [2020-09-16 14:00:44,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:00:44,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143854915] [2020-09-16 14:00:44,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:00:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:00:44,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:44,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143854915] [2020-09-16 14:00:44,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409200494] [2020-09-16 14:00:44,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:00:44,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:00:44,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:00:44,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:00:44,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:00:46,968 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:00:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:47,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:00:47,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:00:47,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952572787] [2020-09-16 14:00:47,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:00:47,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:00:47,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:00:47,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-09-16 14:00:47,088 INFO L87 Difference]: Start difference. First operand 168 states and 421 transitions. Second operand 17 states. [2020-09-16 14:00:49,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:00:49,345 INFO L93 Difference]: Finished difference Result 292 states and 701 transitions. [2020-09-16 14:00:49,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:00:49,348 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:00:49,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:00:49,348 INFO L225 Difference]: With dead ends: 292 [2020-09-16 14:00:49,349 INFO L226 Difference]: Without dead ends: 284 [2020-09-16 14:00:49,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=425, Invalid=980, Unknown=1, NotChecked=0, Total=1406 [2020-09-16 14:00:49,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-16 14:00:49,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 162. [2020-09-16 14:00:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-16 14:00:49,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-09-16 14:00:49,352 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-09-16 14:00:49,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:00:49,352 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-09-16 14:00:49,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:00:49,352 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-09-16 14:00:49,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:00:49,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:00:49,353 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:00:49,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-16 14:00:49,554 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:00:49,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:00:49,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1263101941, now seen corresponding path program 171 times [2020-09-16 14:00:49,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:00:49,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108564541] [2020-09-16 14:00:49,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:00:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:00:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:49,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108564541] [2020-09-16 14:00:49,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178128782] [2020-09-16 14:00:49,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:00:49,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:00:49,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:00:49,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:00:49,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:00:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:50,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:00:50,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:00:50,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400410516] [2020-09-16 14:00:50,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:00:50,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:00:50,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:00:50,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:00:50,188 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-09-16 14:00:50,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:00:50,910 INFO L93 Difference]: Finished difference Result 231 states and 545 transitions. [2020-09-16 14:00:50,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:00:50,912 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:00:50,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:00:50,913 INFO L225 Difference]: With dead ends: 231 [2020-09-16 14:00:50,913 INFO L226 Difference]: Without dead ends: 229 [2020-09-16 14:00:50,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:00:50,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-09-16 14:00:50,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 162. [2020-09-16 14:00:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-16 14:00:50,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-09-16 14:00:50,916 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-09-16 14:00:50,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:00:50,916 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-09-16 14:00:50,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:00:50,916 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-09-16 14:00:50,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:00:50,917 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:00:50,917 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:00:51,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2020-09-16 14:00:51,118 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:00:51,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:00:51,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1263765031, now seen corresponding path program 172 times [2020-09-16 14:00:51,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:00:51,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911062293] [2020-09-16 14:00:51,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:00:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:00:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:51,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911062293] [2020-09-16 14:00:51,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79808985] [2020-09-16 14:00:51,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:00:51,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:00:51,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:00:51,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:00:51,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:00:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:51,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:00:51,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:00:51,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581245351] [2020-09-16 14:00:51,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:00:51,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:00:51,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:00:51,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:00:51,728 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-09-16 14:00:52,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:00:52,927 INFO L93 Difference]: Finished difference Result 250 states and 594 transitions. [2020-09-16 14:00:52,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 14:00:52,928 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:00:52,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:00:52,929 INFO L225 Difference]: With dead ends: 250 [2020-09-16 14:00:52,929 INFO L226 Difference]: Without dead ends: 248 [2020-09-16 14:00:52,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2020-09-16 14:00:52,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-09-16 14:00:52,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 163. [2020-09-16 14:00:52,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 14:00:52,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 405 transitions. [2020-09-16 14:00:52,933 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 405 transitions. Word has length 14 [2020-09-16 14:00:52,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:00:52,933 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 405 transitions. [2020-09-16 14:00:52,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:00:52,933 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 405 transitions. [2020-09-16 14:00:52,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:00:52,934 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:00:52,934 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:00:53,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:00:53,135 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:00:53,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:00:53,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1263787351, now seen corresponding path program 173 times [2020-09-16 14:00:53,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:00:53,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140322548] [2020-09-16 14:00:53,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:00:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:00:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:53,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140322548] [2020-09-16 14:00:53,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556502553] [2020-09-16 14:00:53,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:00:53,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:00:53,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:00:53,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:00:53,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:00:53,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:00:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:53,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:00:53,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:00:53,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930758396] [2020-09-16 14:00:53,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:00:53,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:00:53,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:00:53,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:00:53,762 INFO L87 Difference]: Start difference. First operand 163 states and 405 transitions. Second operand 17 states. [2020-09-16 14:00:55,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:00:55,598 INFO L93 Difference]: Finished difference Result 288 states and 686 transitions. [2020-09-16 14:00:55,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:00:55,599 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:00:55,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:00:55,600 INFO L225 Difference]: With dead ends: 288 [2020-09-16 14:00:55,600 INFO L226 Difference]: Without dead ends: 283 [2020-09-16 14:00:55,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-09-16 14:00:55,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-09-16 14:00:55,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 159. [2020-09-16 14:00:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-16 14:00:55,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 388 transitions. [2020-09-16 14:00:55,604 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 388 transitions. Word has length 14 [2020-09-16 14:00:55,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:00:55,605 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 388 transitions. [2020-09-16 14:00:55,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:00:55,605 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 388 transitions. [2020-09-16 14:00:55,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:00:55,605 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:00:55,605 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:00:55,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-09-16 14:00:55,806 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:00:55,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:00:55,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1463267670, now seen corresponding path program 174 times [2020-09-16 14:00:55,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:00:55,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983914952] [2020-09-16 14:00:55,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:00:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:00:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:55,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983914952] [2020-09-16 14:00:55,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465715911] [2020-09-16 14:00:55,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:00:56,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:00:56,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:00:56,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:00:56,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:00:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:56,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:00:56,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:00:56,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098831483] [2020-09-16 14:00:56,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:00:56,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:00:56,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:00:56,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:00:56,392 INFO L87 Difference]: Start difference. First operand 159 states and 388 transitions. Second operand 17 states. [2020-09-16 14:00:57,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:00:57,090 INFO L93 Difference]: Finished difference Result 236 states and 544 transitions. [2020-09-16 14:00:57,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:00:57,093 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:00:57,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:00:57,094 INFO L225 Difference]: With dead ends: 236 [2020-09-16 14:00:57,094 INFO L226 Difference]: Without dead ends: 234 [2020-09-16 14:00:57,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-09-16 14:00:57,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-09-16 14:00:57,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-09-16 14:00:57,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 14:00:57,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-16 14:00:57,097 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-16 14:00:57,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:00:57,097 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-16 14:00:57,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:00:57,097 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-16 14:00:57,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:00:57,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:00:57,098 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:00:57,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:00:57,299 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:00:57,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:00:57,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1463268631, now seen corresponding path program 175 times [2020-09-16 14:00:57,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:00:57,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402404302] [2020-09-16 14:00:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:00:57,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:00:57,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:57,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402404302] [2020-09-16 14:00:57,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862919517] [2020-09-16 14:00:57,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:00:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:00:57,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:00:57,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:00:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:57,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:00:57,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:00:57,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892477375] [2020-09-16 14:00:57,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:00:57,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:00:57,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:00:57,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:00:57,837 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-16 14:00:58,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:00:58,617 INFO L93 Difference]: Finished difference Result 246 states and 565 transitions. [2020-09-16 14:00:58,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:00:58,620 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:00:58,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:00:58,620 INFO L225 Difference]: With dead ends: 246 [2020-09-16 14:00:58,621 INFO L226 Difference]: Without dead ends: 244 [2020-09-16 14:00:58,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-09-16 14:00:58,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-16 14:00:58,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 163. [2020-09-16 14:00:58,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 14:00:58,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-16 14:00:58,624 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-16 14:00:58,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:00:58,624 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-16 14:00:58,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:00:58,624 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-16 14:00:58,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:00:58,624 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:00:58,625 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:00:58,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:00:58,826 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:00:58,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:00:58,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1463297461, now seen corresponding path program 176 times [2020-09-16 14:00:58,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:00:58,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619762517] [2020-09-16 14:00:58,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:00:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:00:59,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:59,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619762517] [2020-09-16 14:00:59,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736514550] [2020-09-16 14:00:59,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:00:59,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:00:59,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:00:59,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:00:59,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:00:59,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:59,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:00:59,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:00:59,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628922553] [2020-09-16 14:00:59,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:00:59,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:00:59,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:00:59,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:00:59,360 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-16 14:00:59,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:00:59,957 INFO L93 Difference]: Finished difference Result 239 states and 554 transitions. [2020-09-16 14:00:59,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:00:59,958 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:00:59,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:00:59,959 INFO L225 Difference]: With dead ends: 239 [2020-09-16 14:00:59,959 INFO L226 Difference]: Without dead ends: 237 [2020-09-16 14:00:59,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:00:59,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-16 14:00:59,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-09-16 14:00:59,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 14:00:59,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-16 14:00:59,963 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-16 14:00:59,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:00:59,963 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-16 14:00:59,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:00:59,963 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-16 14:00:59,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:00:59,964 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:00:59,964 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:00,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:00,165 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:00,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:00,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1464221943, now seen corresponding path program 177 times [2020-09-16 14:01:00,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:00,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779790779] [2020-09-16 14:01:00,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:00,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779790779] [2020-09-16 14:01:00,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940391916] [2020-09-16 14:01:00,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:00,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:01:00,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:00,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:00,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:00,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:00,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:00,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384542114] [2020-09-16 14:01:00,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:00,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:00,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:00,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:00,742 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-16 14:01:01,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:01,331 INFO L93 Difference]: Finished difference Result 229 states and 529 transitions. [2020-09-16 14:01:01,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:01:01,333 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:01,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:01,334 INFO L225 Difference]: With dead ends: 229 [2020-09-16 14:01:01,334 INFO L226 Difference]: Without dead ends: 227 [2020-09-16 14:01:01,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-09-16 14:01:01,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-16 14:01:01,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-09-16 14:01:01,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-16 14:01:01,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-09-16 14:01:01,337 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-09-16 14:01:01,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:01,337 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-09-16 14:01:01,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:01,337 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-09-16 14:01:01,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:01,338 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:01,338 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:01,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-09-16 14:01:01,539 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:01,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:01,539 INFO L82 PathProgramCache]: Analyzing trace with hash 2100497160, now seen corresponding path program 178 times [2020-09-16 14:01:01,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:01,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003028620] [2020-09-16 14:01:01,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:01,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:01,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003028620] [2020-09-16 14:01:01,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687940718] [2020-09-16 14:01:01,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:01,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:01:01,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:01,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:01,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:02,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:02,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:02,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513929997] [2020-09-16 14:01:02,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:02,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:02,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:02,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:02,061 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-09-16 14:01:03,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:03,301 INFO L93 Difference]: Finished difference Result 261 states and 599 transitions. [2020-09-16 14:01:03,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:01:03,303 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:03,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:03,304 INFO L225 Difference]: With dead ends: 261 [2020-09-16 14:01:03,304 INFO L226 Difference]: Without dead ends: 259 [2020-09-16 14:01:03,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2020-09-16 14:01:03,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-16 14:01:03,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 164. [2020-09-16 14:01:03,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 14:01:03,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 406 transitions. [2020-09-16 14:01:03,308 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 406 transitions. Word has length 14 [2020-09-16 14:01:03,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:03,308 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 406 transitions. [2020-09-16 14:01:03,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:03,308 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 406 transitions. [2020-09-16 14:01:03,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:03,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:03,308 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:03,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:03,509 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:03,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:03,510 INFO L82 PathProgramCache]: Analyzing trace with hash 2100498121, now seen corresponding path program 179 times [2020-09-16 14:01:03,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:03,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384838375] [2020-09-16 14:01:03,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:03,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384838375] [2020-09-16 14:01:03,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995851609] [2020-09-16 14:01:03,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:03,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:01:03,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:03,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:03,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:04,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:04,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:04,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:04,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472105086] [2020-09-16 14:01:04,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:04,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:04,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:04,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:04,043 INFO L87 Difference]: Start difference. First operand 164 states and 406 transitions. Second operand 17 states. [2020-09-16 14:01:05,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:05,190 INFO L93 Difference]: Finished difference Result 271 states and 622 transitions. [2020-09-16 14:01:05,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:01:05,192 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:05,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:05,193 INFO L225 Difference]: With dead ends: 271 [2020-09-16 14:01:05,193 INFO L226 Difference]: Without dead ends: 269 [2020-09-16 14:01:05,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2020-09-16 14:01:05,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-16 14:01:05,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 166. [2020-09-16 14:01:05,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 14:01:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 413 transitions. [2020-09-16 14:01:05,197 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 413 transitions. Word has length 14 [2020-09-16 14:01:05,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:05,197 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 413 transitions. [2020-09-16 14:01:05,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:05,197 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 413 transitions. [2020-09-16 14:01:05,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:05,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:05,198 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:05,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-09-16 14:01:05,399 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:05,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:05,399 INFO L82 PathProgramCache]: Analyzing trace with hash 2100526951, now seen corresponding path program 180 times [2020-09-16 14:01:05,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:05,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917504526] [2020-09-16 14:01:05,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:05,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917504526] [2020-09-16 14:01:05,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744105018] [2020-09-16 14:01:05,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:05,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:01:05,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:05,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:05,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:05,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:05,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:05,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299825379] [2020-09-16 14:01:05,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:05,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:05,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:05,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:05,912 INFO L87 Difference]: Start difference. First operand 166 states and 413 transitions. Second operand 17 states. [2020-09-16 14:01:06,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:06,866 INFO L93 Difference]: Finished difference Result 253 states and 588 transitions. [2020-09-16 14:01:06,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 14:01:06,868 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:06,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:06,869 INFO L225 Difference]: With dead ends: 253 [2020-09-16 14:01:06,869 INFO L226 Difference]: Without dead ends: 251 [2020-09-16 14:01:06,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=274, Invalid=718, Unknown=0, NotChecked=0, Total=992 [2020-09-16 14:01:06,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-16 14:01:06,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2020-09-16 14:01:06,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-16 14:01:06,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-09-16 14:01:06,872 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-09-16 14:01:06,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:06,873 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-09-16 14:01:06,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:06,873 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-09-16 14:01:06,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:06,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:06,873 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:07,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-09-16 14:01:07,074 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:07,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:07,075 INFO L82 PathProgramCache]: Analyzing trace with hash 2121052950, now seen corresponding path program 181 times [2020-09-16 14:01:07,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:07,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339474167] [2020-09-16 14:01:07,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:07,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339474167] [2020-09-16 14:01:07,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130744744] [2020-09-16 14:01:07,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:07,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:07,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:07,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:07,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:07,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244237034] [2020-09-16 14:01:07,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:07,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:07,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:07,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:07,630 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-09-16 14:01:08,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:08,950 INFO L93 Difference]: Finished difference Result 268 states and 622 transitions. [2020-09-16 14:01:08,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:01:08,952 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:08,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:08,952 INFO L225 Difference]: With dead ends: 268 [2020-09-16 14:01:08,952 INFO L226 Difference]: Without dead ends: 266 [2020-09-16 14:01:08,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-09-16 14:01:08,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-09-16 14:01:08,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 167. [2020-09-16 14:01:08,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 14:01:08,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-16 14:01:08,956 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-16 14:01:08,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:08,956 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-16 14:01:08,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:08,956 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-16 14:01:08,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:08,957 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:08,957 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:09,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:09,158 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:09,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:09,158 INFO L82 PathProgramCache]: Analyzing trace with hash 2121053911, now seen corresponding path program 182 times [2020-09-16 14:01:09,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:09,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490013002] [2020-09-16 14:01:09,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:09,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490013002] [2020-09-16 14:01:09,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114900861] [2020-09-16 14:01:09,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:09,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:01:09,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:09,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:09,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:09,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:09,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:09,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974369331] [2020-09-16 14:01:09,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:09,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:09,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:09,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:09,695 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-16 14:01:11,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:11,017 INFO L93 Difference]: Finished difference Result 271 states and 630 transitions. [2020-09-16 14:01:11,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-16 14:01:11,019 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:11,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:11,020 INFO L225 Difference]: With dead ends: 271 [2020-09-16 14:01:11,020 INFO L226 Difference]: Without dead ends: 269 [2020-09-16 14:01:11,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-09-16 14:01:11,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-16 14:01:11,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-09-16 14:01:11,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-16 14:01:11,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-09-16 14:01:11,024 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-09-16 14:01:11,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:11,028 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-09-16 14:01:11,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:11,029 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-09-16 14:01:11,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:11,029 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:11,029 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:11,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-09-16 14:01:11,231 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:11,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:11,232 INFO L82 PathProgramCache]: Analyzing trace with hash 2121716040, now seen corresponding path program 183 times [2020-09-16 14:01:11,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:11,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315763229] [2020-09-16 14:01:11,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:11,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315763229] [2020-09-16 14:01:11,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406835501] [2020-09-16 14:01:11,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:11,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:01:11,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:11,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:11,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:11,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:11,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:11,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312011944] [2020-09-16 14:01:11,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:11,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:11,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:11,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:11,771 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-09-16 14:01:13,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:13,111 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2020-09-16 14:01:13,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:01:13,113 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:13,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:13,113 INFO L225 Difference]: With dead ends: 262 [2020-09-16 14:01:13,113 INFO L226 Difference]: Without dead ends: 260 [2020-09-16 14:01:13,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=408, Invalid=924, Unknown=0, NotChecked=0, Total=1332 [2020-09-16 14:01:13,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-16 14:01:13,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 171. [2020-09-16 14:01:13,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-16 14:01:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-16 14:01:13,117 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-16 14:01:13,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:13,117 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-16 14:01:13,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:13,117 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-16 14:01:13,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:13,118 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:13,118 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:13,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2020-09-16 14:01:13,319 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:13,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:13,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2121737399, now seen corresponding path program 184 times [2020-09-16 14:01:13,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:13,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959505446] [2020-09-16 14:01:13,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:13,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959505446] [2020-09-16 14:01:13,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677547991] [2020-09-16 14:01:13,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:13,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:01:13,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:13,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:13,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:13,869 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:01:13,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:13,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:13,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:13,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56683805] [2020-09-16 14:01:13,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:13,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:13,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:13,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:13,890 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-16 14:01:15,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:15,121 INFO L93 Difference]: Finished difference Result 248 states and 600 transitions. [2020-09-16 14:01:15,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:01:15,122 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:15,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:15,123 INFO L225 Difference]: With dead ends: 248 [2020-09-16 14:01:15,123 INFO L226 Difference]: Without dead ends: 243 [2020-09-16 14:01:15,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2020-09-16 14:01:15,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-16 14:01:15,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 171. [2020-09-16 14:01:15,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-16 14:01:15,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-16 14:01:15,134 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-16 14:01:15,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:15,134 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-16 14:01:15,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:15,135 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-16 14:01:15,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:15,135 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:15,135 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:15,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:15,336 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:15,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:15,337 INFO L82 PathProgramCache]: Analyzing trace with hash 2121738360, now seen corresponding path program 185 times [2020-09-16 14:01:15,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:15,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595344281] [2020-09-16 14:01:15,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:15,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595344281] [2020-09-16 14:01:15,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613882337] [2020-09-16 14:01:15,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:15,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:01:15,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:15,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:15,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:15,885 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:01:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:15,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:15,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:15,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490710052] [2020-09-16 14:01:15,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:15,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:15,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:15,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:15,944 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-16 14:01:17,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:17,720 INFO L93 Difference]: Finished difference Result 287 states and 694 transitions. [2020-09-16 14:01:17,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-16 14:01:17,722 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:17,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:17,722 INFO L225 Difference]: With dead ends: 287 [2020-09-16 14:01:17,722 INFO L226 Difference]: Without dead ends: 282 [2020-09-16 14:01:17,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=487, Invalid=1153, Unknown=0, NotChecked=0, Total=1640 [2020-09-16 14:01:17,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-16 14:01:17,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 169. [2020-09-16 14:01:17,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-16 14:01:17,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-09-16 14:01:17,726 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-09-16 14:01:17,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:17,726 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-09-16 14:01:17,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:17,726 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-09-16 14:01:17,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:17,727 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:17,727 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:17,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:17,928 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:17,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:17,928 INFO L82 PathProgramCache]: Analyzing trace with hash 2121745831, now seen corresponding path program 186 times [2020-09-16 14:01:17,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:17,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72658633] [2020-09-16 14:01:17,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:18,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72658633] [2020-09-16 14:01:18,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332050633] [2020-09-16 14:01:18,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:18,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 14:01:18,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:18,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:18,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:18,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:18,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:18,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751645116] [2020-09-16 14:01:18,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:18,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:18,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:18,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:18,649 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-09-16 14:01:20,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:20,268 INFO L93 Difference]: Finished difference Result 284 states and 678 transitions. [2020-09-16 14:01:20,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-16 14:01:20,270 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:20,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:20,271 INFO L225 Difference]: With dead ends: 284 [2020-09-16 14:01:20,271 INFO L226 Difference]: Without dead ends: 282 [2020-09-16 14:01:20,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2020-09-16 14:01:20,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-16 14:01:20,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 171. [2020-09-16 14:01:20,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-16 14:01:20,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-16 14:01:20,275 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-16 14:01:20,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:20,275 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-16 14:01:20,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:20,275 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-16 14:01:20,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:20,276 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:20,276 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:20,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:20,477 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:20,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:20,477 INFO L82 PathProgramCache]: Analyzing trace with hash 2121767190, now seen corresponding path program 187 times [2020-09-16 14:01:20,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:20,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174293055] [2020-09-16 14:01:20,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:20,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174293055] [2020-09-16 14:01:20,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53011577] [2020-09-16 14:01:20,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:20,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:20,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:21,096 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:01:21,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:21,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:21,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:21,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843875937] [2020-09-16 14:01:21,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:21,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:21,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:21,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:21,166 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-16 14:01:22,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:22,951 INFO L93 Difference]: Finished difference Result 289 states and 702 transitions. [2020-09-16 14:01:22,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-16 14:01:22,953 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:22,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:22,954 INFO L225 Difference]: With dead ends: 289 [2020-09-16 14:01:22,954 INFO L226 Difference]: Without dead ends: 284 [2020-09-16 14:01:22,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-09-16 14:01:22,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-16 14:01:22,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 172. [2020-09-16 14:01:22,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-16 14:01:22,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 436 transitions. [2020-09-16 14:01:22,958 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 436 transitions. Word has length 14 [2020-09-16 14:01:22,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:22,958 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 436 transitions. [2020-09-16 14:01:22,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 436 transitions. [2020-09-16 14:01:22,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:22,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:22,959 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:23,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:23,160 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:23,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:23,160 INFO L82 PathProgramCache]: Analyzing trace with hash 2121768151, now seen corresponding path program 188 times [2020-09-16 14:01:23,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:23,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987969870] [2020-09-16 14:01:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:23,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:23,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987969870] [2020-09-16 14:01:23,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183612067] [2020-09-16 14:01:23,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:23,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:01:23,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:23,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:23,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:23,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:01:23,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:23,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:23,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:23,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123058328] [2020-09-16 14:01:23,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:23,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:23,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:23,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:23,777 INFO L87 Difference]: Start difference. First operand 172 states and 436 transitions. Second operand 17 states. [2020-09-16 14:01:25,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:25,894 INFO L93 Difference]: Finished difference Result 312 states and 753 transitions. [2020-09-16 14:01:25,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-16 14:01:25,896 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:25,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:25,897 INFO L225 Difference]: With dead ends: 312 [2020-09-16 14:01:25,897 INFO L226 Difference]: Without dead ends: 304 [2020-09-16 14:01:25,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-09-16 14:01:25,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-16 14:01:25,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 165. [2020-09-16 14:01:25,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-16 14:01:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-09-16 14:01:25,901 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-09-16 14:01:25,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:25,901 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-09-16 14:01:25,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:25,901 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-09-16 14:01:25,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:25,902 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:25,902 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:26,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:26,103 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:26,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:26,103 INFO L82 PathProgramCache]: Analyzing trace with hash 2121976471, now seen corresponding path program 189 times [2020-09-16 14:01:26,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:26,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603377284] [2020-09-16 14:01:26,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:26,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603377284] [2020-09-16 14:01:26,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709890911] [2020-09-16 14:01:26,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:26,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:01:26,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:26,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:26,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:26,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:26,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:26,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880069829] [2020-09-16 14:01:26,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:26,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:26,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:26,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:26,700 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-09-16 14:01:27,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:27,938 INFO L93 Difference]: Finished difference Result 262 states and 617 transitions. [2020-09-16 14:01:27,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:01:27,940 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:27,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:27,940 INFO L225 Difference]: With dead ends: 262 [2020-09-16 14:01:27,940 INFO L226 Difference]: Without dead ends: 260 [2020-09-16 14:01:27,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-09-16 14:01:27,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-16 14:01:27,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 167. [2020-09-16 14:01:27,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 14:01:27,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-16 14:01:27,944 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-16 14:01:27,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:27,944 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-16 14:01:27,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:27,944 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-16 14:01:27,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:27,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:27,945 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:28,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-09-16 14:01:28,155 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:28,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:28,156 INFO L82 PathProgramCache]: Analyzing trace with hash 2122639561, now seen corresponding path program 190 times [2020-09-16 14:01:28,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:28,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735081567] [2020-09-16 14:01:28,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:28,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735081567] [2020-09-16 14:01:28,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110765058] [2020-09-16 14:01:28,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:28,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:01:28,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:28,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:28,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:28,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:28,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:28,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177578189] [2020-09-16 14:01:28,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:28,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:28,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:28,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:28,748 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-16 14:01:30,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:30,170 INFO L93 Difference]: Finished difference Result 271 states and 650 transitions. [2020-09-16 14:01:30,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:01:30,172 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:30,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:30,173 INFO L225 Difference]: With dead ends: 271 [2020-09-16 14:01:30,173 INFO L226 Difference]: Without dead ends: 269 [2020-09-16 14:01:30,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=396, Invalid=936, Unknown=0, NotChecked=0, Total=1332 [2020-09-16 14:01:30,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-16 14:01:30,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-09-16 14:01:30,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-16 14:01:30,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-16 14:01:30,177 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-16 14:01:30,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:30,177 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-16 14:01:30,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:30,177 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-16 14:01:30,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:30,178 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:30,178 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:30,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-09-16 14:01:30,379 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:30,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:30,380 INFO L82 PathProgramCache]: Analyzing trace with hash 2122660920, now seen corresponding path program 191 times [2020-09-16 14:01:30,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:30,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202648982] [2020-09-16 14:01:30,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:30,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202648982] [2020-09-16 14:01:30,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132958333] [2020-09-16 14:01:30,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:30,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:01:30,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:30,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:30,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:30,960 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:01:30,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:30,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:30,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:30,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851400523] [2020-09-16 14:01:30,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:30,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:30,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:30,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:30,986 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-16 14:01:32,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:32,754 INFO L93 Difference]: Finished difference Result 296 states and 714 transitions. [2020-09-16 14:01:32,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-16 14:01:32,755 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:32,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:32,756 INFO L225 Difference]: With dead ends: 296 [2020-09-16 14:01:32,756 INFO L226 Difference]: Without dead ends: 288 [2020-09-16 14:01:32,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-09-16 14:01:32,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-09-16 14:01:32,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 171. [2020-09-16 14:01:32,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-16 14:01:32,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-09-16 14:01:32,760 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-09-16 14:01:32,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:32,760 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-09-16 14:01:32,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:32,760 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-09-16 14:01:32,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:32,761 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:32,761 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:32,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-09-16 14:01:32,962 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:32,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:32,962 INFO L82 PathProgramCache]: Analyzing trace with hash 2122661881, now seen corresponding path program 192 times [2020-09-16 14:01:32,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:32,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652245282] [2020-09-16 14:01:32,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:33,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:33,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652245282] [2020-09-16 14:01:33,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470417266] [2020-09-16 14:01:33,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:33,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:01:33,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:33,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:33,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:33,458 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:01:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:33,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:33,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:33,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637274633] [2020-09-16 14:01:33,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:33,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:33,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:33,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:33,477 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-09-16 14:01:35,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:35,258 INFO L93 Difference]: Finished difference Result 298 states and 732 transitions. [2020-09-16 14:01:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-16 14:01:35,260 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:35,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:35,261 INFO L225 Difference]: With dead ends: 298 [2020-09-16 14:01:35,261 INFO L226 Difference]: Without dead ends: 290 [2020-09-16 14:01:35,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-09-16 14:01:35,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-16 14:01:35,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-09-16 14:01:35,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-16 14:01:35,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 429 transitions. [2020-09-16 14:01:35,265 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 429 transitions. Word has length 14 [2020-09-16 14:01:35,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:35,266 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 429 transitions. [2020-09-16 14:01:35,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:35,266 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 429 transitions. [2020-09-16 14:01:35,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:35,266 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:35,266 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:35,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-09-16 14:01:35,467 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:35,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:35,468 INFO L82 PathProgramCache]: Analyzing trace with hash 2122690711, now seen corresponding path program 193 times [2020-09-16 14:01:35,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:35,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628775375] [2020-09-16 14:01:35,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:35,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628775375] [2020-09-16 14:01:35,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747273173] [2020-09-16 14:01:35,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:35,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:35,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:36,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:01:36,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:36,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:36,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:36,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026529414] [2020-09-16 14:01:36,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:36,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:36,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:36,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:36,035 INFO L87 Difference]: Start difference. First operand 169 states and 429 transitions. Second operand 17 states. [2020-09-16 14:01:37,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:37,917 INFO L93 Difference]: Finished difference Result 291 states and 709 transitions. [2020-09-16 14:01:37,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-16 14:01:37,919 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:37,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:37,920 INFO L225 Difference]: With dead ends: 291 [2020-09-16 14:01:37,920 INFO L226 Difference]: Without dead ends: 283 [2020-09-16 14:01:37,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-09-16 14:01:37,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-09-16 14:01:37,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 167. [2020-09-16 14:01:37,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 14:01:37,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-16 14:01:37,924 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-16 14:01:37,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:37,924 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-16 14:01:37,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:37,930 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-16 14:01:37,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:37,931 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:37,931 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:38,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2020-09-16 14:01:38,132 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:38,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:38,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2145285195, now seen corresponding path program 194 times [2020-09-16 14:01:38,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:38,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495583860] [2020-09-16 14:01:38,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:38,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495583860] [2020-09-16 14:01:38,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34656954] [2020-09-16 14:01:38,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:38,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:01:38,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:38,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:38,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:38,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:38,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:38,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789555285] [2020-09-16 14:01:38,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:38,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:38,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:38,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:38,801 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-16 14:01:40,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:40,381 INFO L93 Difference]: Finished difference Result 265 states and 622 transitions. [2020-09-16 14:01:40,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:01:40,384 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:40,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:40,384 INFO L225 Difference]: With dead ends: 265 [2020-09-16 14:01:40,385 INFO L226 Difference]: Without dead ends: 263 [2020-09-16 14:01:40,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-09-16 14:01:40,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-09-16 14:01:40,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 167. [2020-09-16 14:01:40,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 14:01:40,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-16 14:01:40,388 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-16 14:01:40,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:40,388 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-16 14:01:40,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:40,388 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-16 14:01:40,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:40,389 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:40,389 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:40,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:40,590 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:40,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:40,590 INFO L82 PathProgramCache]: Analyzing trace with hash -2144622105, now seen corresponding path program 195 times [2020-09-16 14:01:40,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:40,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200080046] [2020-09-16 14:01:40,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:40,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200080046] [2020-09-16 14:01:40,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425918075] [2020-09-16 14:01:40,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:40,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:01:40,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:40,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:40,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:41,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:41,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:41,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023868352] [2020-09-16 14:01:41,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:41,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:41,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:41,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:41,266 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-16 14:01:43,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:43,104 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2020-09-16 14:01:43,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-16 14:01:43,106 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:43,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:43,107 INFO L225 Difference]: With dead ends: 262 [2020-09-16 14:01:43,107 INFO L226 Difference]: Without dead ends: 260 [2020-09-16 14:01:43,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-09-16 14:01:43,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-16 14:01:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2020-09-16 14:01:43,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-16 14:01:43,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-16 14:01:43,111 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-16 14:01:43,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:43,112 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-16 14:01:43,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:43,112 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-16 14:01:43,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:43,112 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:43,112 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:43,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2020-09-16 14:01:43,313 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:43,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:43,314 INFO L82 PathProgramCache]: Analyzing trace with hash -2144599785, now seen corresponding path program 196 times [2020-09-16 14:01:43,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:43,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462402804] [2020-09-16 14:01:43,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:43,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462402804] [2020-09-16 14:01:43,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739727867] [2020-09-16 14:01:43,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:43,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:01:43,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:43,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:43,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:43,931 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:01:43,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:43,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:43,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:43,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74005755] [2020-09-16 14:01:43,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:43,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:43,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:43,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:43,998 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-16 14:01:46,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:46,689 INFO L93 Difference]: Finished difference Result 285 states and 688 transitions. [2020-09-16 14:01:46,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-16 14:01:46,691 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:46,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:46,692 INFO L225 Difference]: With dead ends: 285 [2020-09-16 14:01:46,693 INFO L226 Difference]: Without dead ends: 280 [2020-09-16 14:01:46,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-09-16 14:01:46,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-16 14:01:46,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 167. [2020-09-16 14:01:46,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 14:01:46,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-16 14:01:46,697 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-16 14:01:46,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:46,698 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-16 14:01:46,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:46,698 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-16 14:01:46,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:46,698 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:46,698 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:46,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:46,899 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:46,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:46,900 INFO L82 PathProgramCache]: Analyzing trace with hash -2144570955, now seen corresponding path program 197 times [2020-09-16 14:01:46,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:46,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914898827] [2020-09-16 14:01:46,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:47,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914898827] [2020-09-16 14:01:47,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624650184] [2020-09-16 14:01:47,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:47,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:01:47,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:47,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:47,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:51,681 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:01:55,821 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-09-16 14:01:55,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:55,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:55,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-16 14:01:55,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300900606] [2020-09-16 14:01:55,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-16 14:01:55,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:55,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-16 14:01:55,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=220, Unknown=3, NotChecked=0, Total=306 [2020-09-16 14:01:55,825 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 18 states. [2020-09-16 14:02:00,076 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-09-16 14:02:04,884 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-09-16 14:02:05,250 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 23 [2020-09-16 14:02:08,092 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2020-09-16 14:02:10,330 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 32 [2020-09-16 14:02:37,796 WARN L193 SmtUtils]: Spent 4.31 s on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2020-09-16 14:02:46,297 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-09-16 14:03:33,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:33,453 INFO L93 Difference]: Finished difference Result 302 states and 718 transitions. [2020-09-16 14:03:33,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-16 14:03:33,455 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-09-16 14:03:33,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:33,456 INFO L225 Difference]: With dead ends: 302 [2020-09-16 14:03:33,456 INFO L226 Difference]: Without dead ends: 297 [2020-09-16 14:03:33,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 67.1s TimeCoverageRelationStatistics Valid=555, Invalid=1408, Unknown=17, NotChecked=0, Total=1980 [2020-09-16 14:03:33,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-09-16 14:03:33,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 166. [2020-09-16 14:03:33,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 14:03:33,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 414 transitions. [2020-09-16 14:03:33,460 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 414 transitions. Word has length 14 [2020-09-16 14:03:33,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:33,460 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 414 transitions. [2020-09-16 14:03:33,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-16 14:03:33,460 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 414 transitions. [2020-09-16 14:03:33,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:33,460 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:33,460 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:33,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:33,661 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:33,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:33,662 INFO L82 PathProgramCache]: Analyzing trace with hash -2143668793, now seen corresponding path program 198 times [2020-09-16 14:03:33,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:33,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548627409] [2020-09-16 14:03:33,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:33,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:33,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548627409] [2020-09-16 14:03:33,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006240999] [2020-09-16 14:03:33,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:33,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:03:33,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:33,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:33,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:34,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:34,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:34,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146675675] [2020-09-16 14:03:34,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:34,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:34,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:34,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:34,260 INFO L87 Difference]: Start difference. First operand 166 states and 414 transitions. Second operand 17 states. [2020-09-16 14:03:35,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:35,008 INFO L93 Difference]: Finished difference Result 219 states and 516 transitions. [2020-09-16 14:03:35,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:03:35,010 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:35,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:35,011 INFO L225 Difference]: With dead ends: 219 [2020-09-16 14:03:35,011 INFO L226 Difference]: Without dead ends: 217 [2020-09-16 14:03:35,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:03:35,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-16 14:03:35,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2020-09-16 14:03:35,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 14:03:35,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-16 14:03:35,015 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-16 14:03:35,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:35,015 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-16 14:03:35,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:35,016 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-16 14:03:35,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:35,016 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:35,016 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:35,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:35,217 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:35,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:35,218 INFO L82 PathProgramCache]: Analyzing trace with hash -2143646473, now seen corresponding path program 199 times [2020-09-16 14:03:35,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:35,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816542867] [2020-09-16 14:03:35,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:35,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816542867] [2020-09-16 14:03:35,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049688952] [2020-09-16 14:03:35,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:35,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:35,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:35,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:03:35,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:35,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:35,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:35,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825200808] [2020-09-16 14:03:35,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:35,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:35,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:35,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:35,807 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-16 14:03:36,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:36,777 INFO L93 Difference]: Finished difference Result 229 states and 538 transitions. [2020-09-16 14:03:36,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:03:36,780 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:36,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:36,781 INFO L225 Difference]: With dead ends: 229 [2020-09-16 14:03:36,781 INFO L226 Difference]: Without dead ends: 224 [2020-09-16 14:03:36,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-09-16 14:03:36,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-16 14:03:36,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 158. [2020-09-16 14:03:36,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-16 14:03:36,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 386 transitions. [2020-09-16 14:03:36,785 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 386 transitions. Word has length 14 [2020-09-16 14:03:36,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:36,785 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 386 transitions. [2020-09-16 14:03:36,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:36,785 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 386 transitions. [2020-09-16 14:03:36,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:36,786 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:36,786 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:36,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-09-16 14:03:36,987 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:36,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:36,987 INFO L82 PathProgramCache]: Analyzing trace with hash -255670682, now seen corresponding path program 200 times [2020-09-16 14:03:36,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:36,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297802937] [2020-09-16 14:03:36,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:37,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297802937] [2020-09-16 14:03:37,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902894439] [2020-09-16 14:03:37,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:37,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:03:37,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:37,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:37,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:37,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:37,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:37,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151034212] [2020-09-16 14:03:37,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:37,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:37,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:37,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:37,573 INFO L87 Difference]: Start difference. First operand 158 states and 386 transitions. Second operand 17 states. [2020-09-16 14:03:38,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:38,271 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-09-16 14:03:38,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:03:38,274 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:38,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:38,274 INFO L225 Difference]: With dead ends: 229 [2020-09-16 14:03:38,274 INFO L226 Difference]: Without dead ends: 227 [2020-09-16 14:03:38,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:03:38,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-16 14:03:38,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-09-16 14:03:38,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-16 14:03:38,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-09-16 14:03:38,278 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-09-16 14:03:38,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:38,278 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-09-16 14:03:38,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:38,278 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-09-16 14:03:38,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:38,279 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:38,279 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:38,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-09-16 14:03:38,480 INFO L427 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:38,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:38,480 INFO L82 PathProgramCache]: Analyzing trace with hash -255669721, now seen corresponding path program 201 times [2020-09-16 14:03:38,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:38,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237666405] [2020-09-16 14:03:38,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:38,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:38,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237666405] [2020-09-16 14:03:38,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153402674] [2020-09-16 14:03:38,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:38,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:03:38,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:38,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:38,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:39,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:39,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:39,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601414677] [2020-09-16 14:03:39,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:39,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:39,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:39,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:39,188 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-09-16 14:03:39,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:39,940 INFO L93 Difference]: Finished difference Result 237 states and 545 transitions. [2020-09-16 14:03:39,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:03:39,942 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:39,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:39,943 INFO L225 Difference]: With dead ends: 237 [2020-09-16 14:03:39,943 INFO L226 Difference]: Without dead ends: 235 [2020-09-16 14:03:39,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2020-09-16 14:03:39,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-09-16 14:03:39,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 160. [2020-09-16 14:03:39,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-16 14:03:39,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 392 transitions. [2020-09-16 14:03:39,946 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 392 transitions. Word has length 14 [2020-09-16 14:03:39,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:39,947 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 392 transitions. [2020-09-16 14:03:39,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:39,947 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 392 transitions. [2020-09-16 14:03:39,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:39,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:39,947 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:40,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-09-16 14:03:40,152 INFO L427 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:40,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:40,152 INFO L82 PathProgramCache]: Analyzing trace with hash -255640891, now seen corresponding path program 202 times [2020-09-16 14:03:40,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:40,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891788723] [2020-09-16 14:03:40,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:40,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:40,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891788723] [2020-09-16 14:03:40,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535733770] [2020-09-16 14:03:40,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:40,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:03:40,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:40,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:40,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:42,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:42,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:42,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022652007] [2020-09-16 14:03:42,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:42,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:42,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:42,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:42,712 INFO L87 Difference]: Start difference. First operand 160 states and 392 transitions. Second operand 17 states. [2020-09-16 14:03:43,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:43,914 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-09-16 14:03:43,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 14:03:43,917 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:43,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:43,918 INFO L225 Difference]: With dead ends: 246 [2020-09-16 14:03:43,918 INFO L226 Difference]: Without dead ends: 244 [2020-09-16 14:03:43,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-09-16 14:03:43,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-16 14:03:43,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 164. [2020-09-16 14:03:43,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 14:03:43,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 403 transitions. [2020-09-16 14:03:43,923 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 403 transitions. Word has length 14 [2020-09-16 14:03:43,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:43,923 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 403 transitions. [2020-09-16 14:03:43,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:43,924 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 403 transitions. [2020-09-16 14:03:43,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:43,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:43,924 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:44,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-09-16 14:03:44,131 INFO L427 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:44,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:44,132 INFO L82 PathProgramCache]: Analyzing trace with hash -254746200, now seen corresponding path program 203 times [2020-09-16 14:03:44,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:44,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073002131] [2020-09-16 14:03:44,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:44,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073002131] [2020-09-16 14:03:44,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824947514] [2020-09-16 14:03:44,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:44,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:03:44,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:44,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:44,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:44,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:44,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:44,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435338] [2020-09-16 14:03:44,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:44,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:44,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:44,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:44,866 INFO L87 Difference]: Start difference. First operand 164 states and 403 transitions. Second operand 17 states. [2020-09-16 14:03:45,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:45,650 INFO L93 Difference]: Finished difference Result 245 states and 560 transitions. [2020-09-16 14:03:45,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:03:45,653 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:45,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:45,654 INFO L225 Difference]: With dead ends: 245 [2020-09-16 14:03:45,654 INFO L226 Difference]: Without dead ends: 243 [2020-09-16 14:03:45,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:03:45,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-16 14:03:45,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 163. [2020-09-16 14:03:45,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 14:03:45,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 399 transitions. [2020-09-16 14:03:45,658 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 399 transitions. Word has length 14 [2020-09-16 14:03:45,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:45,658 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 399 transitions. [2020-09-16 14:03:45,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:45,659 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 399 transitions. [2020-09-16 14:03:45,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:45,659 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:45,659 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:45,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-09-16 14:03:45,860 INFO L427 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:45,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:45,861 INFO L82 PathProgramCache]: Analyzing trace with hash -227041531, now seen corresponding path program 204 times [2020-09-16 14:03:45,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:45,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266115341] [2020-09-16 14:03:45,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:46,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:46,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266115341] [2020-09-16 14:03:46,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582362526] [2020-09-16 14:03:46,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:46,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:03:46,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:46,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:46,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:46,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:46,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:46,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:46,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636333328] [2020-09-16 14:03:46,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:46,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:46,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:46,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:46,570 INFO L87 Difference]: Start difference. First operand 163 states and 399 transitions. Second operand 17 states. [2020-09-16 14:03:47,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:47,349 INFO L93 Difference]: Finished difference Result 239 states and 549 transitions. [2020-09-16 14:03:47,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:03:47,351 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:47,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:47,352 INFO L225 Difference]: With dead ends: 239 [2020-09-16 14:03:47,352 INFO L226 Difference]: Without dead ends: 237 [2020-09-16 14:03:47,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:03:47,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-16 14:03:47,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 162. [2020-09-16 14:03:47,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-16 14:03:47,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 396 transitions. [2020-09-16 14:03:47,356 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 396 transitions. Word has length 14 [2020-09-16 14:03:47,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:47,356 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 396 transitions. [2020-09-16 14:03:47,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:47,356 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 396 transitions. [2020-09-16 14:03:47,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:47,356 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:47,356 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:47,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-09-16 14:03:47,557 INFO L427 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:47,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:47,558 INFO L82 PathProgramCache]: Analyzing trace with hash -226088219, now seen corresponding path program 205 times [2020-09-16 14:03:47,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:47,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531386317] [2020-09-16 14:03:47,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:47,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531386317] [2020-09-16 14:03:47,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638770071] [2020-09-16 14:03:47,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:47,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:47,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:48,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:48,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:48,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371887407] [2020-09-16 14:03:48,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:48,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:48,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:48,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:48,389 INFO L87 Difference]: Start difference. First operand 162 states and 396 transitions. Second operand 17 states. [2020-09-16 14:03:48,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:48,987 INFO L93 Difference]: Finished difference Result 220 states and 508 transitions. [2020-09-16 14:03:48,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:03:48,989 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:48,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:48,990 INFO L225 Difference]: With dead ends: 220 [2020-09-16 14:03:48,990 INFO L226 Difference]: Without dead ends: 218 [2020-09-16 14:03:48,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:03:48,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-09-16 14:03:48,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 156. [2020-09-16 14:03:48,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-16 14:03:48,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2020-09-16 14:03:48,993 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 14 [2020-09-16 14:03:48,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:48,993 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2020-09-16 14:03:48,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:48,994 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2020-09-16 14:03:48,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:48,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:48,994 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:49,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-09-16 14:03:49,195 INFO L427 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:49,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:49,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392972, now seen corresponding path program 206 times [2020-09-16 14:03:49,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:49,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309261943] [2020-09-16 14:03:49,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:49,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309261943] [2020-09-16 14:03:49,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942148397] [2020-09-16 14:03:49,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:49,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:03:49,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:49,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:49,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:49,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:49,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:49,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193351873] [2020-09-16 14:03:49,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:49,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:49,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:49,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:49,941 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 17 states. [2020-09-16 14:03:50,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:50,782 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-09-16 14:03:50,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:03:50,784 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:50,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:50,785 INFO L225 Difference]: With dead ends: 229 [2020-09-16 14:03:50,785 INFO L226 Difference]: Without dead ends: 227 [2020-09-16 14:03:50,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-09-16 14:03:50,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-16 14:03:50,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-09-16 14:03:50,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-16 14:03:50,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 395 transitions. [2020-09-16 14:03:50,789 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 395 transitions. Word has length 14 [2020-09-16 14:03:50,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:50,789 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 395 transitions. [2020-09-16 14:03:50,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:50,789 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 395 transitions. [2020-09-16 14:03:50,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:50,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:50,790 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:50,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2020-09-16 14:03:50,991 INFO L427 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:50,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:50,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392011, now seen corresponding path program 207 times [2020-09-16 14:03:50,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:50,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403051025] [2020-09-16 14:03:50,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:51,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403051025] [2020-09-16 14:03:51,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137371745] [2020-09-16 14:03:51,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:51,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:03:51,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:51,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:51,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:51,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:51,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:51,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262523493] [2020-09-16 14:03:51,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:51,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:51,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:51,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:51,718 INFO L87 Difference]: Start difference. First operand 160 states and 395 transitions. Second operand 17 states. [2020-09-16 14:03:52,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:52,554 INFO L93 Difference]: Finished difference Result 233 states and 536 transitions. [2020-09-16 14:03:52,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:03:52,556 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:52,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:52,557 INFO L225 Difference]: With dead ends: 233 [2020-09-16 14:03:52,557 INFO L226 Difference]: Without dead ends: 231 [2020-09-16 14:03:52,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-09-16 14:03:52,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-16 14:03:52,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 159. [2020-09-16 14:03:52,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-16 14:03:52,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 392 transitions. [2020-09-16 14:03:52,561 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 392 transitions. Word has length 14 [2020-09-16 14:03:52,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:52,561 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 392 transitions. [2020-09-16 14:03:52,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:52,561 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 392 transitions. [2020-09-16 14:03:52,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:52,561 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:52,562 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:52,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:52,763 INFO L427 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:52,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:52,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1976363181, now seen corresponding path program 208 times [2020-09-16 14:03:52,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:52,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229684441] [2020-09-16 14:03:52,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:53,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:53,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229684441] [2020-09-16 14:03:53,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710822423] [2020-09-16 14:03:53,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:53,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:03:53,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:53,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:53,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:55,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:55,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:55,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590705354] [2020-09-16 14:03:55,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:55,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:55,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:55,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:55,578 INFO L87 Difference]: Start difference. First operand 159 states and 392 transitions. Second operand 17 states. [2020-09-16 14:03:56,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:56,794 INFO L93 Difference]: Finished difference Result 256 states and 582 transitions. [2020-09-16 14:03:56,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:03:56,797 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:56,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:56,797 INFO L225 Difference]: With dead ends: 256 [2020-09-16 14:03:56,797 INFO L226 Difference]: Without dead ends: 254 [2020-09-16 14:03:56,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-09-16 14:03:56,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-09-16 14:03:56,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 163. [2020-09-16 14:03:56,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 14:03:56,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 403 transitions. [2020-09-16 14:03:56,801 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 403 transitions. Word has length 14 [2020-09-16 14:03:56,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:56,802 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 403 transitions. [2020-09-16 14:03:56,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:56,802 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 403 transitions. [2020-09-16 14:03:56,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:56,802 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:56,802 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:57,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:57,003 INFO L427 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:57,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:57,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1975468490, now seen corresponding path program 209 times [2020-09-16 14:03:57,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:57,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595126591] [2020-09-16 14:03:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:57,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:57,253 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:57,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595126591] [2020-09-16 14:03:57,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758186212] [2020-09-16 14:03:57,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:57,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:03:57,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:57,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:57,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:57,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:57,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:57,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437462615] [2020-09-16 14:03:57,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:57,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:57,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:57,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:57,765 INFO L87 Difference]: Start difference. First operand 163 states and 403 transitions. Second operand 17 states. [2020-09-16 14:03:58,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:58,997 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-09-16 14:03:58,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:03:59,000 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:59,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:59,001 INFO L225 Difference]: With dead ends: 246 [2020-09-16 14:03:59,001 INFO L226 Difference]: Without dead ends: 244 [2020-09-16 14:03:59,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-09-16 14:03:59,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-16 14:03:59,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 162. [2020-09-16 14:03:59,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-16 14:03:59,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-09-16 14:03:59,004 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 14 [2020-09-16 14:03:59,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:59,004 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-09-16 14:03:59,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:59,005 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-09-16 14:03:59,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:59,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:59,005 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:59,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:59,206 INFO L427 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:59,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:59,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1339163482, now seen corresponding path program 210 times [2020-09-16 14:03:59,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:59,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52403280] [2020-09-16 14:03:59,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:59,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52403280] [2020-09-16 14:03:59,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812095393] [2020-09-16 14:03:59,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:59,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-16 14:03:59,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:59,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:59,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:59,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:59,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:59,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:59,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273534701] [2020-09-16 14:03:59,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:59,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:59,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:59,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:59,969 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 17 states. [2020-09-16 14:04:01,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:01,066 INFO L93 Difference]: Finished difference Result 250 states and 575 transitions. [2020-09-16 14:04:01,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:04:01,068 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:01,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:01,069 INFO L225 Difference]: With dead ends: 250 [2020-09-16 14:04:01,069 INFO L226 Difference]: Without dead ends: 248 [2020-09-16 14:04:01,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-09-16 14:04:01,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-09-16 14:04:01,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 164. [2020-09-16 14:04:01,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 14:04:01,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-09-16 14:04:01,072 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-09-16 14:04:01,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:01,073 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-09-16 14:04:01,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:01,073 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-09-16 14:04:01,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:01,073 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:01,073 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:01,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-09-16 14:04:01,274 INFO L427 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:01,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:01,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1339162521, now seen corresponding path program 211 times [2020-09-16 14:04:01,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:01,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517872152] [2020-09-16 14:04:01,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:01,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517872152] [2020-09-16 14:04:01,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492003823] [2020-09-16 14:04:01,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:01,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:01,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:02,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:02,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:02,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096430265] [2020-09-16 14:04:02,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:02,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:02,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:02,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:02,050 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-09-16 14:04:03,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:03,123 INFO L93 Difference]: Finished difference Result 245 states and 564 transitions. [2020-09-16 14:04:03,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 14:04:03,125 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:03,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:03,126 INFO L225 Difference]: With dead ends: 245 [2020-09-16 14:04:03,126 INFO L226 Difference]: Without dead ends: 243 [2020-09-16 14:04:03,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-09-16 14:04:03,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-16 14:04:03,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 164. [2020-09-16 14:04:03,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 14:04:03,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-09-16 14:04:03,130 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-09-16 14:04:03,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:03,130 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-09-16 14:04:03,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:03,130 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-09-16 14:04:03,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:03,130 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:03,131 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:03,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:03,332 INFO L427 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:03,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:03,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1339133691, now seen corresponding path program 212 times [2020-09-16 14:04:03,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:03,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115316294] [2020-09-16 14:04:03,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:03,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115316294] [2020-09-16 14:04:03,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294698799] [2020-09-16 14:04:03,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:03,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:04:03,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:04:03,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:03,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:04,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:04,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:04,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209509645] [2020-09-16 14:04:04,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:04,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:04,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:04,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:04,273 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-09-16 14:04:05,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:05,833 INFO L93 Difference]: Finished difference Result 262 states and 602 transitions. [2020-09-16 14:04:05,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:04:05,836 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:05,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:05,837 INFO L225 Difference]: With dead ends: 262 [2020-09-16 14:04:05,837 INFO L226 Difference]: Without dead ends: 260 [2020-09-16 14:04:05,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-09-16 14:04:05,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-16 14:04:05,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 165. [2020-09-16 14:04:05,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-16 14:04:05,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-09-16 14:04:05,841 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-09-16 14:04:05,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:05,841 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-09-16 14:04:05,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:05,841 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-09-16 14:04:05,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:05,841 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:05,842 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:06,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-09-16 14:04:06,043 INFO L427 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:06,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:06,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1318607692, now seen corresponding path program 213 times [2020-09-16 14:04:06,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:06,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425025443] [2020-09-16 14:04:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:06,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425025443] [2020-09-16 14:04:06,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258394390] [2020-09-16 14:04:06,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:06,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-16 14:04:06,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:04:06,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:06,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:06,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:06,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:06,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059597055] [2020-09-16 14:04:06,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:06,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:06,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:06,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:06,836 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-09-16 14:04:08,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:08,199 INFO L93 Difference]: Finished difference Result 254 states and 594 transitions. [2020-09-16 14:04:08,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 14:04:08,202 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:08,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:08,203 INFO L225 Difference]: With dead ends: 254 [2020-09-16 14:04:08,203 INFO L226 Difference]: Without dead ends: 252 [2020-09-16 14:04:08,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2020-09-16 14:04:08,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-09-16 14:04:08,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 166. [2020-09-16 14:04:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 14:04:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 416 transitions. [2020-09-16 14:04:08,207 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 416 transitions. Word has length 14 [2020-09-16 14:04:08,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:08,207 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 416 transitions. [2020-09-16 14:04:08,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:08,207 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 416 transitions. [2020-09-16 14:04:08,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:08,207 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:08,208 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:08,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-09-16 14:04:08,409 INFO L427 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:08,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:08,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1318606731, now seen corresponding path program 214 times [2020-09-16 14:04:08,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:08,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314072037] [2020-09-16 14:04:08,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:08,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314072037] [2020-09-16 14:04:08,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435503463] [2020-09-16 14:04:08,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:08,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:04:08,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:04:08,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:08,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:09,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:09,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:09,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:09,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339754337] [2020-09-16 14:04:09,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:09,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:09,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:09,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:09,343 INFO L87 Difference]: Start difference. First operand 166 states and 416 transitions. Second operand 17 states. [2020-09-16 14:04:10,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:10,679 INFO L93 Difference]: Finished difference Result 248 states and 576 transitions. [2020-09-16 14:04:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:04:10,682 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:10,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:10,683 INFO L225 Difference]: With dead ends: 248 [2020-09-16 14:04:10,683 INFO L226 Difference]: Without dead ends: 246 [2020-09-16 14:04:10,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2020-09-16 14:04:10,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-09-16 14:04:10,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 167. [2020-09-16 14:04:10,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 14:04:10,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-16 14:04:10,693 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-16 14:04:10,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:10,693 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-16 14:04:10,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:10,693 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-16 14:04:10,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:10,694 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:10,694 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:10,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:10,895 INFO L427 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:10,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:10,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1317944602, now seen corresponding path program 215 times [2020-09-16 14:04:10,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:10,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248824121] [2020-09-16 14:04:10,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:11,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248824121] [2020-09-16 14:04:11,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445248568] [2020-09-16 14:04:11,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:11,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-16 14:04:11,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:04:11,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:11,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:11,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:11,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:11,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:11,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323249085] [2020-09-16 14:04:11,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:11,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:11,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:11,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:11,625 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-16 14:04:13,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:13,095 INFO L93 Difference]: Finished difference Result 245 states and 579 transitions. [2020-09-16 14:04:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:04:13,098 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:13,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:13,098 INFO L225 Difference]: With dead ends: 245 [2020-09-16 14:04:13,099 INFO L226 Difference]: Without dead ends: 243 [2020-09-16 14:04:13,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=324, Invalid=798, Unknown=0, NotChecked=0, Total=1122 [2020-09-16 14:04:13,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-16 14:04:13,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 169. [2020-09-16 14:04:13,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-16 14:04:13,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-16 14:04:13,104 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-16 14:04:13,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:13,104 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-16 14:04:13,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:13,104 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-16 14:04:13,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:13,105 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:13,105 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:13,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:13,316 INFO L427 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:13,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:13,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1317923243, now seen corresponding path program 216 times [2020-09-16 14:04:13,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:13,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942448811] [2020-09-16 14:04:13,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:13,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942448811] [2020-09-16 14:04:13,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103519718] [2020-09-16 14:04:13,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:13,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:04:13,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:04:13,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:13,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:13,907 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:04:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:13,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:13,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:13,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237030328] [2020-09-16 14:04:13,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:13,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:13,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:13,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:13,935 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-16 14:04:14,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:14,738 INFO L93 Difference]: Finished difference Result 223 states and 540 transitions. [2020-09-16 14:04:14,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:04:14,740 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:14,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:14,741 INFO L225 Difference]: With dead ends: 223 [2020-09-16 14:04:14,741 INFO L226 Difference]: Without dead ends: 218 [2020-09-16 14:04:14,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-09-16 14:04:14,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-09-16 14:04:14,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 169. [2020-09-16 14:04:14,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-16 14:04:14,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-16 14:04:14,744 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-16 14:04:14,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:14,744 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-16 14:04:14,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:14,744 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-16 14:04:14,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:14,745 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:14,745 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:14,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-09-16 14:04:14,946 INFO L427 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:14,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:14,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1317922282, now seen corresponding path program 217 times [2020-09-16 14:04:14,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:14,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186013385] [2020-09-16 14:04:14,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:15,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186013385] [2020-09-16 14:04:15,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098833512] [2020-09-16 14:04:15,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:15,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:15,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:15,529 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:04:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:15,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:15,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:15,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722645391] [2020-09-16 14:04:15,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:15,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:15,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:15,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:15,629 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-16 14:04:17,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:17,348 INFO L93 Difference]: Finished difference Result 286 states and 679 transitions. [2020-09-16 14:04:17,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:04:17,350 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:17,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:17,351 INFO L225 Difference]: With dead ends: 286 [2020-09-16 14:04:17,351 INFO L226 Difference]: Without dead ends: 281 [2020-09-16 14:04:17,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-09-16 14:04:17,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-09-16 14:04:17,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 167. [2020-09-16 14:04:17,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 14:04:17,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-16 14:04:17,355 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-16 14:04:17,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:17,355 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-16 14:04:17,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:17,355 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-16 14:04:17,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:17,355 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:17,355 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:17,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:17,559 INFO L427 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:17,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:17,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1317914811, now seen corresponding path program 218 times [2020-09-16 14:04:17,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:17,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651868581] [2020-09-16 14:04:17,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:17,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651868581] [2020-09-16 14:04:17,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638168624] [2020-09-16 14:04:17,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:17,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:04:17,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:04:17,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:17,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:18,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:18,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:18,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109620051] [2020-09-16 14:04:18,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:18,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:18,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:18,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:18,230 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-16 14:04:19,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:19,591 INFO L93 Difference]: Finished difference Result 268 states and 630 transitions. [2020-09-16 14:04:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-16 14:04:19,593 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:19,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:19,594 INFO L225 Difference]: With dead ends: 268 [2020-09-16 14:04:19,594 INFO L226 Difference]: Without dead ends: 266 [2020-09-16 14:04:19,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2020-09-16 14:04:19,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-09-16 14:04:19,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 169. [2020-09-16 14:04:19,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-16 14:04:19,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-16 14:04:19,598 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-16 14:04:19,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:19,598 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-16 14:04:19,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:19,598 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-16 14:04:19,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:19,599 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:19,599 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:19,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2020-09-16 14:04:19,800 INFO L427 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:19,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:19,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1317893452, now seen corresponding path program 219 times [2020-09-16 14:04:19,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:19,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241685343] [2020-09-16 14:04:19,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:20,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241685343] [2020-09-16 14:04:20,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603960464] [2020-09-16 14:04:20,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:20,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:04:20,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:04:20,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:20,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:20,544 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:04:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:20,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:20,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:20,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922524006] [2020-09-16 14:04:20,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:20,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:20,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:20,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:20,652 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-16 14:04:22,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:22,966 INFO L93 Difference]: Finished difference Result 296 states and 707 transitions. [2020-09-16 14:04:22,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:04:22,969 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:22,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:22,970 INFO L225 Difference]: With dead ends: 296 [2020-09-16 14:04:22,970 INFO L226 Difference]: Without dead ends: 291 [2020-09-16 14:04:22,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=419, Invalid=987, Unknown=0, NotChecked=0, Total=1406 [2020-09-16 14:04:22,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-09-16 14:04:22,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 169. [2020-09-16 14:04:22,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-16 14:04:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-16 14:04:22,974 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-16 14:04:22,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:22,974 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-16 14:04:22,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:22,974 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-16 14:04:22,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:22,975 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:22,975 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:23,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:23,176 INFO L427 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:23,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:23,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1317892491, now seen corresponding path program 220 times [2020-09-16 14:04:23,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:23,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347922189] [2020-09-16 14:04:23,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:23,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:23,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347922189] [2020-09-16 14:04:23,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688374131] [2020-09-16 14:04:23,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:23,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:04:23,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:04:23,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:23,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:23,898 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:04:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:23,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:23,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:23,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996665929] [2020-09-16 14:04:23,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:23,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:23,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:23,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:23,944 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-16 14:04:26,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:26,202 INFO L93 Difference]: Finished difference Result 299 states and 710 transitions. [2020-09-16 14:04:26,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:04:26,205 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:26,206 INFO L225 Difference]: With dead ends: 299 [2020-09-16 14:04:26,206 INFO L226 Difference]: Without dead ends: 294 [2020-09-16 14:04:26,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=476, Invalid=1084, Unknown=0, NotChecked=0, Total=1560 [2020-09-16 14:04:26,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-09-16 14:04:26,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 165. [2020-09-16 14:04:26,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-16 14:04:26,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-09-16 14:04:26,210 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-09-16 14:04:26,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:26,210 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-09-16 14:04:26,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:26,210 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-09-16 14:04:26,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:26,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:26,211 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:26,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:26,412 INFO L427 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:26,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:26,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1317684171, now seen corresponding path program 221 times [2020-09-16 14:04:26,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:26,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691789921] [2020-09-16 14:04:26,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:26,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691789921] [2020-09-16 14:04:26,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347232216] [2020-09-16 14:04:26,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:26,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:04:26,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:04:26,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:26,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:27,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:27,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:27,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626145156] [2020-09-16 14:04:27,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:27,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:27,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:27,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:27,332 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-09-16 14:04:29,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:29,474 INFO L93 Difference]: Finished difference Result 274 states and 633 transitions. [2020-09-16 14:04:29,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:04:29,477 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:29,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:29,478 INFO L225 Difference]: With dead ends: 274 [2020-09-16 14:04:29,478 INFO L226 Difference]: Without dead ends: 272 [2020-09-16 14:04:29,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2020-09-16 14:04:29,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-09-16 14:04:29,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 169. [2020-09-16 14:04:29,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-16 14:04:29,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-16 14:04:29,483 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-16 14:04:29,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:29,484 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-16 14:04:29,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:29,484 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-16 14:04:29,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:29,484 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:29,485 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:29,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:29,697 INFO L427 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:29,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:29,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1317021081, now seen corresponding path program 222 times [2020-09-16 14:04:29,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:29,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893969333] [2020-09-16 14:04:29,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:29,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:29,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893969333] [2020-09-16 14:04:29,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95495475] [2020-09-16 14:04:29,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:30,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:04:30,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:04:30,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:30,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:30,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:30,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:30,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430676790] [2020-09-16 14:04:30,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:30,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:30,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:30,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:30,604 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-16 14:04:32,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:32,884 INFO L93 Difference]: Finished difference Result 282 states and 670 transitions. [2020-09-16 14:04:32,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:04:32,886 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:32,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:32,887 INFO L225 Difference]: With dead ends: 282 [2020-09-16 14:04:32,887 INFO L226 Difference]: Without dead ends: 280 [2020-09-16 14:04:32,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2020-09-16 14:04:32,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-16 14:04:32,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 174. [2020-09-16 14:04:32,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-16 14:04:32,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 442 transitions. [2020-09-16 14:04:32,891 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 442 transitions. Word has length 14 [2020-09-16 14:04:32,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:32,892 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 442 transitions. [2020-09-16 14:04:32,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:32,892 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 442 transitions. [2020-09-16 14:04:32,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:32,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:32,892 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:33,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-09-16 14:04:33,096 INFO L427 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:33,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:33,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1316999722, now seen corresponding path program 223 times [2020-09-16 14:04:33,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:33,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540368459] [2020-09-16 14:04:33,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:33,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540368459] [2020-09-16 14:04:33,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833808716] [2020-09-16 14:04:33,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:33,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:33,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:33,806 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:04:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:33,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:33,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:33,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400287603] [2020-09-16 14:04:33,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:33,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:33,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:33,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:33,916 INFO L87 Difference]: Start difference. First operand 174 states and 442 transitions. Second operand 17 states. [2020-09-16 14:04:36,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:36,701 INFO L93 Difference]: Finished difference Result 321 states and 773 transitions. [2020-09-16 14:04:36,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-16 14:04:36,706 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:36,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:36,707 INFO L225 Difference]: With dead ends: 321 [2020-09-16 14:04:36,707 INFO L226 Difference]: Without dead ends: 313 [2020-09-16 14:04:36,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=528, Invalid=1278, Unknown=0, NotChecked=0, Total=1806 [2020-09-16 14:04:36,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-09-16 14:04:36,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 176. [2020-09-16 14:04:36,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-16 14:04:36,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 452 transitions. [2020-09-16 14:04:36,711 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 452 transitions. Word has length 14 [2020-09-16 14:04:36,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:36,711 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 452 transitions. [2020-09-16 14:04:36,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:36,711 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 452 transitions. [2020-09-16 14:04:36,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:36,712 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:36,712 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:36,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-09-16 14:04:36,914 INFO L427 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:36,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:36,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1316998761, now seen corresponding path program 224 times [2020-09-16 14:04:36,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:36,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33099092] [2020-09-16 14:04:36,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:37,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:37,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33099092] [2020-09-16 14:04:37,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992483230] [2020-09-16 14:04:37,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:37,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:04:37,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:04:37,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:37,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:41,831 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:04:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:41,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:41,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:41,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223232900] [2020-09-16 14:04:41,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:41,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:41,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:41,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=190, Unknown=2, NotChecked=0, Total=272 [2020-09-16 14:04:41,923 INFO L87 Difference]: Start difference. First operand 176 states and 452 transitions. Second operand 17 states. [2020-09-16 14:04:46,990 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-09-16 14:04:51,227 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-09-16 14:04:55,621 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-09-16 14:04:59,982 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-09-16 14:05:02,095 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-09-16 14:05:08,820 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-09-16 14:05:09,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:09,896 INFO L93 Difference]: Finished difference Result 323 states and 782 transitions. [2020-09-16 14:05:09,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-16 14:05:09,898 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:05:09,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:09,899 INFO L225 Difference]: With dead ends: 323 [2020-09-16 14:05:09,899 INFO L226 Difference]: Without dead ends: 315 [2020-09-16 14:05:09,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=530, Invalid=1274, Unknown=2, NotChecked=0, Total=1806 [2020-09-16 14:05:09,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-09-16 14:05:09,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 171. [2020-09-16 14:05:09,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-16 14:05:09,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-09-16 14:05:09,903 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-09-16 14:05:09,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:09,903 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-09-16 14:05:09,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:05:09,903 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-09-16 14:05:09,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:09,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:09,904 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:10,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-09-16 14:05:10,105 INFO L427 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:10,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:10,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1316969931, now seen corresponding path program 225 times [2020-09-16 14:05:10,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:10,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527692750] [2020-09-16 14:05:10,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:10,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:10,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527692750] [2020-09-16 14:05:10,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702612195] [2020-09-16 14:05:10,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:10,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:05:10,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:10,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:05:10,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:10,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:05:10,914 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:05:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:10,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:10,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:05:10,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26393799] [2020-09-16 14:05:10,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:05:10,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:10,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:05:10,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:05:10,991 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-09-16 14:05:14,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:14,011 INFO L93 Difference]: Finished difference Result 320 states and 767 transitions. [2020-09-16 14:05:14,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-16 14:05:14,014 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:05:14,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:14,015 INFO L225 Difference]: With dead ends: 320 [2020-09-16 14:05:14,015 INFO L226 Difference]: Without dead ends: 312 [2020-09-16 14:05:14,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-09-16 14:05:14,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-09-16 14:05:14,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 170. [2020-09-16 14:05:14,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-16 14:05:14,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 431 transitions. [2020-09-16 14:05:14,019 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 431 transitions. Word has length 14 [2020-09-16 14:05:14,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:14,019 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 431 transitions. [2020-09-16 14:05:14,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:05:14,019 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 431 transitions. [2020-09-16 14:05:14,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:14,020 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:14,020 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:14,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-09-16 14:05:14,225 INFO L427 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:14,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:14,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1310533370, now seen corresponding path program 226 times [2020-09-16 14:05:14,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:14,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649506310] [2020-09-16 14:05:14,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:14,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649506310] [2020-09-16 14:05:14,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777975508] [2020-09-16 14:05:14,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:14,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:05:14,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:14,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:05:14,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:15,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:15,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:05:15,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206959976] [2020-09-16 14:05:15,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:05:15,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:15,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:05:15,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:05:15,043 INFO L87 Difference]: Start difference. First operand 170 states and 431 transitions. Second operand 17 states. [2020-09-16 14:05:16,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:16,254 INFO L93 Difference]: Finished difference Result 256 states and 599 transitions. [2020-09-16 14:05:16,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 14:05:16,256 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:05:16,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:16,257 INFO L225 Difference]: With dead ends: 256 [2020-09-16 14:05:16,257 INFO L226 Difference]: Without dead ends: 254 [2020-09-16 14:05:16,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-09-16 14:05:16,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-09-16 14:05:16,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 168. [2020-09-16 14:05:16,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-16 14:05:16,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 425 transitions. [2020-09-16 14:05:16,265 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 425 transitions. Word has length 14 [2020-09-16 14:05:16,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:16,266 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 425 transitions. [2020-09-16 14:05:16,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:05:16,266 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 425 transitions. [2020-09-16 14:05:16,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:16,266 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:16,267 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:16,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2020-09-16 14:05:16,468 INFO L427 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:16,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:16,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1289978541, now seen corresponding path program 227 times [2020-09-16 14:05:16,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:16,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771605441] [2020-09-16 14:05:16,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:16,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771605441] [2020-09-16 14:05:16,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469541205] [2020-09-16 14:05:16,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:16,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:05:16,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:16,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:05:16,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:17,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:17,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:05:17,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198438832] [2020-09-16 14:05:17,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:05:17,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:17,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:05:17,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:05:17,258 INFO L87 Difference]: Start difference. First operand 168 states and 425 transitions. Second operand 17 states. [2020-09-16 14:05:19,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:19,147 INFO L93 Difference]: Finished difference Result 294 states and 688 transitions. [2020-09-16 14:05:19,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-16 14:05:19,150 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:05:19,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:19,150 INFO L225 Difference]: With dead ends: 294 [2020-09-16 14:05:19,151 INFO L226 Difference]: Without dead ends: 292 [2020-09-16 14:05:19,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=389, Invalid=943, Unknown=0, NotChecked=0, Total=1332 [2020-09-16 14:05:19,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-09-16 14:05:19,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 166. [2020-09-16 14:05:19,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 14:05:19,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 423 transitions. [2020-09-16 14:05:19,154 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 423 transitions. Word has length 14 [2020-09-16 14:05:19,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:19,155 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 423 transitions. [2020-09-16 14:05:19,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:05:19,155 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 423 transitions. [2020-09-16 14:05:19,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:19,155 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:19,155 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:19,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:19,356 INFO L427 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:19,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:19,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1289977580, now seen corresponding path program 228 times [2020-09-16 14:05:19,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:19,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917227328] [2020-09-16 14:05:19,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:19,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917227328] [2020-09-16 14:05:19,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245961881] [2020-09-16 14:05:19,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:19,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:05:19,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:19,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:05:19,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:20,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:20,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:05:20,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048261050] [2020-09-16 14:05:20,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:05:20,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:20,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:05:20,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:05:20,146 INFO L87 Difference]: Start difference. First operand 166 states and 423 transitions. Second operand 17 states. [2020-09-16 14:05:21,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:21,708 INFO L93 Difference]: Finished difference Result 266 states and 625 transitions. [2020-09-16 14:05:21,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:05:21,710 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:05:21,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:21,711 INFO L225 Difference]: With dead ends: 266 [2020-09-16 14:05:21,711 INFO L226 Difference]: Without dead ends: 264 [2020-09-16 14:05:21,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=316, Invalid=806, Unknown=0, NotChecked=0, Total=1122 [2020-09-16 14:05:21,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-09-16 14:05:21,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 164. [2020-09-16 14:05:21,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 14:05:21,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-09-16 14:05:21,715 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-09-16 14:05:21,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:21,715 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-09-16 14:05:21,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:05:21,715 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-09-16 14:05:21,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:21,716 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:21,716 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:21,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:21,917 INFO L427 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:21,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:21,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1289315451, now seen corresponding path program 229 times [2020-09-16 14:05:21,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:21,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508711136] [2020-09-16 14:05:21,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:22,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508711136] [2020-09-16 14:05:22,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690437050] [2020-09-16 14:05:22,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:22,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:22,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:05:22,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:22,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:22,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:05:22,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988022157] [2020-09-16 14:05:22,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:05:22,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:22,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:05:22,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:05:22,710 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-09-16 14:05:24,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:24,727 INFO L93 Difference]: Finished difference Result 275 states and 656 transitions. [2020-09-16 14:05:24,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-16 14:05:24,731 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:05:24,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:24,732 INFO L225 Difference]: With dead ends: 275 [2020-09-16 14:05:24,732 INFO L226 Difference]: Without dead ends: 273 [2020-09-16 14:05:24,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2020-09-16 14:05:24,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-09-16 14:05:24,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 166. [2020-09-16 14:05:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 14:05:24,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-16 14:05:24,736 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-16 14:05:24,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:24,736 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-16 14:05:24,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:05:24,736 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-16 14:05:24,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:24,737 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:24,737 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:24,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:24,938 INFO L427 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:24,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:24,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1289294092, now seen corresponding path program 230 times [2020-09-16 14:05:24,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:24,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341985590] [2020-09-16 14:05:24,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:25,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341985590] [2020-09-16 14:05:25,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976547566] [2020-09-16 14:05:25,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:25,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:05:25,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:25,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:05:25,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:25,559 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:05:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:25,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:25,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:05:25,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844948785] [2020-09-16 14:05:25,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:05:25,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:25,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:05:25,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:05:25,588 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-16 14:05:27,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:27,392 INFO L93 Difference]: Finished difference Result 285 states and 690 transitions. [2020-09-16 14:05:27,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-16 14:05:27,394 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:05:27,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:27,395 INFO L225 Difference]: With dead ends: 285 [2020-09-16 14:05:27,395 INFO L226 Difference]: Without dead ends: 277 [2020-09-16 14:05:27,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=482, Invalid=1240, Unknown=0, NotChecked=0, Total=1722 [2020-09-16 14:05:27,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-09-16 14:05:27,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 166. [2020-09-16 14:05:27,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 14:05:27,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-16 14:05:27,399 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-16 14:05:27,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:27,399 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-16 14:05:27,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:05:27,399 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-16 14:05:27,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:27,399 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:27,400 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:27,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable263 [2020-09-16 14:05:27,601 INFO L427 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:27,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:27,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1289293131, now seen corresponding path program 231 times [2020-09-16 14:05:27,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:27,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773606542] [2020-09-16 14:05:27,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:27,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773606542] [2020-09-16 14:05:27,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052779618] [2020-09-16 14:05:27,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:27,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:05:27,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:27,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:05:27,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:28,252 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:05:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:28,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:28,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:05:28,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521241309] [2020-09-16 14:05:28,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:05:28,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:28,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:05:28,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:05:28,356 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-16 14:05:30,100 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-09-16 14:05:31,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:31,082 INFO L93 Difference]: Finished difference Result 307 states and 744 transitions. [2020-09-16 14:05:31,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-16 14:05:31,085 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:05:31,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:31,086 INFO L225 Difference]: With dead ends: 307 [2020-09-16 14:05:31,086 INFO L226 Difference]: Without dead ends: 299 [2020-09-16 14:05:31,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-09-16 14:05:31,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-09-16 14:05:31,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 164. [2020-09-16 14:05:31,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 14:05:31,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-09-16 14:05:31,090 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-09-16 14:05:31,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:31,090 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-09-16 14:05:31,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:05:31,090 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-09-16 14:05:31,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:31,091 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:31,091 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:31,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:31,292 INFO L427 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:31,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:31,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1289285660, now seen corresponding path program 232 times [2020-09-16 14:05:31,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:31,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254209620] [2020-09-16 14:05:31,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:31,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254209620] [2020-09-16 14:05:31,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100627978] [2020-09-16 14:05:31,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:31,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:05:31,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:31,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:05:31,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:32,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:32,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:05:32,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952212849] [2020-09-16 14:05:32,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:05:32,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:32,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:05:32,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:05:32,060 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-09-16 14:05:33,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:33,798 INFO L93 Difference]: Finished difference Result 280 states and 668 transitions. [2020-09-16 14:05:33,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-16 14:05:33,800 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:05:33,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:33,801 INFO L225 Difference]: With dead ends: 280 [2020-09-16 14:05:33,801 INFO L226 Difference]: Without dead ends: 278 [2020-09-16 14:05:33,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=412, Invalid=994, Unknown=0, NotChecked=0, Total=1406 [2020-09-16 14:05:33,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-09-16 14:05:33,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 166. [2020-09-16 14:05:33,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 14:05:33,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-16 14:05:33,805 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-16 14:05:33,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:33,805 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-16 14:05:33,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:05:33,806 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-16 14:05:33,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:33,806 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:33,806 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:34,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2020-09-16 14:05:34,007 INFO L427 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:34,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:34,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1289264301, now seen corresponding path program 233 times [2020-09-16 14:05:34,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:34,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970387988] [2020-09-16 14:05:34,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:34,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970387988] [2020-09-16 14:05:34,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879514533] [2020-09-16 14:05:34,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:34,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:05:34,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:34,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:05:34,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:34,652 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:05:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:34,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:34,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:05:34,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743877142] [2020-09-16 14:05:34,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:05:34,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:34,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:05:34,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:05:34,682 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-16 14:05:36,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:36,665 INFO L93 Difference]: Finished difference Result 315 states and 764 transitions. [2020-09-16 14:05:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-16 14:05:36,669 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:05:36,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:36,669 INFO L225 Difference]: With dead ends: 315 [2020-09-16 14:05:36,670 INFO L226 Difference]: Without dead ends: 307 [2020-09-16 14:05:36,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-09-16 14:05:36,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-09-16 14:05:36,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 164. [2020-09-16 14:05:36,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 14:05:36,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 414 transitions. [2020-09-16 14:05:36,674 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 414 transitions. Word has length 14 [2020-09-16 14:05:36,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:36,674 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 414 transitions. [2020-09-16 14:05:36,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:05:36,674 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 414 transitions. [2020-09-16 14:05:36,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:36,674 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:36,675 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:36,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:36,876 INFO L427 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:36,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:36,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1289263340, now seen corresponding path program 234 times [2020-09-16 14:05:36,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:36,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217419614] [2020-09-16 14:05:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:37,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:37,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217419614] [2020-09-16 14:05:37,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381401713] [2020-09-16 14:05:37,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:37,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:05:37,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:37,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:05:37,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:37,506 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:05:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:37,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:37,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:05:37,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644030670] [2020-09-16 14:05:37,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:05:37,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:37,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:05:37,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:05:37,537 INFO L87 Difference]: Start difference. First operand 164 states and 414 transitions. Second operand 17 states. [2020-09-16 14:05:39,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:39,851 INFO L93 Difference]: Finished difference Result 312 states and 754 transitions. [2020-09-16 14:05:39,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-16 14:05:39,855 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:05:39,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:39,856 INFO L225 Difference]: With dead ends: 312 [2020-09-16 14:05:39,856 INFO L226 Difference]: Without dead ends: 304 [2020-09-16 14:05:39,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-09-16 14:05:39,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-16 14:05:39,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 157. [2020-09-16 14:05:39,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-16 14:05:39,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 391 transitions. [2020-09-16 14:05:39,860 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 391 transitions. Word has length 14 [2020-09-16 14:05:39,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:39,860 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 391 transitions. [2020-09-16 14:05:39,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:05:39,860 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 391 transitions. [2020-09-16 14:05:39,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:39,861 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:39,861 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:40,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-09-16 14:05:40,062 INFO L427 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:40,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:40,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1288370571, now seen corresponding path program 235 times [2020-09-16 14:05:40,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:40,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147480667] [2020-09-16 14:05:40,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:40,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147480667] [2020-09-16 14:05:40,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495968445] [2020-09-16 14:05:40,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:40,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:05:40,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:40,796 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:05:40,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:40,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:40,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:05:40,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839633897] [2020-09-16 14:05:40,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:05:40,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:40,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:05:40,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:05:40,831 INFO L87 Difference]: Start difference. First operand 157 states and 391 transitions. Second operand 17 states. [2020-09-16 14:05:43,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:43,425 INFO L93 Difference]: Finished difference Result 307 states and 730 transitions. [2020-09-16 14:05:43,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-16 14:05:43,427 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:05:43,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:43,428 INFO L225 Difference]: With dead ends: 307 [2020-09-16 14:05:43,428 INFO L226 Difference]: Without dead ends: 299 [2020-09-16 14:05:43,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-09-16 14:05:43,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-09-16 14:05:43,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 155. [2020-09-16 14:05:43,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-16 14:05:43,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 381 transitions. [2020-09-16 14:05:43,431 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 381 transitions. Word has length 14 [2020-09-16 14:05:43,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:43,432 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 381 transitions. [2020-09-16 14:05:43,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:05:43,432 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 381 transitions. [2020-09-16 14:05:43,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:43,432 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:43,432 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:43,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:43,633 INFO L427 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:43,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:43,634 INFO L82 PathProgramCache]: Analyzing trace with hash -423000859, now seen corresponding path program 236 times [2020-09-16 14:05:43,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:43,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997094822] [2020-09-16 14:05:43,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:43,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997094822] [2020-09-16 14:05:43,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766106637] [2020-09-16 14:05:43,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:44,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:05:44,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:44,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:05:44,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:44,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:44,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:05:44,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732551762] [2020-09-16 14:05:44,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:05:44,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:44,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:05:44,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:05:44,489 INFO L87 Difference]: Start difference. First operand 155 states and 381 transitions. Second operand 17 states. [2020-09-16 14:05:45,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:45,357 INFO L93 Difference]: Finished difference Result 225 states and 519 transitions. [2020-09-16 14:05:45,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:05:45,361 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:05:45,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:45,362 INFO L225 Difference]: With dead ends: 225 [2020-09-16 14:05:45,362 INFO L226 Difference]: Without dead ends: 223 [2020-09-16 14:05:45,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:05:45,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-16 14:05:45,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 153. [2020-09-16 14:05:45,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-16 14:05:45,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 376 transitions. [2020-09-16 14:05:45,365 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 376 transitions. Word has length 14 [2020-09-16 14:05:45,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:45,365 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 376 transitions. [2020-09-16 14:05:45,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:05:45,366 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 376 transitions. [2020-09-16 14:05:45,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:45,366 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:45,371 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:45,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-09-16 14:05:45,572 INFO L427 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:45,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:45,573 INFO L82 PathProgramCache]: Analyzing trace with hash -401551339, now seen corresponding path program 237 times [2020-09-16 14:05:45,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:45,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561404437] [2020-09-16 14:05:45,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:45,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561404437] [2020-09-16 14:05:45,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924991471] [2020-09-16 14:05:45,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:45,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:05:45,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:45,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:05:45,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:46,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:46,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:05:46,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963987124] [2020-09-16 14:05:46,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:05:46,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:46,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:05:46,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:05:46,342 INFO L87 Difference]: Start difference. First operand 153 states and 376 transitions. Second operand 17 states. [2020-09-16 14:05:47,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:47,266 INFO L93 Difference]: Finished difference Result 223 states and 512 transitions. [2020-09-16 14:05:47,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:05:47,269 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:05:47,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:47,270 INFO L225 Difference]: With dead ends: 223 [2020-09-16 14:05:47,270 INFO L226 Difference]: Without dead ends: 221 [2020-09-16 14:05:47,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-09-16 14:05:47,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-16 14:05:47,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 151. [2020-09-16 14:05:47,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-16 14:05:47,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 371 transitions. [2020-09-16 14:05:47,273 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 371 transitions. Word has length 14 [2020-09-16 14:05:47,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:47,273 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 371 transitions. [2020-09-16 14:05:47,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:05:47,273 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 371 transitions. [2020-09-16 14:05:47,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:47,274 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:47,274 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:47,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2020-09-16 14:05:47,475 INFO L427 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:47,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:47,475 INFO L82 PathProgramCache]: Analyzing trace with hash -400888249, now seen corresponding path program 238 times [2020-09-16 14:05:47,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:47,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939289318] [2020-09-16 14:05:47,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:47,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:47,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939289318] [2020-09-16 14:05:47,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411461799] [2020-09-16 14:05:47,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:47,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:05:47,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:47,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:05:47,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:48,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:48,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:05:48,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435412045] [2020-09-16 14:05:48,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:05:48,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:48,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:05:48,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:05:48,328 INFO L87 Difference]: Start difference. First operand 151 states and 371 transitions. Second operand 17 states. [2020-09-16 14:05:49,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:49,334 INFO L93 Difference]: Finished difference Result 221 states and 510 transitions. [2020-09-16 14:05:49,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:05:49,343 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:05:49,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:49,343 INFO L225 Difference]: With dead ends: 221 [2020-09-16 14:05:49,343 INFO L226 Difference]: Without dead ends: 219 [2020-09-16 14:05:49,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=229, Invalid=527, Unknown=0, NotChecked=0, Total=756 [2020-09-16 14:05:49,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-16 14:05:49,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 152. [2020-09-16 14:05:49,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-16 14:05:49,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 373 transitions. [2020-09-16 14:05:49,346 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 373 transitions. Word has length 14 [2020-09-16 14:05:49,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:49,347 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 373 transitions. [2020-09-16 14:05:49,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:05:49,347 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 373 transitions. [2020-09-16 14:05:49,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:49,347 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:49,347 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:49,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:49,548 INFO L427 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:49,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:49,549 INFO L82 PathProgramCache]: Analyzing trace with hash -400865929, now seen corresponding path program 239 times [2020-09-16 14:05:49,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:49,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916167377] [2020-09-16 14:05:49,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:49,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916167377] [2020-09-16 14:05:49,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848830834] [2020-09-16 14:05:49,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:49,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:05:49,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:49,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:05:49,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:50,357 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:05:52,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:52,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:52,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-16 14:05:52,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637311170] [2020-09-16 14:05:52,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-16 14:05:52,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:52,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-16 14:05:52,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2020-09-16 14:05:52,531 INFO L87 Difference]: Start difference. First operand 152 states and 373 transitions. Second operand 18 states. [2020-09-16 14:05:53,090 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 18 [2020-09-16 14:06:12,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:06:12,772 INFO L93 Difference]: Finished difference Result 252 states and 586 transitions. [2020-09-16 14:06:12,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-16 14:06:12,782 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-09-16 14:06:12,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:06:12,783 INFO L225 Difference]: With dead ends: 252 [2020-09-16 14:06:12,783 INFO L226 Difference]: Without dead ends: 247 [2020-09-16 14:06:12,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=334, Invalid=720, Unknown=2, NotChecked=0, Total=1056 [2020-09-16 14:06:12,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-09-16 14:06:12,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 150. [2020-09-16 14:06:12,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-16 14:06:12,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 366 transitions. [2020-09-16 14:06:12,787 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 366 transitions. Word has length 14 [2020-09-16 14:06:12,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:06:12,787 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 366 transitions. [2020-09-16 14:06:12,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-16 14:06:12,787 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 366 transitions. [2020-09-16 14:06:12,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:06:12,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:06:12,788 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:06:12,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:12,989 INFO L427 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:06:12,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:06:12,989 INFO L82 PathProgramCache]: Analyzing trace with hash -400837099, now seen corresponding path program 240 times [2020-09-16 14:06:12,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:06:12,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809567848] [2020-09-16 14:06:12,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:06:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:13,301 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:13,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809567848] [2020-09-16 14:06:13,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284956430] [2020-09-16 14:06:13,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:13,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:06:13,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:06:13,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:06:13,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:06:13,824 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:06:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:13,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:06:13,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:06:13,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507448684] [2020-09-16 14:06:13,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:06:13,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:06:13,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:06:13,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:06:13,866 INFO L87 Difference]: Start difference. First operand 150 states and 366 transitions. Second operand 17 states. [2020-09-16 14:06:15,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:06:15,258 INFO L93 Difference]: Finished difference Result 225 states and 522 transitions. [2020-09-16 14:06:15,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:06:15,262 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:06:15,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:06:15,263 INFO L225 Difference]: With dead ends: 225 [2020-09-16 14:06:15,263 INFO L226 Difference]: Without dead ends: 220 [2020-09-16 14:06:15,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-16 14:06:15,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-16 14:06:15,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 146. [2020-09-16 14:06:15,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-16 14:06:15,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 342 transitions. [2020-09-16 14:06:15,267 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 342 transitions. Word has length 14 [2020-09-16 14:06:15,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:06:15,267 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 342 transitions. [2020-09-16 14:06:15,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:06:15,268 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 342 transitions. [2020-09-16 14:06:15,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:06:15,268 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:06:15,268 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:06:15,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:15,469 INFO L427 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:06:15,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:06:15,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1019616642, now seen corresponding path program 7 times [2020-09-16 14:06:15,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:06:15,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389551827] [2020-09-16 14:06:15,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:06:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:15,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389551827] [2020-09-16 14:06:15,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655263548] [2020-09-16 14:06:15,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:15,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:06:15,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:06:16,326 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:06:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:16,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:06:16,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-16 14:06:16,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853290946] [2020-09-16 14:06:16,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-16 14:06:16,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:06:16,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-16 14:06:16,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:06:16,449 INFO L87 Difference]: Start difference. First operand 146 states and 342 transitions. Second operand 20 states. [2020-09-16 14:06:17,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:06:17,103 INFO L93 Difference]: Finished difference Result 206 states and 480 transitions. [2020-09-16 14:06:17,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:06:17,106 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 14 [2020-09-16 14:06:17,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:06:17,107 INFO L225 Difference]: With dead ends: 206 [2020-09-16 14:06:17,107 INFO L226 Difference]: Without dead ends: 201 [2020-09-16 14:06:17,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-09-16 14:06:17,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-16 14:06:17,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2020-09-16 14:06:17,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-16 14:06:17,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 383 transitions. [2020-09-16 14:06:17,111 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 383 transitions. Word has length 14 [2020-09-16 14:06:17,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:06:17,111 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 383 transitions. [2020-09-16 14:06:17,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-16 14:06:17,111 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 383 transitions. [2020-09-16 14:06:17,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:06:17,112 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:06:17,112 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:06:17,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:17,313 INFO L427 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:06:17,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:06:17,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1046764459, now seen corresponding path program 28 times [2020-09-16 14:06:17,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:06:17,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276910318] [2020-09-16 14:06:17,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:06:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:17,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276910318] [2020-09-16 14:06:17,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218951899] [2020-09-16 14:06:17,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:17,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:06:17,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:06:17,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:06:17,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:06:18,533 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:18,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:06:18,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:06:18,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144164770] [2020-09-16 14:06:18,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:06:18,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:06:18,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:06:18,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:06:18,535 INFO L87 Difference]: Start difference. First operand 156 states and 383 transitions. Second operand 19 states. [2020-09-16 14:06:18,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:06:18,722 INFO L93 Difference]: Finished difference Result 204 states and 479 transitions. [2020-09-16 14:06:18,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 14:06:18,725 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-16 14:06:18,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:06:18,725 INFO L225 Difference]: With dead ends: 204 [2020-09-16 14:06:18,725 INFO L226 Difference]: Without dead ends: 201 [2020-09-16 14:06:18,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:06:18,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-16 14:06:18,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 167. [2020-09-16 14:06:18,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 14:06:18,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 409 transitions. [2020-09-16 14:06:18,729 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 409 transitions. Word has length 14 [2020-09-16 14:06:18,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:06:18,729 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 409 transitions. [2020-09-16 14:06:18,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:06:18,729 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 409 transitions. [2020-09-16 14:06:18,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:06:18,730 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:06:18,730 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:06:18,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2020-09-16 14:06:18,931 INFO L427 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:06:18,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:06:18,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1739755227, now seen corresponding path program 29 times [2020-09-16 14:06:18,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:06:18,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972294932] [2020-09-16 14:06:18,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:06:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:19,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972294932] [2020-09-16 14:06:19,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364895543] [2020-09-16 14:06:19,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:19,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-16 14:06:19,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:06:19,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:06:19,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:06:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:20,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:06:20,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:06:20,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406138207] [2020-09-16 14:06:20,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:06:20,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:06:20,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:06:20,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:06:20,097 INFO L87 Difference]: Start difference. First operand 167 states and 409 transitions. Second operand 19 states. [2020-09-16 14:06:20,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:06:20,320 INFO L93 Difference]: Finished difference Result 224 states and 518 transitions. [2020-09-16 14:06:20,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 14:06:20,324 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-16 14:06:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:06:20,325 INFO L225 Difference]: With dead ends: 224 [2020-09-16 14:06:20,325 INFO L226 Difference]: Without dead ends: 221 [2020-09-16 14:06:20,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:06:20,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-16 14:06:20,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 167. [2020-09-16 14:06:20,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 14:06:20,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 409 transitions. [2020-09-16 14:06:20,329 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 409 transitions. Word has length 14 [2020-09-16 14:06:20,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:06:20,329 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 409 transitions. [2020-09-16 14:06:20,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:06:20,329 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 409 transitions. [2020-09-16 14:06:20,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:06:20,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:06:20,330 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:06:20,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:20,540 INFO L427 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:06:20,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:06:20,540 INFO L82 PathProgramCache]: Analyzing trace with hash 792278443, now seen corresponding path program 30 times [2020-09-16 14:06:20,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:06:20,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247849105] [2020-09-16 14:06:20,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:06:20,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:21,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247849105] [2020-09-16 14:06:21,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137847801] [2020-09-16 14:06:21,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:21,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-16 14:06:21,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:06:21,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:06:21,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:06:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:21,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:06:21,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:06:21,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045176307] [2020-09-16 14:06:21,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:06:21,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:06:21,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:06:21,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:06:21,667 INFO L87 Difference]: Start difference. First operand 167 states and 409 transitions. Second operand 19 states. [2020-09-16 14:06:22,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:06:22,004 INFO L93 Difference]: Finished difference Result 223 states and 518 transitions. [2020-09-16 14:06:22,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 14:06:22,008 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-16 14:06:22,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:06:22,009 INFO L225 Difference]: With dead ends: 223 [2020-09-16 14:06:22,010 INFO L226 Difference]: Without dead ends: 220 [2020-09-16 14:06:22,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:06:22,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-16 14:06:22,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 168. [2020-09-16 14:06:22,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-16 14:06:22,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 414 transitions. [2020-09-16 14:06:22,014 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 414 transitions. Word has length 14 [2020-09-16 14:06:22,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:06:22,014 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 414 transitions. [2020-09-16 14:06:22,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:06:22,014 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 414 transitions. [2020-09-16 14:06:22,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:06:22,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:06:22,015 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:06:22,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-09-16 14:06:22,216 INFO L427 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:06:22,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:06:22,216 INFO L82 PathProgramCache]: Analyzing trace with hash -69569317, now seen corresponding path program 31 times [2020-09-16 14:06:22,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:06:22,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789030039] [2020-09-16 14:06:22,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:06:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:22,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789030039] [2020-09-16 14:06:22,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912347943] [2020-09-16 14:06:22,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:22,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:06:22,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:06:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:23,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:06:23,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:06:23,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664300506] [2020-09-16 14:06:23,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:06:23,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:06:23,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:06:23,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:06:23,219 INFO L87 Difference]: Start difference. First operand 168 states and 414 transitions. Second operand 19 states. [2020-09-16 14:06:23,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:06:23,617 INFO L93 Difference]: Finished difference Result 222 states and 518 transitions. [2020-09-16 14:06:23,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 14:06:23,621 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-16 14:06:23,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:06:23,622 INFO L225 Difference]: With dead ends: 222 [2020-09-16 14:06:23,623 INFO L226 Difference]: Without dead ends: 219 [2020-09-16 14:06:23,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:06:23,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-16 14:06:23,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 169. [2020-09-16 14:06:23,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-16 14:06:23,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 419 transitions. [2020-09-16 14:06:23,626 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 419 transitions. Word has length 14 [2020-09-16 14:06:23,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:06:23,627 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 419 transitions. [2020-09-16 14:06:23,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:06:23,627 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 419 transitions. [2020-09-16 14:06:23,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:06:23,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:06:23,627 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:06:23,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:23,828 INFO L427 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:06:23,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:06:23,829 INFO L82 PathProgramCache]: Analyzing trace with hash 595365803, now seen corresponding path program 32 times [2020-09-16 14:06:23,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:06:23,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891838049] [2020-09-16 14:06:23,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:06:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:24,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891838049] [2020-09-16 14:06:24,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266977619] [2020-09-16 14:06:24,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:24,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:06:24,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:06:24,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:06:24,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:06:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:24,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:06:24,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:06:24,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650246396] [2020-09-16 14:06:24,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:06:24,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:06:24,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:06:24,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:06:24,851 INFO L87 Difference]: Start difference. First operand 169 states and 419 transitions. Second operand 19 states. [2020-09-16 14:06:25,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:06:25,365 INFO L93 Difference]: Finished difference Result 221 states and 518 transitions. [2020-09-16 14:06:25,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 14:06:25,367 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-16 14:06:25,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:06:25,368 INFO L225 Difference]: With dead ends: 221 [2020-09-16 14:06:25,368 INFO L226 Difference]: Without dead ends: 218 [2020-09-16 14:06:25,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:06:25,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-09-16 14:06:25,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 170. [2020-09-16 14:06:25,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-16 14:06:25,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 424 transitions. [2020-09-16 14:06:25,371 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 424 transitions. Word has length 14 [2020-09-16 14:06:25,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:06:25,371 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 424 transitions. [2020-09-16 14:06:25,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:06:25,372 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 424 transitions. [2020-09-16 14:06:25,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:06:25,372 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:06:25,372 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:06:25,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-09-16 14:06:25,573 INFO L427 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:06:25,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:06:25,574 INFO L82 PathProgramCache]: Analyzing trace with hash 616815323, now seen corresponding path program 33 times [2020-09-16 14:06:25,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:06:25,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683941166] [2020-09-16 14:06:25,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:06:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:25,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683941166] [2020-09-16 14:06:25,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041337737] [2020-09-16 14:06:25,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:25,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-16 14:06:25,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:06:25,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:06:25,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:06:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:26,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:06:26,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:06:26,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279243697] [2020-09-16 14:06:26,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:06:26,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:06:26,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:06:26,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:06:26,461 INFO L87 Difference]: Start difference. First operand 170 states and 424 transitions. Second operand 19 states. [2020-09-16 14:06:27,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:06:27,030 INFO L93 Difference]: Finished difference Result 220 states and 518 transitions. [2020-09-16 14:06:27,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:06:27,032 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-16 14:06:27,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:06:27,033 INFO L225 Difference]: With dead ends: 220 [2020-09-16 14:06:27,033 INFO L226 Difference]: Without dead ends: 217 [2020-09-16 14:06:27,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:06:27,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-16 14:06:27,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 172. [2020-09-16 14:06:27,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-16 14:06:27,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 431 transitions. [2020-09-16 14:06:27,036 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 431 transitions. Word has length 14 [2020-09-16 14:06:27,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:06:27,036 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 431 transitions. [2020-09-16 14:06:27,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:06:27,036 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 431 transitions. [2020-09-16 14:06:27,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:06:27,037 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:06:27,037 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:06:27,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:27,238 INFO L427 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:06:27,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:06:27,238 INFO L82 PathProgramCache]: Analyzing trace with hash 617507243, now seen corresponding path program 34 times [2020-09-16 14:06:27,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:06:27,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389519652] [2020-09-16 14:06:27,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:06:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:27,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389519652] [2020-09-16 14:06:27,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751710777] [2020-09-16 14:06:27,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:27,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:06:27,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:06:27,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:06:27,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:06:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:28,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:06:28,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:06:28,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036977175] [2020-09-16 14:06:28,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:06:28,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:06:28,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:06:28,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:06:28,367 INFO L87 Difference]: Start difference. First operand 172 states and 431 transitions. Second operand 19 states. [2020-09-16 14:06:29,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:06:29,118 INFO L93 Difference]: Finished difference Result 219 states and 518 transitions. [2020-09-16 14:06:29,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:06:29,123 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-16 14:06:29,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:06:29,124 INFO L225 Difference]: With dead ends: 219 [2020-09-16 14:06:29,124 INFO L226 Difference]: Without dead ends: 216 [2020-09-16 14:06:29,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:06:29,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-16 14:06:29,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 174. [2020-09-16 14:06:29,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-16 14:06:29,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 438 transitions. [2020-09-16 14:06:29,127 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 438 transitions. Word has length 14 [2020-09-16 14:06:29,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:06:29,128 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 438 transitions. [2020-09-16 14:06:29,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:06:29,128 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 438 transitions. [2020-09-16 14:06:29,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:06:29,128 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:06:29,128 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:06:29,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:29,329 INFO L427 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:06:29,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:06:29,330 INFO L82 PathProgramCache]: Analyzing trace with hash 617529563, now seen corresponding path program 35 times [2020-09-16 14:06:29,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:06:29,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591583589] [2020-09-16 14:06:29,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:06:29,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:29,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591583589] [2020-09-16 14:06:29,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181763888] [2020-09-16 14:06:29,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:29,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-16 14:06:29,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:06:29,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:06:29,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:06:30,209 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:06:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:30,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:06:30,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:06:30,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854765061] [2020-09-16 14:06:30,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:06:30,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:06:30,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:06:30,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:06:30,258 INFO L87 Difference]: Start difference. First operand 174 states and 438 transitions. Second operand 19 states. [2020-09-16 14:06:31,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:06:31,205 INFO L93 Difference]: Finished difference Result 228 states and 542 transitions. [2020-09-16 14:06:31,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:06:31,209 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-16 14:06:31,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:06:31,209 INFO L225 Difference]: With dead ends: 228 [2020-09-16 14:06:31,210 INFO L226 Difference]: Without dead ends: 222 [2020-09-16 14:06:31,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=223, Invalid=479, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:06:31,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-16 14:06:31,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 170. [2020-09-16 14:06:31,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-16 14:06:31,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 432 transitions. [2020-09-16 14:06:31,215 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 432 transitions. Word has length 14 [2020-09-16 14:06:31,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:06:31,216 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 432 transitions. [2020-09-16 14:06:31,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:06:31,216 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 432 transitions. [2020-09-16 14:06:31,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:06:31,216 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:06:31,217 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:06:31,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2020-09-16 14:06:31,428 INFO L427 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:06:31,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:06:31,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1771658259, now seen corresponding path program 241 times [2020-09-16 14:06:31,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:06:31,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611058467] [2020-09-16 14:06:31,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:06:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:31,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611058467] [2020-09-16 14:06:31,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110610099] [2020-09-16 14:06:31,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:31,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:06:31,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:06:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:32,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:06:32,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:06:32,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878833974] [2020-09-16 14:06:32,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:06:32,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:06:32,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:06:32,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:06:32,559 INFO L87 Difference]: Start difference. First operand 170 states and 432 transitions. Second operand 19 states. [2020-09-16 14:06:32,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:06:32,785 INFO L93 Difference]: Finished difference Result 213 states and 518 transitions. [2020-09-16 14:06:32,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 14:06:32,789 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:06:32,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:06:32,790 INFO L225 Difference]: With dead ends: 213 [2020-09-16 14:06:32,790 INFO L226 Difference]: Without dead ends: 211 [2020-09-16 14:06:32,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:06:32,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-16 14:06:32,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 180. [2020-09-16 14:06:32,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-09-16 14:06:32,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 462 transitions. [2020-09-16 14:06:32,794 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 462 transitions. Word has length 15 [2020-09-16 14:06:32,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:06:32,794 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 462 transitions. [2020-09-16 14:06:32,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:06:32,794 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 462 transitions. [2020-09-16 14:06:32,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:06:32,795 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:06:32,795 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:06:32,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:32,996 INFO L427 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:06:32,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:06:32,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1771657298, now seen corresponding path program 242 times [2020-09-16 14:06:32,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:06:32,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206645431] [2020-09-16 14:06:32,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:06:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:33,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206645431] [2020-09-16 14:06:33,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709648487] [2020-09-16 14:06:33,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:33,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:06:33,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:06:33,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:06:33,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:06:34,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:34,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:06:34,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:06:34,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747166291] [2020-09-16 14:06:34,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:06:34,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:06:34,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:06:34,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:06:34,147 INFO L87 Difference]: Start difference. First operand 180 states and 462 transitions. Second operand 19 states. [2020-09-16 14:06:35,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:06:35,023 INFO L93 Difference]: Finished difference Result 226 states and 544 transitions. [2020-09-16 14:06:35,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 14:06:35,027 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:06:35,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:06:35,028 INFO L225 Difference]: With dead ends: 226 [2020-09-16 14:06:35,028 INFO L226 Difference]: Without dead ends: 224 [2020-09-16 14:06:35,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:06:35,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-16 14:06:35,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 178. [2020-09-16 14:06:35,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-09-16 14:06:35,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 456 transitions. [2020-09-16 14:06:35,032 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 456 transitions. Word has length 15 [2020-09-16 14:06:35,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:06:35,032 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 456 transitions. [2020-09-16 14:06:35,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:06:35,032 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 456 transitions. [2020-09-16 14:06:35,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:06:35,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:06:35,033 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:06:35,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:35,234 INFO L427 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:06:35,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:06:35,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1771628468, now seen corresponding path program 243 times [2020-09-16 14:06:35,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:06:35,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034500713] [2020-09-16 14:06:35,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:06:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:35,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034500713] [2020-09-16 14:06:35,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304650127] [2020-09-16 14:06:35,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:35,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:06:35,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:06:35,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:06:35,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:06:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:36,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:06:36,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:06:36,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091059125] [2020-09-16 14:06:36,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:06:36,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:06:36,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:06:36,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:06:36,488 INFO L87 Difference]: Start difference. First operand 178 states and 456 transitions. Second operand 19 states. [2020-09-16 14:06:37,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:06:37,366 INFO L93 Difference]: Finished difference Result 241 states and 574 transitions. [2020-09-16 14:06:37,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 14:06:37,367 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:06:37,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:06:37,368 INFO L225 Difference]: With dead ends: 241 [2020-09-16 14:06:37,368 INFO L226 Difference]: Without dead ends: 239 [2020-09-16 14:06:37,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2020-09-16 14:06:37,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-16 14:06:37,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 176. [2020-09-16 14:06:37,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-16 14:06:37,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 450 transitions. [2020-09-16 14:06:37,372 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 450 transitions. Word has length 15 [2020-09-16 14:06:37,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:06:37,372 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 450 transitions. [2020-09-16 14:06:37,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:06:37,372 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 450 transitions. [2020-09-16 14:06:37,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:06:37,372 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:06:37,372 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:06:37,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:37,573 INFO L427 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:06:37,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:06:37,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1770734738, now seen corresponding path program 244 times [2020-09-16 14:06:37,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:06:37,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471960307] [2020-09-16 14:06:37,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:06:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:37,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471960307] [2020-09-16 14:06:37,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264701953] [2020-09-16 14:06:37,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:38,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:06:38,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:06:38,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:06:38,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:06:38,762 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:38,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:06:38,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:06:38,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638039786] [2020-09-16 14:06:38,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:06:38,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:06:38,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:06:38,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:06:38,764 INFO L87 Difference]: Start difference. First operand 176 states and 450 transitions. Second operand 19 states. [2020-09-16 14:06:39,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:06:39,940 INFO L93 Difference]: Finished difference Result 243 states and 578 transitions. [2020-09-16 14:06:39,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 14:06:39,942 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:06:39,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:06:39,943 INFO L225 Difference]: With dead ends: 243 [2020-09-16 14:06:39,943 INFO L226 Difference]: Without dead ends: 241 [2020-09-16 14:06:39,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=244, Invalid=458, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:06:39,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-16 14:06:39,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 178. [2020-09-16 14:06:39,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-09-16 14:06:39,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 456 transitions. [2020-09-16 14:06:39,947 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 456 transitions. Word has length 15 [2020-09-16 14:06:39,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:06:39,947 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 456 transitions. [2020-09-16 14:06:39,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:06:39,947 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 456 transitions. [2020-09-16 14:06:39,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:06:39,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:06:39,947 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:06:40,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:40,150 INFO L427 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:06:40,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:06:40,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1770733777, now seen corresponding path program 245 times [2020-09-16 14:06:40,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:06:40,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955081376] [2020-09-16 14:06:40,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:06:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:40,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955081376] [2020-09-16 14:06:40,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260975170] [2020-09-16 14:06:40,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:40,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:06:40,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:06:40,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:06:40,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:06:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:43,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:06:43,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:06:43,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201943190] [2020-09-16 14:06:43,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:06:43,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:06:43,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:06:43,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=236, Unknown=1, NotChecked=0, Total=342 [2020-09-16 14:06:43,445 INFO L87 Difference]: Start difference. First operand 178 states and 456 transitions. Second operand 19 states. [2020-09-16 14:06:47,947 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-09-16 14:06:48,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:06:48,937 INFO L93 Difference]: Finished difference Result 253 states and 599 transitions. [2020-09-16 14:06:48,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 14:06:48,940 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:06:48,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:06:48,941 INFO L225 Difference]: With dead ends: 253 [2020-09-16 14:06:48,941 INFO L226 Difference]: Without dead ends: 251 [2020-09-16 14:06:48,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=231, Invalid=470, Unknown=1, NotChecked=0, Total=702 [2020-09-16 14:06:48,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-16 14:06:48,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 177. [2020-09-16 14:06:48,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-16 14:06:48,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-16 14:06:48,946 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-16 14:06:48,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:06:48,946 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-16 14:06:48,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:06:48,946 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-16 14:06:48,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:06:48,946 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:06:48,947 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:06:49,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-09-16 14:06:49,148 INFO L427 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:06:49,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:06:49,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1770704947, now seen corresponding path program 246 times [2020-09-16 14:06:49,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:06:49,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159776972] [2020-09-16 14:06:49,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:06:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:49,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159776972] [2020-09-16 14:06:49,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112572950] [2020-09-16 14:06:49,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:49,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:06:49,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:06:49,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:06:49,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:06:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:50,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:06:50,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:06:50,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188566099] [2020-09-16 14:06:50,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:06:50,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:06:50,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:06:50,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:06:50,342 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-16 14:06:51,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:06:51,547 INFO L93 Difference]: Finished difference Result 247 states and 589 transitions. [2020-09-16 14:06:51,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 14:06:51,551 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:06:51,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:06:51,552 INFO L225 Difference]: With dead ends: 247 [2020-09-16 14:06:51,552 INFO L226 Difference]: Without dead ends: 245 [2020-09-16 14:06:51,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:06:51,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-09-16 14:06:51,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 174. [2020-09-16 14:06:51,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-16 14:06:51,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 444 transitions. [2020-09-16 14:06:51,556 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 444 transitions. Word has length 15 [2020-09-16 14:06:51,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:06:51,556 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 444 transitions. [2020-09-16 14:06:51,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:06:51,556 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 444 transitions. [2020-09-16 14:06:51,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:06:51,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:06:51,556 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:06:51,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-09-16 14:06:51,757 INFO L427 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:06:51,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:06:51,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1743029108, now seen corresponding path program 247 times [2020-09-16 14:06:51,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:06:51,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141737423] [2020-09-16 14:06:51,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:06:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:52,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:52,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141737423] [2020-09-16 14:06:52,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992341278] [2020-09-16 14:06:52,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:52,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:52,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:06:52,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:06:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:57,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:06:57,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:06:57,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143927053] [2020-09-16 14:06:57,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:06:57,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:06:57,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:06:57,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:06:57,107 INFO L87 Difference]: Start difference. First operand 174 states and 444 transitions. Second operand 19 states. [2020-09-16 14:06:58,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:06:58,395 INFO L93 Difference]: Finished difference Result 245 states and 582 transitions. [2020-09-16 14:06:58,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:06:58,399 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:06:58,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:06:58,399 INFO L225 Difference]: With dead ends: 245 [2020-09-16 14:06:58,400 INFO L226 Difference]: Without dead ends: 243 [2020-09-16 14:06:58,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2020-09-16 14:06:58,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-16 14:06:58,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 177. [2020-09-16 14:06:58,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-16 14:06:58,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-16 14:06:58,404 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-16 14:06:58,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:06:58,404 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-16 14:06:58,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:06:58,404 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-16 14:06:58,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:06:58,404 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:06:58,404 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:06:58,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-09-16 14:06:58,605 INFO L427 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:06:58,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:06:58,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1743028147, now seen corresponding path program 248 times [2020-09-16 14:06:58,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:06:58,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522209727] [2020-09-16 14:06:58,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:06:58,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:58,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522209727] [2020-09-16 14:06:58,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019872615] [2020-09-16 14:06:58,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:59,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:06:59,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:06:59,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:06:59,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:07:05,634 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 37 [2020-09-16 14:07:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:11,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:07:11,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:07:11,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568578422] [2020-09-16 14:07:11,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:07:11,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:07:11,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:07:11,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=237, Unknown=2, NotChecked=0, Total=342 [2020-09-16 14:07:11,131 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-16 14:07:11,868 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 20 [2020-09-16 14:07:14,158 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 41 [2020-09-16 14:07:15,900 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-09-16 14:07:20,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:07:20,275 INFO L93 Difference]: Finished difference Result 251 states and 595 transitions. [2020-09-16 14:07:20,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:07:20,278 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:07:20,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:07:20,279 INFO L225 Difference]: With dead ends: 251 [2020-09-16 14:07:20,279 INFO L226 Difference]: Without dead ends: 249 [2020-09-16 14:07:20,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=248, Invalid=504, Unknown=4, NotChecked=0, Total=756 [2020-09-16 14:07:20,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-09-16 14:07:20,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 176. [2020-09-16 14:07:20,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-16 14:07:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 450 transitions. [2020-09-16 14:07:20,282 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 450 transitions. Word has length 15 [2020-09-16 14:07:20,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:07:20,282 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 450 transitions. [2020-09-16 14:07:20,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:07:20,282 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 450 transitions. [2020-09-16 14:07:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:07:20,283 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:07:20,283 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:07:20,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:07:20,484 INFO L427 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:07:20,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:07:20,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1742999317, now seen corresponding path program 249 times [2020-09-16 14:07:20,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:07:20,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073861729] [2020-09-16 14:07:20,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:07:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:07:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:20,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073861729] [2020-09-16 14:07:20,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109390780] [2020-09-16 14:07:20,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:07:20,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:07:20,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:07:20,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:07:20,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:07:30,250 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-09-16 14:07:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:32,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:07:32,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:07:32,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545057059] [2020-09-16 14:07:32,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:07:32,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:07:32,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:07:32,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=234, Unknown=3, NotChecked=0, Total=342 [2020-09-16 14:07:32,791 INFO L87 Difference]: Start difference. First operand 176 states and 450 transitions. Second operand 19 states. [2020-09-16 14:07:37,288 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-16 14:07:50,517 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-09-16 14:07:53,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:07:53,133 INFO L93 Difference]: Finished difference Result 254 states and 602 transitions. [2020-09-16 14:07:53,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:07:53,137 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:07:53,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:07:53,138 INFO L225 Difference]: With dead ends: 254 [2020-09-16 14:07:53,138 INFO L226 Difference]: Without dead ends: 252 [2020-09-16 14:07:53,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=253, Invalid=496, Unknown=7, NotChecked=0, Total=756 [2020-09-16 14:07:53,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-09-16 14:07:53,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 177. [2020-09-16 14:07:53,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-16 14:07:53,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-16 14:07:53,142 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-16 14:07:53,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:07:53,142 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-16 14:07:53,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:07:53,142 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-16 14:07:53,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:07:53,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:07:53,143 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:07:53,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2020-09-16 14:07:53,344 INFO L427 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:07:53,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:07:53,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1742104626, now seen corresponding path program 250 times [2020-09-16 14:07:53,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:07:53,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702619944] [2020-09-16 14:07:53,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:07:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:07:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:53,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702619944] [2020-09-16 14:07:53,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001180568] [2020-09-16 14:07:53,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:07:53,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:07:53,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:07:53,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:07:53,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:07:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:56,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:07:56,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:07:56,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089400668] [2020-09-16 14:07:56,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:07:56,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:07:56,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:07:56,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:07:56,051 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-16 14:07:56,867 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-09-16 14:07:57,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:07:57,426 INFO L93 Difference]: Finished difference Result 256 states and 605 transitions. [2020-09-16 14:07:57,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:07:57,429 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:07:57,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:07:57,429 INFO L225 Difference]: With dead ends: 256 [2020-09-16 14:07:57,430 INFO L226 Difference]: Without dead ends: 254 [2020-09-16 14:07:57,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2020-09-16 14:07:57,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-09-16 14:07:57,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 172. [2020-09-16 14:07:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-16 14:07:57,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 438 transitions. [2020-09-16 14:07:57,433 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 438 transitions. Word has length 15 [2020-09-16 14:07:57,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:07:57,433 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 438 transitions. [2020-09-16 14:07:57,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:07:57,433 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 438 transitions. [2020-09-16 14:07:57,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:07:57,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:07:57,434 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:07:57,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2020-09-16 14:07:57,635 INFO L427 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:07:57,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:07:57,635 INFO L82 PathProgramCache]: Analyzing trace with hash -884154578, now seen corresponding path program 251 times [2020-09-16 14:07:57,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:07:57,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989608966] [2020-09-16 14:07:57,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:07:57,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:07:57,971 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:57,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989608966] [2020-09-16 14:07:57,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129790255] [2020-09-16 14:07:57,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:07:58,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:07:58,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:07:58,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:07:58,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:07:58,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:58,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:07:58,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:07:58,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781850736] [2020-09-16 14:07:58,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:07:58,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:07:58,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:07:58,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:07:58,572 INFO L87 Difference]: Start difference. First operand 172 states and 438 transitions. Second operand 19 states. [2020-09-16 14:07:59,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:07:59,885 INFO L93 Difference]: Finished difference Result 247 states and 586 transitions. [2020-09-16 14:07:59,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:07:59,888 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:07:59,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:07:59,889 INFO L225 Difference]: With dead ends: 247 [2020-09-16 14:07:59,889 INFO L226 Difference]: Without dead ends: 245 [2020-09-16 14:07:59,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2020-09-16 14:07:59,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-09-16 14:07:59,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 176. [2020-09-16 14:07:59,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-16 14:07:59,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 450 transitions. [2020-09-16 14:07:59,892 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 450 transitions. Word has length 15 [2020-09-16 14:07:59,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:07:59,892 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 450 transitions. [2020-09-16 14:07:59,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:07:59,892 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 450 transitions. [2020-09-16 14:07:59,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:07:59,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:07:59,893 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:00,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:00,094 INFO L427 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:00,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:00,095 INFO L82 PathProgramCache]: Analyzing trace with hash -884153617, now seen corresponding path program 252 times [2020-09-16 14:08:00,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:00,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597848991] [2020-09-16 14:08:00,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:00,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:00,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597848991] [2020-09-16 14:08:00,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724643844] [2020-09-16 14:08:00,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:00,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:08:00,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:00,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:00,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:01,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:01,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:08:01,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938879282] [2020-09-16 14:08:01,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:08:01,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:01,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:08:01,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:08:01,082 INFO L87 Difference]: Start difference. First operand 176 states and 450 transitions. Second operand 19 states.