/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7a177ad [2020-11-09 12:01:49,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-09 12:01:49,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-09 12:01:49,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-09 12:01:49,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-09 12:01:49,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-09 12:01:49,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-09 12:01:49,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-09 12:01:49,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-09 12:01:49,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-09 12:01:49,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-09 12:01:49,740 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-09 12:01:49,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-09 12:01:49,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-09 12:01:49,743 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-09 12:01:49,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-09 12:01:49,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-09 12:01:49,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-09 12:01:49,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-09 12:01:49,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-09 12:01:49,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-09 12:01:49,780 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-09 12:01:49,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-09 12:01:49,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-09 12:01:49,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-09 12:01:49,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-09 12:01:49,795 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-09 12:01:49,797 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-09 12:01:49,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-09 12:01:49,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-09 12:01:49,800 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-09 12:01:49,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-09 12:01:49,803 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-09 12:01:49,804 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-09 12:01:49,805 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-09 12:01:49,805 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-09 12:01:49,806 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-09 12:01:49,806 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-09 12:01:49,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-09 12:01:49,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-09 12:01:49,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-09 12:01:49,810 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 [2020-11-09 12:01:49,862 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-09 12:01:49,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-09 12:01:49,867 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-09 12:01:49,867 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-09 12:01:49,867 INFO L138 SettingsManager]: * Use SBE=true [2020-11-09 12:01:49,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-09 12:01:49,868 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-09 12:01:49,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-09 12:01:49,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-09 12:01:49,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-09 12:01:49,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-09 12:01:49,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-09 12:01:49,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-09 12:01:49,871 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-09 12:01:49,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-09 12:01:49,871 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-09 12:01:49,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-09 12:01:49,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-09 12:01:49,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-09 12:01:49,872 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-09 12:01:49,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-09 12:01:49,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-09 12:01:49,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-09 12:01:49,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-09 12:01:49,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-09 12:01:49,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-09 12:01:49,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-09 12:01:49,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-09 12:01:49,874 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-09 12:01:49,874 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-09 12:01:50,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-09 12:01:50,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-09 12:01:50,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-09 12:01:50,413 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-09 12:01:50,413 INFO L275 PluginConnector]: CDTParser initialized [2020-11-09 12:01:50,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2020-11-09 12:01:50,501 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e48744bf/4cda796d7b1246bfb55928507624601f/FLAG8e5a95d1f [2020-11-09 12:01:51,398 INFO L306 CDTParser]: Found 1 translation units. [2020-11-09 12:01:51,398 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i [2020-11-09 12:01:51,421 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e48744bf/4cda796d7b1246bfb55928507624601f/FLAG8e5a95d1f [2020-11-09 12:01:51,632 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e48744bf/4cda796d7b1246bfb55928507624601f [2020-11-09 12:01:51,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-09 12:01:51,647 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-09 12:01:51,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-09 12:01:51,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-09 12:01:51,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-09 12:01:51,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 12:01:51" (1/1) ... [2020-11-09 12:01:51,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a577ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:01:51, skipping insertion in model container [2020-11-09 12:01:51,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 12:01:51" (1/1) ... [2020-11-09 12:01:51,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-09 12:01:51,738 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-09 12:01:52,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 12:01:52,160 INFO L203 MainTranslator]: Completed pre-run [2020-11-09 12:01:52,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 12:01:52,311 INFO L208 MainTranslator]: Completed translation [2020-11-09 12:01:52,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:01:52 WrapperNode [2020-11-09 12:01:52,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-09 12:01:52,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-09 12:01:52,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-09 12:01:52,314 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-09 12:01:52,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:01:52" (1/1) ... [2020-11-09 12:01:52,339 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:01:52" (1/1) ... [2020-11-09 12:01:52,362 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-09 12:01:52,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-09 12:01:52,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-09 12:01:52,363 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-09 12:01:52,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:01:52" (1/1) ... [2020-11-09 12:01:52,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:01:52" (1/1) ... [2020-11-09 12:01:52,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:01:52" (1/1) ... [2020-11-09 12:01:52,377 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:01:52" (1/1) ... [2020-11-09 12:01:52,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:01:52" (1/1) ... [2020-11-09 12:01:52,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:01:52" (1/1) ... [2020-11-09 12:01:52,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:01:52" (1/1) ... [2020-11-09 12:01:52,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-09 12:01:52,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-09 12:01:52,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-09 12:01:52,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-09 12:01:52,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:01:52" (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 [2020-11-09 12:01:52,478 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-09 12:01:52,478 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-09 12:01:52,478 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-09 12:01:52,478 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-09 12:01:52,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-09 12:01:52,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-09 12:01:52,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-09 12:01:52,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-09 12:01:52,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-09 12:01:52,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-09 12:01:52,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-09 12:01:52,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-09 12:01:52,482 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-09 12:01:52,970 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-09 12:01:52,970 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-09 12:01:52,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 12:01:52 BoogieIcfgContainer [2020-11-09 12:01:52,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-09 12:01:52,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-09 12:01:52,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-09 12:01:52,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-09 12:01:52,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 12:01:51" (1/3) ... [2020-11-09 12:01:52,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aaccdcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 12:01:52, skipping insertion in model container [2020-11-09 12:01:52,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:01:52" (2/3) ... [2020-11-09 12:01:52,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aaccdcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 12:01:52, skipping insertion in model container [2020-11-09 12:01:52,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 12:01:52" (3/3) ... [2020-11-09 12:01:52,983 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2020-11-09 12:01:53,002 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-09 12:01:53,003 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-09 12:01:53,007 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-09 12:01:53,008 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-09 12:01:53,040 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,041 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,041 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,041 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,041 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,041 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,042 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,042 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,043 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,043 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,043 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,043 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,044 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,044 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,044 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,044 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,045 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,045 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,045 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,045 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,046 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,046 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,046 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,047 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,047 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,047 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,047 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,048 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,048 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,048 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,049 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,049 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,049 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,050 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,050 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,050 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,050 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,051 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,051 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,051 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,052 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,052 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,052 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,053 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,053 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,053 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,054 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,054 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,054 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,054 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,055 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,055 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,055 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,055 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,056 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,056 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,056 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,056 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,056 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,057 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,059 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,060 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,060 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,060 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,061 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,061 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,067 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,067 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,068 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,068 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,068 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,068 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 12:01:53,071 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-09 12:01:53,086 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-09 12:01:53,112 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-09 12:01:53,112 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-09 12:01:53,113 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-09 12:01:53,113 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-09 12:01:53,113 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-09 12:01:53,113 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-09 12:01:53,113 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-09 12:01:53,113 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-09 12:01:53,127 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-09 12:01:53,130 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 66 transitions, 142 flow [2020-11-09 12:01:53,133 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 66 transitions, 142 flow [2020-11-09 12:01:53,136 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 67 places, 66 transitions, 142 flow [2020-11-09 12:01:53,178 INFO L129 PetriNetUnfolder]: 6/64 cut-off events. [2020-11-09 12:01:53,178 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-09 12:01:53,184 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 6/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 107 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2020-11-09 12:01:53,186 INFO L116 LiptonReduction]: Number of co-enabled transitions 1272 [2020-11-09 12:01:55,670 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-09 12:01:55,836 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-09 12:01:56,315 WARN L194 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-11-09 12:01:56,461 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-11-09 12:01:56,808 WARN L194 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-11-09 12:01:56,971 WARN L194 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-11-09 12:01:57,092 INFO L131 LiptonReduction]: Checked pairs total: 1183 [2020-11-09 12:01:57,092 INFO L133 LiptonReduction]: Total number of compositions: 65 [2020-11-09 12:01:57,101 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-11-09 12:01:57,116 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-11-09 12:01:57,119 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-09 12:01:57,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-09 12:01:57,127 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:01:57,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-09 12:01:57,133 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:01:57,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:01:57,145 INFO L82 PathProgramCache]: Analyzing trace with hash -542844556, now seen corresponding path program 1 times [2020-11-09 12:01:57,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:01:57,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860023667] [2020-11-09 12:01:57,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:01:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:01:57,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:01:57,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860023667] [2020-11-09 12:01:57,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 12:01:57,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-09 12:01:57,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736368382] [2020-11-09 12:01:57,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-09 12:01:57,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:01:57,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-09 12:01:57,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-09 12:01:57,478 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-11-09 12:01:57,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:01:57,548 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-11-09 12:01:57,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-09 12:01:57,550 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-09 12:01:57,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:01:57,562 INFO L225 Difference]: With dead ends: 83 [2020-11-09 12:01:57,563 INFO L226 Difference]: Without dead ends: 54 [2020-11-09 12:01:57,564 INFO L677 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 [2020-11-09 12:01:57,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-09 12:01:57,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-11-09 12:01:57,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-09 12:01:57,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-11-09 12:01:57,608 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-11-09 12:01:57,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:01:57,609 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-11-09 12:01:57,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-09 12:01:57,609 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-11-09 12:01:57,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-09 12:01:57,610 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:01:57,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:01:57,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-09 12:01:57,611 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:01:57,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:01:57,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1940739433, now seen corresponding path program 1 times [2020-11-09 12:01:57,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:01:57,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022505581] [2020-11-09 12:01:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:01:57,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:01:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:01:57,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022505581] [2020-11-09 12:01:57,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 12:01:57,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-09 12:01:57,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591063099] [2020-11-09 12:01:57,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-09 12:01:57,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:01:57,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-09 12:01:57,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-09 12:01:57,733 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-11-09 12:01:57,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:01:57,786 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-11-09 12:01:57,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 12:01:57,787 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-09 12:01:57,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:01:57,788 INFO L225 Difference]: With dead ends: 80 [2020-11-09 12:01:57,789 INFO L226 Difference]: Without dead ends: 75 [2020-11-09 12:01:57,789 INFO L677 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 [2020-11-09 12:01:57,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-09 12:01:57,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-11-09 12:01:57,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-09 12:01:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-11-09 12:01:57,801 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-11-09 12:01:57,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:01:57,802 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-11-09 12:01:57,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-09 12:01:57,802 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-11-09 12:01:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-09 12:01:57,803 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:01:57,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:01:57,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-09 12:01:57,804 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:01:57,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:01:57,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1981941347, now seen corresponding path program 1 times [2020-11-09 12:01:57,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:01:57,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942607156] [2020-11-09 12:01:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:01:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:01:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:01:57,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942607156] [2020-11-09 12:01:57,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 12:01:57,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-09 12:01:57,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068559265] [2020-11-09 12:01:57,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-09 12:01:57,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:01:57,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-09 12:01:57,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-09 12:01:57,892 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-11-09 12:01:57,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:01:57,989 INFO L93 Difference]: Finished difference Result 83 states and 196 transitions. [2020-11-09 12:01:57,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 12:01:57,991 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-09 12:01:57,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:01:57,993 INFO L225 Difference]: With dead ends: 83 [2020-11-09 12:01:57,994 INFO L226 Difference]: Without dead ends: 77 [2020-11-09 12:01:57,995 INFO L677 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 [2020-11-09 12:01:57,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-09 12:01:58,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2020-11-09 12:01:58,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-09 12:01:58,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-11-09 12:01:58,007 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-11-09 12:01:58,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:01:58,007 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-11-09 12:01:58,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-09 12:01:58,008 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-11-09 12:01:58,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-09 12:01:58,009 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:01:58,009 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:01:58,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-09 12:01:58,009 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:01:58,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:01:58,010 INFO L82 PathProgramCache]: Analyzing trace with hash -33351122, now seen corresponding path program 2 times [2020-11-09 12:01:58,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:01:58,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280484479] [2020-11-09 12:01:58,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:01:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:01:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:01:58,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280484479] [2020-11-09 12:01:58,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041434312] [2020-11-09 12:01:58,122 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 [2020-11-09 12:01:58,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 12:01:58,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:01:58,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 12:01:58,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:01:58,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:01:58,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:01:58,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:01:58,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-11-09 12:01:58,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956321896] [2020-11-09 12:01:58,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 12:01:58,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:01:58,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 12:01:58,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-09 12:01:58,312 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 9 states. [2020-11-09 12:01:58,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:01:58,463 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-11-09 12:01:58,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-09 12:01:58,464 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-11-09 12:01:58,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:01:58,465 INFO L225 Difference]: With dead ends: 101 [2020-11-09 12:01:58,466 INFO L226 Difference]: Without dead ends: 96 [2020-11-09 12:01:58,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-11-09 12:01:58,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-11-09 12:01:58,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-11-09 12:01:58,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-09 12:01:58,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-11-09 12:01:58,477 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-11-09 12:01:58,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:01:58,477 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-11-09 12:01:58,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 12:01:58,478 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-11-09 12:01:58,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-09 12:01:58,479 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:01:58,479 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:01:58,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:01:58,693 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:01:58,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:01:58,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1310611417, now seen corresponding path program 2 times [2020-11-09 12:01:58,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:01:58,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103522069] [2020-11-09 12:01:58,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:01:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:01:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:01:58,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103522069] [2020-11-09 12:01:58,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871513421] [2020-11-09 12:01:58,786 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 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 [2020-11-09 12:01:58,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 12:01:58,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:01:58,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 12:01:58,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:01:58,934 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:01:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:01:58,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:01:58,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-11-09 12:01:58,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359009569] [2020-11-09 12:01:58,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 12:01:58,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:01:58,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 12:01:58,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-09 12:01:58,950 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-11-09 12:01:59,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:01:59,075 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-11-09 12:01:59,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-09 12:01:59,076 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-11-09 12:01:59,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:01:59,078 INFO L225 Difference]: With dead ends: 96 [2020-11-09 12:01:59,078 INFO L226 Difference]: Without dead ends: 90 [2020-11-09 12:01:59,078 INFO L677 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 [2020-11-09 12:01:59,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-09 12:01:59,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2020-11-09 12:01:59,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-09 12:01:59,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-11-09 12:01:59,092 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-11-09 12:01:59,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:01:59,093 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-11-09 12:01:59,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 12:01:59,093 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-11-09 12:01:59,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 12:01:59,094 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:01:59,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:01:59,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:01:59,312 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:01:59,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:01:59,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1043120626, now seen corresponding path program 1 times [2020-11-09 12:01:59,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:01:59,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855961703] [2020-11-09 12:01:59,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:01:59,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:01:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:01:59,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855961703] [2020-11-09 12:01:59,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 12:01:59,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 12:01:59,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90787647] [2020-11-09 12:01:59,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-09 12:01:59,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:01:59,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-09 12:01:59,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-09 12:01:59,413 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-11-09 12:01:59,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:01:59,510 INFO L93 Difference]: Finished difference Result 103 states and 242 transitions. [2020-11-09 12:01:59,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-09 12:01:59,511 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-09 12:01:59,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:01:59,512 INFO L225 Difference]: With dead ends: 103 [2020-11-09 12:01:59,512 INFO L226 Difference]: Without dead ends: 98 [2020-11-09 12:01:59,513 INFO L677 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 [2020-11-09 12:01:59,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-09 12:01:59,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2020-11-09 12:01:59,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-09 12:01:59,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-11-09 12:01:59,522 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 10 [2020-11-09 12:01:59,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:01:59,523 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-11-09 12:01:59,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-09 12:01:59,523 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-11-09 12:01:59,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 12:01:59,524 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:01:59,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:01:59,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-09 12:01:59,525 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:01:59,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:01:59,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1043091796, now seen corresponding path program 2 times [2020-11-09 12:01:59,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:01:59,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864431273] [2020-11-09 12:01:59,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:01:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:01:59,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:01:59,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864431273] [2020-11-09 12:01:59,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 12:01:59,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 12:01:59,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102464979] [2020-11-09 12:01:59,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-09 12:01:59,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:01:59,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-09 12:01:59,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-09 12:01:59,591 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 6 states. [2020-11-09 12:01:59,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:01:59,694 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-11-09 12:01:59,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-09 12:01:59,695 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-09 12:01:59,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:01:59,714 INFO L225 Difference]: With dead ends: 107 [2020-11-09 12:01:59,714 INFO L226 Difference]: Without dead ends: 102 [2020-11-09 12:01:59,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-11-09 12:01:59,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-09 12:01:59,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 82. [2020-11-09 12:01:59,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-09 12:01:59,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-11-09 12:01:59,724 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-11-09 12:01:59,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:01:59,725 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-11-09 12:01:59,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-09 12:01:59,725 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-11-09 12:01:59,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 12:01:59,726 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:01:59,726 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:01:59,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-09 12:01:59,726 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:01:59,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:01:59,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1033855625, now seen corresponding path program 3 times [2020-11-09 12:01:59,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:01:59,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270831775] [2020-11-09 12:01:59,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:01:59,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:01:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:01:59,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270831775] [2020-11-09 12:01:59,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120466416] [2020-11-09 12:01:59,810 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 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 [2020-11-09 12:01:59,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-09 12:01:59,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:01:59,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 12:01:59,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:01:59,957 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:01:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:01:59,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:01:59,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-09 12:01:59,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875863156] [2020-11-09 12:01:59,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 12:01:59,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:01:59,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 12:01:59,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-11-09 12:01:59,971 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 11 states. [2020-11-09 12:02:00,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:02:00,180 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-11-09 12:02:00,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 12:02:00,180 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-11-09 12:02:00,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:02:00,182 INFO L225 Difference]: With dead ends: 122 [2020-11-09 12:02:00,182 INFO L226 Difference]: Without dead ends: 117 [2020-11-09 12:02:00,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-11-09 12:02:00,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-11-09 12:02:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-11-09 12:02:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-09 12:02:00,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-11-09 12:02:00,190 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-11-09 12:02:00,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:02:00,191 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-11-09 12:02:00,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 12:02:00,191 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-11-09 12:02:00,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 12:02:00,192 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:02:00,192 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:02:00,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:02:00,407 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:02:00,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:02:00,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1974220067, now seen corresponding path program 3 times [2020-11-09 12:02:00,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:02:00,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215183188] [2020-11-09 12:02:00,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:02:00,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:00,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215183188] [2020-11-09 12:02:00,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595914426] [2020-11-09 12:02:00,511 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 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 [2020-11-09 12:02:00,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-09 12:02:00,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:02:00,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 12:02:00,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:02:00,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:02:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:00,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:02:00,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-09 12:02:00,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985083312] [2020-11-09 12:02:00,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 12:02:00,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:02:00,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 12:02:00,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-11-09 12:02:00,726 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-11-09 12:02:00,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:02:00,851 INFO L93 Difference]: Finished difference Result 121 states and 288 transitions. [2020-11-09 12:02:00,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 12:02:00,852 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-11-09 12:02:00,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:02:00,853 INFO L225 Difference]: With dead ends: 121 [2020-11-09 12:02:00,853 INFO L226 Difference]: Without dead ends: 115 [2020-11-09 12:02:00,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-11-09 12:02:00,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-11-09 12:02:00,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 94. [2020-11-09 12:02:00,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-09 12:02:00,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-11-09 12:02:00,870 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-11-09 12:02:00,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:02:00,871 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-11-09 12:02:00,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 12:02:00,871 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-11-09 12:02:00,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 12:02:00,874 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:02:00,874 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:02:01,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:02:01,088 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:02:01,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:02:01,089 INFO L82 PathProgramCache]: Analyzing trace with hash 2022998328, now seen corresponding path program 3 times [2020-11-09 12:02:01,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:02:01,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866672330] [2020-11-09 12:02:01,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:02:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:01,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866672330] [2020-11-09 12:02:01,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818610821] [2020-11-09 12:02:01,157 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 [2020-11-09 12:02:01,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-09 12:02:01,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:02:01,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 12:02:01,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:02:01,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:02:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:01,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:02:01,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-09 12:02:01,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754325831] [2020-11-09 12:02:01,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 12:02:01,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:02:01,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 12:02:01,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-11-09 12:02:01,364 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-11-09 12:02:01,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:02:01,618 INFO L93 Difference]: Finished difference Result 121 states and 289 transitions. [2020-11-09 12:02:01,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 12:02:01,619 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-11-09 12:02:01,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:02:01,620 INFO L225 Difference]: With dead ends: 121 [2020-11-09 12:02:01,620 INFO L226 Difference]: Without dead ends: 116 [2020-11-09 12:02:01,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2020-11-09 12:02:01,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-11-09 12:02:01,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 94. [2020-11-09 12:02:01,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-09 12:02:01,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-11-09 12:02:01,627 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 11 [2020-11-09 12:02:01,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:02:01,627 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-11-09 12:02:01,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 12:02:01,628 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-11-09 12:02:01,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 12:02:01,629 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:02:01,629 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:02:01,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-09 12:02:01,843 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:02:01,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:02:01,844 INFO L82 PathProgramCache]: Analyzing trace with hash 2023027158, now seen corresponding path program 4 times [2020-11-09 12:02:01,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:02:01,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939483309] [2020-11-09 12:02:01,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:02:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:01,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:01,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939483309] [2020-11-09 12:02:01,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041144521] [2020-11-09 12:02:01,921 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 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 [2020-11-09 12:02:01,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 12:02:01,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:02:01,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 12:02:01,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:02:02,060 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:02:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:02,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:02:02,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-09 12:02:02,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132095530] [2020-11-09 12:02:02,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 12:02:02,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:02:02,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 12:02:02,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-11-09 12:02:02,073 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-11-09 12:02:02,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:02:02,421 INFO L93 Difference]: Finished difference Result 131 states and 313 transitions. [2020-11-09 12:02:02,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 12:02:02,421 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-11-09 12:02:02,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:02:02,423 INFO L225 Difference]: With dead ends: 131 [2020-11-09 12:02:02,423 INFO L226 Difference]: Without dead ends: 126 [2020-11-09 12:02:02,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-11-09 12:02:02,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-11-09 12:02:02,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 95. [2020-11-09 12:02:02,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-09 12:02:02,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 237 transitions. [2020-11-09 12:02:02,430 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 237 transitions. Word has length 11 [2020-11-09 12:02:02,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:02:02,430 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 237 transitions. [2020-11-09 12:02:02,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 12:02:02,431 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 237 transitions. [2020-11-09 12:02:02,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 12:02:02,431 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:02:02,432 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:02:02,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:02:02,647 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:02:02,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:02:02,648 INFO L82 PathProgramCache]: Analyzing trace with hash 2023028119, now seen corresponding path program 5 times [2020-11-09 12:02:02,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:02:02,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679854425] [2020-11-09 12:02:02,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:02:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:02,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679854425] [2020-11-09 12:02:02,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233430515] [2020-11-09 12:02:02,776 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 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 [2020-11-09 12:02:02,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 12:02:02,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:02:02,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 12:02:02,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:02:02,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:02:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:02,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:02:02,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-09 12:02:02,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743338627] [2020-11-09 12:02:02,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 12:02:02,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:02:02,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 12:02:02,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-11-09 12:02:02,960 INFO L87 Difference]: Start difference. First operand 95 states and 237 transitions. Second operand 11 states. [2020-11-09 12:02:03,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:02:03,178 INFO L93 Difference]: Finished difference Result 126 states and 297 transitions. [2020-11-09 12:02:03,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 12:02:03,179 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-11-09 12:02:03,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:02:03,182 INFO L225 Difference]: With dead ends: 126 [2020-11-09 12:02:03,182 INFO L226 Difference]: Without dead ends: 121 [2020-11-09 12:02:03,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-11-09 12:02:03,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-11-09 12:02:03,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2020-11-09 12:02:03,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-09 12:02:03,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 233 transitions. [2020-11-09 12:02:03,193 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 233 transitions. Word has length 11 [2020-11-09 12:02:03,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:02:03,193 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 233 transitions. [2020-11-09 12:02:03,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 12:02:03,193 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 233 transitions. [2020-11-09 12:02:03,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 12:02:03,194 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:02:03,195 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:02:03,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:02:03,396 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:02:03,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:02:03,397 INFO L82 PathProgramCache]: Analyzing trace with hash 2023920888, now seen corresponding path program 6 times [2020-11-09 12:02:03,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:02:03,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068202477] [2020-11-09 12:02:03,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:02:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:03,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068202477] [2020-11-09 12:02:03,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536867823] [2020-11-09 12:02:03,510 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 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 [2020-11-09 12:02:03,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-09 12:02:03,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:02:03,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 12:02:03,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:02:03,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:02:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:03,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:02:03,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-09 12:02:03,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658566663] [2020-11-09 12:02:03,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 12:02:03,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:02:03,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 12:02:03,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-11-09 12:02:03,690 INFO L87 Difference]: Start difference. First operand 95 states and 233 transitions. Second operand 11 states. [2020-11-09 12:02:04,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:02:04,078 INFO L93 Difference]: Finished difference Result 132 states and 316 transitions. [2020-11-09 12:02:04,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-09 12:02:04,079 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-11-09 12:02:04,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:02:04,080 INFO L225 Difference]: With dead ends: 132 [2020-11-09 12:02:04,080 INFO L226 Difference]: Without dead ends: 127 [2020-11-09 12:02:04,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-11-09 12:02:04,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-11-09 12:02:04,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 97. [2020-11-09 12:02:04,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-09 12:02:04,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 241 transitions. [2020-11-09 12:02:04,086 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 241 transitions. Word has length 11 [2020-11-09 12:02:04,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:02:04,086 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 241 transitions. [2020-11-09 12:02:04,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 12:02:04,086 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 241 transitions. [2020-11-09 12:02:04,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 12:02:04,087 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:02:04,087 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:02:04,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-09 12:02:04,300 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:02:04,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:02:04,301 INFO L82 PathProgramCache]: Analyzing trace with hash 2023921849, now seen corresponding path program 7 times [2020-11-09 12:02:04,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:02:04,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946231387] [2020-11-09 12:02:04,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:02:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:04,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:04,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946231387] [2020-11-09 12:02:04,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737542654] [2020-11-09 12:02:04,393 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 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 [2020-11-09 12:02:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:04,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 12:02:04,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:02:04,530 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:02:04,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:04,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:02:04,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-09 12:02:04,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801795221] [2020-11-09 12:02:04,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 12:02:04,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:02:04,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 12:02:04,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-11-09 12:02:04,545 INFO L87 Difference]: Start difference. First operand 97 states and 241 transitions. Second operand 11 states. [2020-11-09 12:02:04,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:02:04,960 INFO L93 Difference]: Finished difference Result 140 states and 330 transitions. [2020-11-09 12:02:04,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 12:02:04,968 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-11-09 12:02:04,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:02:04,969 INFO L225 Difference]: With dead ends: 140 [2020-11-09 12:02:04,969 INFO L226 Difference]: Without dead ends: 135 [2020-11-09 12:02:04,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-11-09 12:02:04,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-11-09 12:02:04,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 96. [2020-11-09 12:02:04,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-09 12:02:04,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 236 transitions. [2020-11-09 12:02:04,975 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 236 transitions. Word has length 11 [2020-11-09 12:02:04,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:02:04,976 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 236 transitions. [2020-11-09 12:02:04,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 12:02:04,976 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 236 transitions. [2020-11-09 12:02:04,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 12:02:04,977 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:02:04,977 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:02:05,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:02:05,190 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:02:05,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:02:05,191 INFO L82 PathProgramCache]: Analyzing trace with hash 2023950679, now seen corresponding path program 8 times [2020-11-09 12:02:05,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:02:05,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514391430] [2020-11-09 12:02:05,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:02:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:05,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:05,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514391430] [2020-11-09 12:02:05,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625717979] [2020-11-09 12:02:05,271 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 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 [2020-11-09 12:02:05,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 12:02:05,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:02:05,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:02:05,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:02:05,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:05,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:02:05,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-09 12:02:05,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585600324] [2020-11-09 12:02:05,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 12:02:05,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:02:05,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 12:02:05,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-11-09 12:02:05,420 INFO L87 Difference]: Start difference. First operand 96 states and 236 transitions. Second operand 11 states. [2020-11-09 12:02:05,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:02:05,761 INFO L93 Difference]: Finished difference Result 139 states and 327 transitions. [2020-11-09 12:02:05,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-09 12:02:05,763 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-11-09 12:02:05,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:02:05,765 INFO L225 Difference]: With dead ends: 139 [2020-11-09 12:02:05,765 INFO L226 Difference]: Without dead ends: 134 [2020-11-09 12:02:05,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2020-11-09 12:02:05,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-11-09 12:02:05,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 98. [2020-11-09 12:02:05,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-09 12:02:05,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-11-09 12:02:05,775 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-11-09 12:02:05,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:02:05,775 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-11-09 12:02:05,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 12:02:05,775 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-11-09 12:02:05,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 12:02:05,776 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:02:05,776 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:02:05,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-09 12:02:05,988 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:02:05,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:02:05,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1984724146, now seen corresponding path program 4 times [2020-11-09 12:02:05,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:02:05,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873965407] [2020-11-09 12:02:05,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:02:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:06,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873965407] [2020-11-09 12:02:06,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489168404] [2020-11-09 12:02:06,110 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 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 [2020-11-09 12:02:06,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 12:02:06,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:02:06,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 12:02:06,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:02:06,287 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:02:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:06,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:02:06,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-09 12:02:06,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804875615] [2020-11-09 12:02:06,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 12:02:06,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:02:06,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 12:02:06,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-11-09 12:02:06,301 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 13 states. [2020-11-09 12:02:06,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:02:06,569 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-11-09 12:02:06,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 12:02:06,570 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-11-09 12:02:06,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:02:06,571 INFO L225 Difference]: With dead ends: 143 [2020-11-09 12:02:06,571 INFO L226 Difference]: Without dead ends: 138 [2020-11-09 12:02:06,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-11-09 12:02:06,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-09 12:02:06,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-11-09 12:02:06,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-11-09 12:02:06,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-11-09 12:02:06,579 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-11-09 12:02:06,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:02:06,579 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-11-09 12:02:06,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 12:02:06,579 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-11-09 12:02:06,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 12:02:06,580 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:02:06,580 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:02:06,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-09 12:02:06,792 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:02:06,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:02:06,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1071251737, now seen corresponding path program 4 times [2020-11-09 12:02:06,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:02:06,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873706322] [2020-11-09 12:02:06,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:02:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:06,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873706322] [2020-11-09 12:02:06,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432291976] [2020-11-09 12:02:06,876 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 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 [2020-11-09 12:02:06,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 12:02:06,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:02:06,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 12:02:06,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:02:07,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:02:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:07,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:02:07,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-09 12:02:07,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735877340] [2020-11-09 12:02:07,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 12:02:07,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:02:07,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 12:02:07,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-11-09 12:02:07,084 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-11-09 12:02:07,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:02:07,280 INFO L93 Difference]: Finished difference Result 147 states and 350 transitions. [2020-11-09 12:02:07,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 12:02:07,284 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-11-09 12:02:07,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:02:07,285 INFO L225 Difference]: With dead ends: 147 [2020-11-09 12:02:07,287 INFO L226 Difference]: Without dead ends: 141 [2020-11-09 12:02:07,288 INFO L677 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 [2020-11-09 12:02:07,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-11-09 12:02:07,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2020-11-09 12:02:07,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-11-09 12:02:07,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-11-09 12:02:07,295 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-11-09 12:02:07,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:02:07,295 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-11-09 12:02:07,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 12:02:07,295 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-11-09 12:02:07,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 12:02:07,297 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:02:07,297 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:02:07,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-09 12:02:07,498 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:02:07,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:02:07,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1711561906, now seen corresponding path program 9 times [2020-11-09 12:02:07,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:02:07,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408235702] [2020-11-09 12:02:07,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:02:07,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:07,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408235702] [2020-11-09 12:02:07,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705718739] [2020-11-09 12:02:07,583 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 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 [2020-11-09 12:02:07,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-09 12:02:07,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:02:07,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 12:02:07,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:02:07,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:02:07,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:07,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:02:07,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-09 12:02:07,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752390106] [2020-11-09 12:02:07,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 12:02:07,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:02:07,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 12:02:07,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-11-09 12:02:07,773 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-11-09 12:02:08,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:02:08,126 INFO L93 Difference]: Finished difference Result 152 states and 363 transitions. [2020-11-09 12:02:08,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 12:02:08,126 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-11-09 12:02:08,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:02:08,128 INFO L225 Difference]: With dead ends: 152 [2020-11-09 12:02:08,128 INFO L226 Difference]: Without dead ends: 147 [2020-11-09 12:02:08,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2020-11-09 12:02:08,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-11-09 12:02:08,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2020-11-09 12:02:08,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-09 12:02:08,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 277 transitions. [2020-11-09 12:02:08,134 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 277 transitions. Word has length 12 [2020-11-09 12:02:08,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:02:08,134 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 277 transitions. [2020-11-09 12:02:08,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 12:02:08,134 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 277 transitions. [2020-11-09 12:02:08,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 12:02:08,135 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:02:08,135 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:02:08,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-09 12:02:08,347 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:02:08,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:02:08,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1711533076, now seen corresponding path program 10 times [2020-11-09 12:02:08,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:02:08,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813923031] [2020-11-09 12:02:08,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:02:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:08,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813923031] [2020-11-09 12:02:08,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7025547] [2020-11-09 12:02:08,441 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 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 [2020-11-09 12:02:08,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 12:02:08,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:02:08,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 12:02:08,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:02:08,659 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:02:11,891 WARN L194 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 20 [2020-11-09 12:02:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:11,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:02:11,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-11-09 12:02:11,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279082925] [2020-11-09 12:02:11,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 12:02:11,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:02:11,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 12:02:11,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=126, Unknown=1, NotChecked=0, Total=182 [2020-11-09 12:02:11,894 INFO L87 Difference]: Start difference. First operand 112 states and 277 transitions. Second operand 14 states. [2020-11-09 12:02:16,191 WARN L194 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-11-09 12:02:22,665 WARN L194 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-11-09 12:02:36,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:02:36,409 INFO L93 Difference]: Finished difference Result 168 states and 398 transitions. [2020-11-09 12:02:36,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-09 12:02:36,443 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-11-09 12:02:36,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:02:36,444 INFO L225 Difference]: With dead ends: 168 [2020-11-09 12:02:36,444 INFO L226 Difference]: Without dead ends: 163 [2020-11-09 12:02:36,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=208, Invalid=440, Unknown=2, NotChecked=0, Total=650 [2020-11-09 12:02:36,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-09 12:02:36,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 112. [2020-11-09 12:02:36,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-09 12:02:36,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 279 transitions. [2020-11-09 12:02:36,455 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 279 transitions. Word has length 12 [2020-11-09 12:02:36,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:02:36,455 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 279 transitions. [2020-11-09 12:02:36,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 12:02:36,456 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 279 transitions. [2020-11-09 12:02:36,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 12:02:36,456 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:02:36,456 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:02:36,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:02:36,668 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:02:36,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:02:36,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1711532115, now seen corresponding path program 11 times [2020-11-09 12:02:36,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:02:36,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138100709] [2020-11-09 12:02:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:02:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:36,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138100709] [2020-11-09 12:02:36,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347105488] [2020-11-09 12:02:36,763 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 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 [2020-11-09 12:02:36,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 12:02:36,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:02:36,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 12:02:36,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:02:36,966 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:02:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:36,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:02:36,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-09 12:02:36,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472807817] [2020-11-09 12:02:36,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 12:02:36,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:02:36,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 12:02:36,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-11-09 12:02:36,981 INFO L87 Difference]: Start difference. First operand 112 states and 279 transitions. Second operand 13 states. [2020-11-09 12:02:37,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:02:37,342 INFO L93 Difference]: Finished difference Result 148 states and 355 transitions. [2020-11-09 12:02:37,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 12:02:37,343 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-11-09 12:02:37,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:02:37,345 INFO L225 Difference]: With dead ends: 148 [2020-11-09 12:02:37,345 INFO L226 Difference]: Without dead ends: 143 [2020-11-09 12:02:37,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2020-11-09 12:02:37,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-11-09 12:02:37,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2020-11-09 12:02:37,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-11-09 12:02:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 274 transitions. [2020-11-09 12:02:37,352 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 274 transitions. Word has length 12 [2020-11-09 12:02:37,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:02:37,352 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 274 transitions. [2020-11-09 12:02:37,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 12:02:37,352 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 274 transitions. [2020-11-09 12:02:37,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 12:02:37,355 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:02:37,356 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:02:37,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:02:37,557 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:02:37,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:02:37,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1710639346, now seen corresponding path program 12 times [2020-11-09 12:02:37,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:02:37,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963502280] [2020-11-09 12:02:37,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:02:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:37,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963502280] [2020-11-09 12:02:37,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80098749] [2020-11-09 12:02:37,675 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 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 [2020-11-09 12:02:37,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-09 12:02:37,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:02:37,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 12:02:37,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:02:37,841 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:02:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:37,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:02:37,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-09 12:02:37,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813532755] [2020-11-09 12:02:37,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 12:02:37,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:02:37,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 12:02:37,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-11-09 12:02:37,861 INFO L87 Difference]: Start difference. First operand 111 states and 274 transitions. Second operand 13 states. [2020-11-09 12:02:38,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:02:38,372 INFO L93 Difference]: Finished difference Result 167 states and 399 transitions. [2020-11-09 12:02:38,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 12:02:38,374 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-11-09 12:02:38,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:02:38,376 INFO L225 Difference]: With dead ends: 167 [2020-11-09 12:02:38,376 INFO L226 Difference]: Without dead ends: 162 [2020-11-09 12:02:38,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2020-11-09 12:02:38,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-11-09 12:02:38,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2020-11-09 12:02:38,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-09 12:02:38,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 287 transitions. [2020-11-09 12:02:38,382 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 287 transitions. Word has length 12 [2020-11-09 12:02:38,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:02:38,382 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 287 transitions. [2020-11-09 12:02:38,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 12:02:38,382 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 287 transitions. [2020-11-09 12:02:38,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 12:02:38,383 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:02:38,383 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:02:38,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:02:38,596 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:02:38,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:02:38,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1710638385, now seen corresponding path program 13 times [2020-11-09 12:02:38,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:02:38,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678399607] [2020-11-09 12:02:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:02:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:38,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:38,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678399607] [2020-11-09 12:02:38,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435787053] [2020-11-09 12:02:38,720 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 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 [2020-11-09 12:02:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:38,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 12:02:38,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:02:38,891 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:02:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:38,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:02:38,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-09 12:02:38,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305450359] [2020-11-09 12:02:38,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 12:02:38,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:02:38,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 12:02:38,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-11-09 12:02:38,906 INFO L87 Difference]: Start difference. First operand 114 states and 287 transitions. Second operand 13 states. [2020-11-09 12:02:39,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:02:39,423 INFO L93 Difference]: Finished difference Result 177 states and 423 transitions. [2020-11-09 12:02:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-09 12:02:39,423 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-11-09 12:02:39,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:02:39,425 INFO L225 Difference]: With dead ends: 177 [2020-11-09 12:02:39,425 INFO L226 Difference]: Without dead ends: 169 [2020-11-09 12:02:39,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2020-11-09 12:02:39,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-11-09 12:02:39,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 114. [2020-11-09 12:02:39,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-09 12:02:39,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 283 transitions. [2020-11-09 12:02:39,432 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 283 transitions. Word has length 12 [2020-11-09 12:02:39,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:02:39,432 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 283 transitions. [2020-11-09 12:02:39,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 12:02:39,432 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 283 transitions. [2020-11-09 12:02:39,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 12:02:39,433 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:02:39,433 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:02:39,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-09 12:02:39,646 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:02:39,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:02:39,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1710609555, now seen corresponding path program 14 times [2020-11-09 12:02:39,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:02:39,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137293961] [2020-11-09 12:02:39,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:02:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:39,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:39,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137293961] [2020-11-09 12:02:39,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402070742] [2020-11-09 12:02:39,732 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 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 [2020-11-09 12:02:39,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 12:02:39,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:02:39,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 12:02:39,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:02:39,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:02:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:39,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:02:39,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-09 12:02:39,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60182835] [2020-11-09 12:02:39,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 12:02:39,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:02:39,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 12:02:39,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-11-09 12:02:39,989 INFO L87 Difference]: Start difference. First operand 114 states and 283 transitions. Second operand 13 states. [2020-11-09 12:02:40,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:02:40,527 INFO L93 Difference]: Finished difference Result 165 states and 395 transitions. [2020-11-09 12:02:40,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 12:02:40,528 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-11-09 12:02:40,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:02:40,530 INFO L225 Difference]: With dead ends: 165 [2020-11-09 12:02:40,530 INFO L226 Difference]: Without dead ends: 160 [2020-11-09 12:02:40,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-11-09 12:02:40,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-11-09 12:02:40,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 112. [2020-11-09 12:02:40,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-09 12:02:40,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-11-09 12:02:40,536 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 12 [2020-11-09 12:02:40,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:02:40,537 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-11-09 12:02:40,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 12:02:40,537 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-11-09 12:02:40,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 12:02:40,537 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:02:40,538 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:02:40,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-09 12:02:40,741 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:02:40,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:02:40,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1682933716, now seen corresponding path program 15 times [2020-11-09 12:02:40,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:02:40,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429370364] [2020-11-09 12:02:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:02:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:40,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:40,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429370364] [2020-11-09 12:02:40,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583957349] [2020-11-09 12:02:40,829 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 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 [2020-11-09 12:02:40,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-09 12:02:40,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:02:40,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 12:02:40,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:02:41,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:02:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:41,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:02:41,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-09 12:02:41,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560810130] [2020-11-09 12:02:41,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 12:02:41,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:02:41,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 12:02:41,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-11-09 12:02:41,051 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-11-09 12:02:41,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:02:41,633 INFO L93 Difference]: Finished difference Result 163 states and 390 transitions. [2020-11-09 12:02:41,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-09 12:02:41,634 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-11-09 12:02:41,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:02:41,635 INFO L225 Difference]: With dead ends: 163 [2020-11-09 12:02:41,635 INFO L226 Difference]: Without dead ends: 158 [2020-11-09 12:02:41,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=547, Unknown=0, NotChecked=0, Total=812 [2020-11-09 12:02:41,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-11-09 12:02:41,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 116. [2020-11-09 12:02:41,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-11-09 12:02:41,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 291 transitions. [2020-11-09 12:02:41,641 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 291 transitions. Word has length 12 [2020-11-09 12:02:41,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:02:41,641 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 291 transitions. [2020-11-09 12:02:41,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 12:02:41,641 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 291 transitions. [2020-11-09 12:02:41,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 12:02:41,642 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:02:41,642 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:02:41,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-09 12:02:41,852 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:02:41,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:02:41,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1682932755, now seen corresponding path program 16 times [2020-11-09 12:02:41,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:02:41,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775977799] [2020-11-09 12:02:41,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:02:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:41,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775977799] [2020-11-09 12:02:41,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429321867] [2020-11-09 12:02:41,941 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 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 [2020-11-09 12:02:42,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 12:02:42,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:02:42,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 12:02:42,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:02:42,122 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:02:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:42,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:02:42,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-09 12:02:42,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772595803] [2020-11-09 12:02:42,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 12:02:42,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:02:42,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 12:02:42,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-11-09 12:02:42,141 INFO L87 Difference]: Start difference. First operand 116 states and 291 transitions. Second operand 13 states. [2020-11-09 12:02:42,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:02:42,861 INFO L93 Difference]: Finished difference Result 194 states and 461 transitions. [2020-11-09 12:02:42,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-09 12:02:42,861 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-11-09 12:02:42,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:02:42,863 INFO L225 Difference]: With dead ends: 194 [2020-11-09 12:02:42,863 INFO L226 Difference]: Without dead ends: 186 [2020-11-09 12:02:42,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2020-11-09 12:02:42,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-11-09 12:02:42,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 115. [2020-11-09 12:02:42,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-11-09 12:02:42,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 286 transitions. [2020-11-09 12:02:42,869 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 286 transitions. Word has length 12 [2020-11-09 12:02:42,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:02:42,869 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 286 transitions. [2020-11-09 12:02:42,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 12:02:42,870 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 286 transitions. [2020-11-09 12:02:42,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 12:02:42,870 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:02:42,870 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:02:43,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-09 12:02:43,083 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:02:43,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:02:43,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1682903925, now seen corresponding path program 17 times [2020-11-09 12:02:43,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:02:43,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307231428] [2020-11-09 12:02:43,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:02:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:43,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307231428] [2020-11-09 12:02:43,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360294842] [2020-11-09 12:02:43,162 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 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 [2020-11-09 12:02:43,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 12:02:43,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:02:43,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 12:02:43,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:02:43,329 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:02:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:43,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:02:43,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-09 12:02:43,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812363763] [2020-11-09 12:02:43,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 12:02:43,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:02:43,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 12:02:43,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-11-09 12:02:43,343 INFO L87 Difference]: Start difference. First operand 115 states and 286 transitions. Second operand 13 states. [2020-11-09 12:02:44,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:02:44,015 INFO L93 Difference]: Finished difference Result 185 states and 441 transitions. [2020-11-09 12:02:44,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-09 12:02:44,020 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-11-09 12:02:44,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:02:44,022 INFO L225 Difference]: With dead ends: 185 [2020-11-09 12:02:44,022 INFO L226 Difference]: Without dead ends: 177 [2020-11-09 12:02:44,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2020-11-09 12:02:44,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-11-09 12:02:44,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 117. [2020-11-09 12:02:44,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-11-09 12:02:44,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 283 transitions. [2020-11-09 12:02:44,028 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 283 transitions. Word has length 12 [2020-11-09 12:02:44,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:02:44,029 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 283 transitions. [2020-11-09 12:02:44,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 12:02:44,029 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 283 transitions. [2020-11-09 12:02:44,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 12:02:44,030 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:02:44,030 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:02:44,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-09 12:02:44,244 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:02:44,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:02:44,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1682902964, now seen corresponding path program 18 times [2020-11-09 12:02:44,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:02:44,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555646369] [2020-11-09 12:02:44,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:02:44,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:44,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555646369] [2020-11-09 12:02:44,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338010798] [2020-11-09 12:02:44,338 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 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 [2020-11-09 12:02:44,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-09 12:02:44,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:02:44,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 12:02:44,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:02:44,508 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:02:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:44,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:02:44,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-09 12:02:44,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963805442] [2020-11-09 12:02:44,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 12:02:44,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:02:44,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 12:02:44,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-11-09 12:02:44,523 INFO L87 Difference]: Start difference. First operand 117 states and 283 transitions. Second operand 13 states. [2020-11-09 12:02:45,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:02:45,115 INFO L93 Difference]: Finished difference Result 167 states and 392 transitions. [2020-11-09 12:02:45,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-09 12:02:45,118 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-11-09 12:02:45,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:02:45,120 INFO L225 Difference]: With dead ends: 167 [2020-11-09 12:02:45,120 INFO L226 Difference]: Without dead ends: 162 [2020-11-09 12:02:45,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=649, Unknown=0, NotChecked=0, Total=930 [2020-11-09 12:02:45,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-11-09 12:02:45,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2020-11-09 12:02:45,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-09 12:02:45,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-11-09 12:02:45,126 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-11-09 12:02:45,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:02:45,126 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-11-09 12:02:45,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 12:02:45,126 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-11-09 12:02:45,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 12:02:45,127 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:02:45,127 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:02:45,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:02:45,339 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:02:45,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:02:45,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1396877225, now seen corresponding path program 5 times [2020-11-09 12:02:45,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:02:45,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659285470] [2020-11-09 12:02:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:02:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:45,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659285470] [2020-11-09 12:02:45,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572809718] [2020-11-09 12:02:45,441 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 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 [2020-11-09 12:02:45,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-09 12:02:45,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:02:45,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:02:45,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:02:45,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:02:45,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:45,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:02:45,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-09 12:02:45,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233070191] [2020-11-09 12:02:45,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 12:02:45,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:02:45,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 12:02:45,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-11-09 12:02:45,646 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 15 states. [2020-11-09 12:02:46,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:02:46,049 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-11-09 12:02:46,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 12:02:46,053 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-11-09 12:02:46,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:02:46,054 INFO L225 Difference]: With dead ends: 164 [2020-11-09 12:02:46,054 INFO L226 Difference]: Without dead ends: 159 [2020-11-09 12:02:46,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2020-11-09 12:02:46,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-11-09 12:02:46,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-11-09 12:02:46,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-11-09 12:02:46,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-11-09 12:02:46,060 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-11-09 12:02:46,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:02:46,060 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-11-09 12:02:46,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 12:02:46,060 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-11-09 12:02:46,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 12:02:46,061 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:02:46,061 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:02:46,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-09 12:02:46,275 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:02:46,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:02:46,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1150962717, now seen corresponding path program 5 times [2020-11-09 12:02:46,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:02:46,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322289226] [2020-11-09 12:02:46,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:02:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:46,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:46,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322289226] [2020-11-09 12:02:46,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241412761] [2020-11-09 12:02:46,368 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 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 [2020-11-09 12:02:46,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-09 12:02:46,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:02:46,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:02:46,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:02:46,586 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:02:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:46,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:02:46,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-09 12:02:46,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140813631] [2020-11-09 12:02:46,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 12:02:46,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:02:46,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 12:02:46,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-11-09 12:02:46,606 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-11-09 12:02:46,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:02:46,834 INFO L93 Difference]: Finished difference Result 173 states and 412 transitions. [2020-11-09 12:02:46,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 12:02:46,835 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-11-09 12:02:46,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:02:46,836 INFO L225 Difference]: With dead ends: 173 [2020-11-09 12:02:46,837 INFO L226 Difference]: Without dead ends: 167 [2020-11-09 12:02:46,837 INFO L677 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 [2020-11-09 12:02:46,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-11-09 12:02:46,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 132. [2020-11-09 12:02:46,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-11-09 12:02:46,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-11-09 12:02:46,842 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-11-09 12:02:46,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:02:46,842 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-11-09 12:02:46,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 12:02:46,843 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-11-09 12:02:46,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 12:02:46,843 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:02:46,843 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:02:47,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-09 12:02:47,044 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:02:47,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:02:47,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1518812168, now seen corresponding path program 19 times [2020-11-09 12:02:47,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:02:47,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826669693] [2020-11-09 12:02:47,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:02:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:47,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826669693] [2020-11-09 12:02:47,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726671099] [2020-11-09 12:02:47,145 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 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 [2020-11-09 12:02:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:47,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:02:47,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:02:47,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:02:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:47,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:02:47,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-09 12:02:47,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095982094] [2020-11-09 12:02:47,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 12:02:47,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:02:47,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 12:02:47,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-11-09 12:02:47,381 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-11-09 12:02:47,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:02:47,816 INFO L93 Difference]: Finished difference Result 183 states and 437 transitions. [2020-11-09 12:02:47,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 12:02:47,818 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-11-09 12:02:47,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:02:47,820 INFO L225 Difference]: With dead ends: 183 [2020-11-09 12:02:47,820 INFO L226 Difference]: Without dead ends: 178 [2020-11-09 12:02:47,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-11-09 12:02:47,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-09 12:02:47,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 131. [2020-11-09 12:02:47,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-11-09 12:02:47,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 327 transitions. [2020-11-09 12:02:47,826 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 327 transitions. Word has length 13 [2020-11-09 12:02:47,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:02:47,827 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 327 transitions. [2020-11-09 12:02:47,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 12:02:47,827 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 327 transitions. [2020-11-09 12:02:47,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 12:02:47,827 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:02:47,828 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:02:48,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:02:48,042 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:02:48,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:02:48,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1518783338, now seen corresponding path program 20 times [2020-11-09 12:02:48,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:02:48,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399099182] [2020-11-09 12:02:48,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:02:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:02:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:48,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399099182] [2020-11-09 12:02:48,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652578948] [2020-11-09 12:02:48,138 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 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 [2020-11-09 12:02:48,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 12:02:48,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:02:48,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:02:48,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:02:48,358 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:02:52,517 WARN L194 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 20 [2020-11-09 12:02:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:02:52,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:02:52,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-11-09 12:02:52,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033534231] [2020-11-09 12:02:52,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 12:02:52,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:02:52,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 12:02:52,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=167, Unknown=1, NotChecked=0, Total=240 [2020-11-09 12:02:52,521 INFO L87 Difference]: Start difference. First operand 131 states and 327 transitions. Second operand 16 states. [2020-11-09 12:03:11,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:03:11,379 INFO L93 Difference]: Finished difference Result 204 states and 484 transitions. [2020-11-09 12:03:11,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 12:03:11,413 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-11-09 12:03:11,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:03:11,415 INFO L225 Difference]: With dead ends: 204 [2020-11-09 12:03:11,415 INFO L226 Difference]: Without dead ends: 199 [2020-11-09 12:03:11,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=275, Invalid=593, Unknown=2, NotChecked=0, Total=870 [2020-11-09 12:03:11,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-09 12:03:11,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 131. [2020-11-09 12:03:11,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-11-09 12:03:11,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 329 transitions. [2020-11-09 12:03:11,421 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 329 transitions. Word has length 13 [2020-11-09 12:03:11,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:03:11,421 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 329 transitions. [2020-11-09 12:03:11,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 12:03:11,422 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 329 transitions. [2020-11-09 12:03:11,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 12:03:11,422 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:03:11,422 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:03:11,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:03:11,636 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:03:11,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:03:11,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1518782377, now seen corresponding path program 21 times [2020-11-09 12:03:11,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:03:11,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252824654] [2020-11-09 12:03:11,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:03:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:11,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252824654] [2020-11-09 12:03:11,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975185949] [2020-11-09 12:03:11,732 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 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 [2020-11-09 12:03:11,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-09 12:03:11,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:03:11,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:03:11,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:03:11,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:03:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:11,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:03:11,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-09 12:03:11,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076492735] [2020-11-09 12:03:11,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 12:03:11,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:03:11,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 12:03:11,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-11-09 12:03:11,946 INFO L87 Difference]: Start difference. First operand 131 states and 329 transitions. Second operand 15 states. [2020-11-09 12:03:12,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:03:12,413 INFO L93 Difference]: Finished difference Result 184 states and 441 transitions. [2020-11-09 12:03:12,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 12:03:12,414 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-11-09 12:03:12,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:03:12,416 INFO L225 Difference]: With dead ends: 184 [2020-11-09 12:03:12,416 INFO L226 Difference]: Without dead ends: 179 [2020-11-09 12:03:12,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2020-11-09 12:03:12,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-09 12:03:12,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 129. [2020-11-09 12:03:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-11-09 12:03:12,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 319 transitions. [2020-11-09 12:03:12,421 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 319 transitions. Word has length 13 [2020-11-09 12:03:12,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:03:12,422 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 319 transitions. [2020-11-09 12:03:12,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 12:03:12,422 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 319 transitions. [2020-11-09 12:03:12,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 12:03:12,422 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:03:12,423 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:03:12,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-11-09 12:03:12,634 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:03:12,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:03:12,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1517889608, now seen corresponding path program 22 times [2020-11-09 12:03:12,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:03:12,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870435397] [2020-11-09 12:03:12,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:03:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:12,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870435397] [2020-11-09 12:03:12,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435254104] [2020-11-09 12:03:12,753 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 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 [2020-11-09 12:03:12,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 12:03:12,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:03:12,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:03:12,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:03:13,002 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:03:13,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:13,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:03:13,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-09 12:03:13,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636698343] [2020-11-09 12:03:13,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 12:03:13,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:03:13,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 12:03:13,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-11-09 12:03:13,056 INFO L87 Difference]: Start difference. First operand 129 states and 319 transitions. Second operand 15 states. [2020-11-09 12:03:13,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:03:13,758 INFO L93 Difference]: Finished difference Result 207 states and 492 transitions. [2020-11-09 12:03:13,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-09 12:03:13,759 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-11-09 12:03:13,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:03:13,760 INFO L225 Difference]: With dead ends: 207 [2020-11-09 12:03:13,760 INFO L226 Difference]: Without dead ends: 202 [2020-11-09 12:03:13,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2020-11-09 12:03:13,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-11-09 12:03:13,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 132. [2020-11-09 12:03:13,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-11-09 12:03:13,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-11-09 12:03:13,768 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 13 [2020-11-09 12:03:13,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:03:13,768 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-11-09 12:03:13,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 12:03:13,768 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-11-09 12:03:13,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 12:03:13,769 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:03:13,769 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:03:13,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:03:13,970 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:03:13,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:03:13,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1517888647, now seen corresponding path program 23 times [2020-11-09 12:03:13,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:03:13,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111679036] [2020-11-09 12:03:13,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:03:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:14,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111679036] [2020-11-09 12:03:14,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826636246] [2020-11-09 12:03:14,065 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 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 [2020-11-09 12:03:14,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 12:03:14,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:03:14,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:03:14,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:03:14,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:03:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:14,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:03:14,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-09 12:03:14,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635611676] [2020-11-09 12:03:14,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 12:03:14,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:03:14,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 12:03:14,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-11-09 12:03:14,368 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-11-09 12:03:15,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:03:15,115 INFO L93 Difference]: Finished difference Result 215 states and 517 transitions. [2020-11-09 12:03:15,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 12:03:15,116 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-11-09 12:03:15,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:03:15,118 INFO L225 Difference]: With dead ends: 215 [2020-11-09 12:03:15,118 INFO L226 Difference]: Without dead ends: 207 [2020-11-09 12:03:15,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=309, Invalid=683, Unknown=0, NotChecked=0, Total=992 [2020-11-09 12:03:15,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-11-09 12:03:15,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 131. [2020-11-09 12:03:15,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-11-09 12:03:15,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 327 transitions. [2020-11-09 12:03:15,126 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 327 transitions. Word has length 13 [2020-11-09 12:03:15,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:03:15,126 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 327 transitions. [2020-11-09 12:03:15,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 12:03:15,127 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 327 transitions. [2020-11-09 12:03:15,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 12:03:15,127 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:03:15,127 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:03:15,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-09 12:03:15,342 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:03:15,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:03:15,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1517859817, now seen corresponding path program 24 times [2020-11-09 12:03:15,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:03:15,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535447698] [2020-11-09 12:03:15,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:03:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:15,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535447698] [2020-11-09 12:03:15,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986458063] [2020-11-09 12:03:15,444 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 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 [2020-11-09 12:03:15,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-09 12:03:15,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:03:15,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:03:15,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:03:15,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:03:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:15,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:03:15,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-09 12:03:15,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448275968] [2020-11-09 12:03:15,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 12:03:15,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:03:15,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 12:03:15,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-11-09 12:03:15,803 INFO L87 Difference]: Start difference. First operand 131 states and 327 transitions. Second operand 15 states. [2020-11-09 12:03:16,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:03:16,504 INFO L93 Difference]: Finished difference Result 204 states and 491 transitions. [2020-11-09 12:03:16,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-09 12:03:16,505 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-11-09 12:03:16,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:03:16,506 INFO L225 Difference]: With dead ends: 204 [2020-11-09 12:03:16,506 INFO L226 Difference]: Without dead ends: 199 [2020-11-09 12:03:16,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=277, Invalid=593, Unknown=0, NotChecked=0, Total=870 [2020-11-09 12:03:16,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-09 12:03:16,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 128. [2020-11-09 12:03:16,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-11-09 12:03:16,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 316 transitions. [2020-11-09 12:03:16,512 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 316 transitions. Word has length 13 [2020-11-09 12:03:16,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:03:16,512 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 316 transitions. [2020-11-09 12:03:16,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 12:03:16,512 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 316 transitions. [2020-11-09 12:03:16,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 12:03:16,513 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:03:16,513 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:03:16,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:03:16,724 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:03:16,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:03:16,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1490183978, now seen corresponding path program 25 times [2020-11-09 12:03:16,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:03:16,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413453582] [2020-11-09 12:03:16,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:03:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:16,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413453582] [2020-11-09 12:03:16,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569034303] [2020-11-09 12:03:16,817 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 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 [2020-11-09 12:03:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:16,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:03:16,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:03:17,023 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:03:17,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:17,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:03:17,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-09 12:03:17,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974335761] [2020-11-09 12:03:17,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 12:03:17,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:03:17,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 12:03:17,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-11-09 12:03:17,039 INFO L87 Difference]: Start difference. First operand 128 states and 316 transitions. Second operand 15 states. [2020-11-09 12:03:17,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:03:17,690 INFO L93 Difference]: Finished difference Result 203 states and 485 transitions. [2020-11-09 12:03:17,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 12:03:17,691 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-11-09 12:03:17,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:03:17,693 INFO L225 Difference]: With dead ends: 203 [2020-11-09 12:03:17,693 INFO L226 Difference]: Without dead ends: 198 [2020-11-09 12:03:17,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 12:03:17,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-11-09 12:03:17,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 133. [2020-11-09 12:03:17,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-11-09 12:03:17,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 337 transitions. [2020-11-09 12:03:17,700 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 337 transitions. Word has length 13 [2020-11-09 12:03:17,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:03:17,701 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 337 transitions. [2020-11-09 12:03:17,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 12:03:17,701 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 337 transitions. [2020-11-09 12:03:17,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 12:03:17,701 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:03:17,702 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:03:17,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-09 12:03:17,912 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:03:17,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:03:17,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1490183017, now seen corresponding path program 26 times [2020-11-09 12:03:17,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:03:17,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790546584] [2020-11-09 12:03:17,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:03:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:18,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790546584] [2020-11-09 12:03:18,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468007589] [2020-11-09 12:03:18,007 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 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 [2020-11-09 12:03:18,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 12:03:18,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:03:18,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:03:18,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:03:18,221 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:03:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:18,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:03:18,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-09 12:03:18,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196224887] [2020-11-09 12:03:18,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 12:03:18,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:03:18,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 12:03:18,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-11-09 12:03:18,237 INFO L87 Difference]: Start difference. First operand 133 states and 337 transitions. Second operand 15 states. [2020-11-09 12:03:18,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:03:18,939 INFO L93 Difference]: Finished difference Result 204 states and 494 transitions. [2020-11-09 12:03:18,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-09 12:03:18,940 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-11-09 12:03:18,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:03:18,941 INFO L225 Difference]: With dead ends: 204 [2020-11-09 12:03:18,941 INFO L226 Difference]: Without dead ends: 199 [2020-11-09 12:03:18,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2020-11-09 12:03:18,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-09 12:03:18,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 132. [2020-11-09 12:03:18,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-11-09 12:03:18,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-11-09 12:03:18,947 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 13 [2020-11-09 12:03:18,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:03:18,947 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-11-09 12:03:18,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 12:03:18,947 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-11-09 12:03:18,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 12:03:18,948 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:03:18,948 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:03:19,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-09 12:03:19,160 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:03:19,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:03:19,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1490154187, now seen corresponding path program 27 times [2020-11-09 12:03:19,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:03:19,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475388873] [2020-11-09 12:03:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:03:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:19,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475388873] [2020-11-09 12:03:19,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27919777] [2020-11-09 12:03:19,253 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 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 [2020-11-09 12:03:19,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-09 12:03:19,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:03:19,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:03:19,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:03:19,450 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:03:19,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:19,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:03:19,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-09 12:03:19,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833869564] [2020-11-09 12:03:19,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 12:03:19,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:03:19,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 12:03:19,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-11-09 12:03:19,469 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-11-09 12:03:20,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:03:20,218 INFO L93 Difference]: Finished difference Result 221 states and 533 transitions. [2020-11-09 12:03:20,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 12:03:20,225 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-11-09 12:03:20,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:03:20,227 INFO L225 Difference]: With dead ends: 221 [2020-11-09 12:03:20,227 INFO L226 Difference]: Without dead ends: 213 [2020-11-09 12:03:20,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 12:03:20,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-11-09 12:03:20,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 132. [2020-11-09 12:03:20,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-11-09 12:03:20,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 336 transitions. [2020-11-09 12:03:20,234 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 336 transitions. Word has length 13 [2020-11-09 12:03:20,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:03:20,234 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 336 transitions. [2020-11-09 12:03:20,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 12:03:20,235 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 336 transitions. [2020-11-09 12:03:20,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 12:03:20,235 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:03:20,235 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:03:20,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-09 12:03:20,449 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:03:20,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:03:20,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1490153226, now seen corresponding path program 28 times [2020-11-09 12:03:20,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:03:20,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946338710] [2020-11-09 12:03:20,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:03:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:20,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946338710] [2020-11-09 12:03:20,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944275431] [2020-11-09 12:03:20,547 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 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 [2020-11-09 12:03:20,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 12:03:20,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:03:20,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:03:20,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:03:20,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:03:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:20,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:03:20,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-09 12:03:20,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890078382] [2020-11-09 12:03:20,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 12:03:20,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:03:20,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 12:03:20,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-11-09 12:03:20,773 INFO L87 Difference]: Start difference. First operand 132 states and 336 transitions. Second operand 15 states. [2020-11-09 12:03:21,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:03:21,489 INFO L93 Difference]: Finished difference Result 211 states and 510 transitions. [2020-11-09 12:03:21,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 12:03:21,490 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-11-09 12:03:21,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:03:21,493 INFO L225 Difference]: With dead ends: 211 [2020-11-09 12:03:21,493 INFO L226 Difference]: Without dead ends: 203 [2020-11-09 12:03:21,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=357, Invalid=833, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 12:03:21,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-11-09 12:03:21,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 132. [2020-11-09 12:03:21,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-11-09 12:03:21,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-11-09 12:03:21,502 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 13 [2020-11-09 12:03:21,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:03:21,502 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-11-09 12:03:21,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 12:03:21,503 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-11-09 12:03:21,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 12:03:21,503 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:03:21,503 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:03:21,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-09 12:03:21,716 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:03:21,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:03:21,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1489259496, now seen corresponding path program 29 times [2020-11-09 12:03:21,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:03:21,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705826699] [2020-11-09 12:03:21,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:03:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:21,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705826699] [2020-11-09 12:03:21,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377388373] [2020-11-09 12:03:21,816 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 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 [2020-11-09 12:03:21,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-09 12:03:21,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:03:21,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:03:21,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:03:22,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:03:22,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:22,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:03:22,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-09 12:03:22,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828418308] [2020-11-09 12:03:22,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 12:03:22,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:03:22,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 12:03:22,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-11-09 12:03:22,101 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-11-09 12:03:23,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:03:23,025 INFO L93 Difference]: Finished difference Result 210 states and 502 transitions. [2020-11-09 12:03:23,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 12:03:23,026 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-11-09 12:03:23,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:03:23,028 INFO L225 Difference]: With dead ends: 210 [2020-11-09 12:03:23,028 INFO L226 Difference]: Without dead ends: 205 [2020-11-09 12:03:23,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=358, Invalid=832, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 12:03:23,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-11-09 12:03:23,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 129. [2020-11-09 12:03:23,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-11-09 12:03:23,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 317 transitions. [2020-11-09 12:03:23,033 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 317 transitions. Word has length 13 [2020-11-09 12:03:23,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:03:23,033 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 317 transitions. [2020-11-09 12:03:23,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 12:03:23,033 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 317 transitions. [2020-11-09 12:03:23,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 12:03:23,034 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:03:23,034 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:03:23,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-09 12:03:23,236 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:03:23,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:03:23,238 INFO L82 PathProgramCache]: Analyzing trace with hash -631309448, now seen corresponding path program 30 times [2020-11-09 12:03:23,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:03:23,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252075438] [2020-11-09 12:03:23,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:03:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:23,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252075438] [2020-11-09 12:03:23,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929353088] [2020-11-09 12:03:23,340 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 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 [2020-11-09 12:03:23,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-09 12:03:23,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:03:23,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:03:23,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:03:23,588 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:03:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:23,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:03:23,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-09 12:03:23,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611613688] [2020-11-09 12:03:23,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 12:03:23,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:03:23,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 12:03:23,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-11-09 12:03:23,610 INFO L87 Difference]: Start difference. First operand 129 states and 317 transitions. Second operand 15 states. [2020-11-09 12:03:24,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:03:24,385 INFO L93 Difference]: Finished difference Result 194 states and 464 transitions. [2020-11-09 12:03:24,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-09 12:03:24,386 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-11-09 12:03:24,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:03:24,387 INFO L225 Difference]: With dead ends: 194 [2020-11-09 12:03:24,388 INFO L226 Difference]: Without dead ends: 189 [2020-11-09 12:03:24,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=382, Invalid=808, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 12:03:24,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-11-09 12:03:24,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 135. [2020-11-09 12:03:24,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-11-09 12:03:24,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 341 transitions. [2020-11-09 12:03:24,393 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 341 transitions. Word has length 13 [2020-11-09 12:03:24,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:03:24,393 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 341 transitions. [2020-11-09 12:03:24,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 12:03:24,393 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 341 transitions. [2020-11-09 12:03:24,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 12:03:24,394 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:03:24,394 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:03:24,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-11-09 12:03:24,606 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:03:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:03:24,606 INFO L82 PathProgramCache]: Analyzing trace with hash -631308487, now seen corresponding path program 31 times [2020-11-09 12:03:24,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:03:24,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774764298] [2020-11-09 12:03:24,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:03:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:24,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774764298] [2020-11-09 12:03:24,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918678624] [2020-11-09 12:03:24,708 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 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 [2020-11-09 12:03:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:24,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:03:24,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:03:24,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:03:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:24,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:03:24,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-09 12:03:24,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297893653] [2020-11-09 12:03:24,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 12:03:24,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:03:24,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 12:03:24,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-11-09 12:03:24,942 INFO L87 Difference]: Start difference. First operand 135 states and 341 transitions. Second operand 15 states. [2020-11-09 12:03:25,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:03:25,924 INFO L93 Difference]: Finished difference Result 219 states and 526 transitions. [2020-11-09 12:03:25,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-09 12:03:25,925 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-11-09 12:03:25,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:03:25,927 INFO L225 Difference]: With dead ends: 219 [2020-11-09 12:03:25,927 INFO L226 Difference]: Without dead ends: 214 [2020-11-09 12:03:25,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=413, Invalid=993, Unknown=0, NotChecked=0, Total=1406 [2020-11-09 12:03:25,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-11-09 12:03:25,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 134. [2020-11-09 12:03:25,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-11-09 12:03:25,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 336 transitions. [2020-11-09 12:03:25,932 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 336 transitions. Word has length 13 [2020-11-09 12:03:25,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:03:25,932 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 336 transitions. [2020-11-09 12:03:25,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 12:03:25,933 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 336 transitions. [2020-11-09 12:03:25,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 12:03:25,933 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:03:25,933 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:03:26,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-09 12:03:26,137 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:03:26,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:03:26,138 INFO L82 PathProgramCache]: Analyzing trace with hash -631279657, now seen corresponding path program 32 times [2020-11-09 12:03:26,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:03:26,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372531063] [2020-11-09 12:03:26,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:03:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:26,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372531063] [2020-11-09 12:03:26,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043865282] [2020-11-09 12:03:26,237 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 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 [2020-11-09 12:03:26,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 12:03:26,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:03:26,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:03:26,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:03:26,463 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:03:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:26,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:03:26,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-09 12:03:26,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439335273] [2020-11-09 12:03:26,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 12:03:26,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:03:26,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 12:03:26,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-11-09 12:03:26,544 INFO L87 Difference]: Start difference. First operand 134 states and 336 transitions. Second operand 15 states. [2020-11-09 12:03:27,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:03:27,715 INFO L93 Difference]: Finished difference Result 243 states and 583 transitions. [2020-11-09 12:03:27,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 12:03:27,716 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-11-09 12:03:27,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:03:27,717 INFO L225 Difference]: With dead ends: 243 [2020-11-09 12:03:27,718 INFO L226 Difference]: Without dead ends: 235 [2020-11-09 12:03:27,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=448, Invalid=1034, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 12:03:27,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-11-09 12:03:27,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 137. [2020-11-09 12:03:27,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-11-09 12:03:27,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 349 transitions. [2020-11-09 12:03:27,724 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 349 transitions. Word has length 13 [2020-11-09 12:03:27,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:03:27,724 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 349 transitions. [2020-11-09 12:03:27,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 12:03:27,724 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 349 transitions. [2020-11-09 12:03:27,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 12:03:27,725 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:03:27,725 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:03:27,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:03:27,937 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:03:27,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:03:27,937 INFO L82 PathProgramCache]: Analyzing trace with hash -631278696, now seen corresponding path program 33 times [2020-11-09 12:03:27,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:03:27,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705195563] [2020-11-09 12:03:27,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:03:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:28,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705195563] [2020-11-09 12:03:28,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109814228] [2020-11-09 12:03:28,039 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 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 [2020-11-09 12:03:28,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-09 12:03:28,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:03:28,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:03:28,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:03:28,243 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:03:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:28,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:03:28,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-09 12:03:28,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131672208] [2020-11-09 12:03:28,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 12:03:28,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:03:28,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 12:03:28,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-11-09 12:03:28,261 INFO L87 Difference]: Start difference. First operand 137 states and 349 transitions. Second operand 15 states. [2020-11-09 12:03:29,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:03:29,344 INFO L93 Difference]: Finished difference Result 240 states and 573 transitions. [2020-11-09 12:03:29,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 12:03:29,345 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-11-09 12:03:29,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:03:29,347 INFO L225 Difference]: With dead ends: 240 [2020-11-09 12:03:29,347 INFO L226 Difference]: Without dead ends: 232 [2020-11-09 12:03:29,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=426, Invalid=1056, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 12:03:29,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-11-09 12:03:29,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 135. [2020-11-09 12:03:29,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-11-09 12:03:29,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-11-09 12:03:29,352 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-11-09 12:03:29,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:03:29,353 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-11-09 12:03:29,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 12:03:29,353 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-11-09 12:03:29,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 12:03:29,354 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:03:29,354 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:03:29,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-11-09 12:03:29,555 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:03:29,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:03:29,555 INFO L82 PathProgramCache]: Analyzing trace with hash -630385927, now seen corresponding path program 34 times [2020-11-09 12:03:29,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:03:29,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354892086] [2020-11-09 12:03:29,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:03:29,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:29,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354892086] [2020-11-09 12:03:29,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593509825] [2020-11-09 12:03:29,661 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 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 [2020-11-09 12:03:29,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 12:03:29,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:03:29,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:03:29,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:03:29,849 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:03:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:29,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:03:29,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-09 12:03:29,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592182532] [2020-11-09 12:03:29,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 12:03:29,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:03:29,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 12:03:29,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-11-09 12:03:29,864 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-11-09 12:03:30,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:03:30,985 INFO L93 Difference]: Finished difference Result 234 states and 563 transitions. [2020-11-09 12:03:30,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 12:03:30,986 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-11-09 12:03:30,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:03:30,988 INFO L225 Difference]: With dead ends: 234 [2020-11-09 12:03:30,989 INFO L226 Difference]: Without dead ends: 226 [2020-11-09 12:03:30,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=520, Invalid=1286, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 12:03:30,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-11-09 12:03:30,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 135. [2020-11-09 12:03:30,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-11-09 12:03:30,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 341 transitions. [2020-11-09 12:03:30,994 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 341 transitions. Word has length 13 [2020-11-09 12:03:30,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:03:30,994 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 341 transitions. [2020-11-09 12:03:30,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 12:03:30,994 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 341 transitions. [2020-11-09 12:03:30,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 12:03:30,995 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:03:30,995 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:03:31,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:03:31,208 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:03:31,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:03:31,208 INFO L82 PathProgramCache]: Analyzing trace with hash -630384966, now seen corresponding path program 35 times [2020-11-09 12:03:31,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:03:31,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386627905] [2020-11-09 12:03:31,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:03:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:31,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386627905] [2020-11-09 12:03:31,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851401388] [2020-11-09 12:03:31,312 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 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 [2020-11-09 12:03:31,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-09 12:03:31,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:03:31,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:03:31,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:03:31,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:03:31,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:31,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:03:31,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-09 12:03:31,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109307793] [2020-11-09 12:03:31,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 12:03:31,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:03:31,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 12:03:31,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-11-09 12:03:31,518 INFO L87 Difference]: Start difference. First operand 135 states and 341 transitions. Second operand 15 states. [2020-11-09 12:03:32,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:03:32,468 INFO L93 Difference]: Finished difference Result 228 states and 552 transitions. [2020-11-09 12:03:32,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 12:03:32,470 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-11-09 12:03:32,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:03:32,472 INFO L225 Difference]: With dead ends: 228 [2020-11-09 12:03:32,472 INFO L226 Difference]: Without dead ends: 220 [2020-11-09 12:03:32,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2020-11-09 12:03:32,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-11-09 12:03:32,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 132. [2020-11-09 12:03:32,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-11-09 12:03:32,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 326 transitions. [2020-11-09 12:03:32,483 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 326 transitions. Word has length 13 [2020-11-09 12:03:32,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:03:32,483 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 326 transitions. [2020-11-09 12:03:32,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 12:03:32,483 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 326 transitions. [2020-11-09 12:03:32,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 12:03:32,486 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:03:32,486 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:03:32,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-11-09 12:03:32,700 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:03:32,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:03:32,701 INFO L82 PathProgramCache]: Analyzing trace with hash -630356136, now seen corresponding path program 36 times [2020-11-09 12:03:32,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:03:32,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343009214] [2020-11-09 12:03:32,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:03:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:32,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343009214] [2020-11-09 12:03:32,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335539498] [2020-11-09 12:03:32,806 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 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 [2020-11-09 12:03:32,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-09 12:03:32,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:03:32,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 12:03:32,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:03:32,997 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:03:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:33,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:03:33,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-09 12:03:33,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404599566] [2020-11-09 12:03:33,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 12:03:33,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:03:33,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 12:03:33,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-11-09 12:03:33,046 INFO L87 Difference]: Start difference. First operand 132 states and 326 transitions. Second operand 15 states. [2020-11-09 12:03:34,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:03:34,098 INFO L93 Difference]: Finished difference Result 224 states and 536 transitions. [2020-11-09 12:03:34,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 12:03:34,099 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-11-09 12:03:34,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:03:34,101 INFO L225 Difference]: With dead ends: 224 [2020-11-09 12:03:34,101 INFO L226 Difference]: Without dead ends: 216 [2020-11-09 12:03:34,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=403, Invalid=1003, Unknown=0, NotChecked=0, Total=1406 [2020-11-09 12:03:34,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-11-09 12:03:34,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 130. [2020-11-09 12:03:34,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-11-09 12:03:34,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-11-09 12:03:34,106 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-11-09 12:03:34,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:03:34,107 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-11-09 12:03:34,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 12:03:34,107 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-11-09 12:03:34,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 12:03:34,107 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:03:34,107 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:03:34,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:03:34,317 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:03:34,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:03:34,318 INFO L82 PathProgramCache]: Analyzing trace with hash -353491858, now seen corresponding path program 6 times [2020-11-09 12:03:34,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:03:34,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955733535] [2020-11-09 12:03:34,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:03:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:34,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955733535] [2020-11-09 12:03:34,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200174221] [2020-11-09 12:03:34,421 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 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 [2020-11-09 12:03:34,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-09 12:03:34,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:03:34,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 12:03:34,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:03:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:34,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-09 12:03:34,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2020-11-09 12:03:34,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987342267] [2020-11-09 12:03:34,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 12:03:34,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:03:34,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 12:03:34,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-11-09 12:03:34,582 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 8 states. [2020-11-09 12:03:34,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:03:34,616 INFO L93 Difference]: Finished difference Result 195 states and 513 transitions. [2020-11-09 12:03:34,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-09 12:03:34,617 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-11-09 12:03:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:03:34,618 INFO L225 Difference]: With dead ends: 195 [2020-11-09 12:03:34,618 INFO L226 Difference]: Without dead ends: 188 [2020-11-09 12:03:34,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-11-09 12:03:34,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-11-09 12:03:34,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-11-09 12:03:34,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-11-09 12:03:34,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 500 transitions. [2020-11-09 12:03:34,623 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 500 transitions. Word has length 13 [2020-11-09 12:03:34,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:03:34,623 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 500 transitions. [2020-11-09 12:03:34,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 12:03:34,623 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 500 transitions. [2020-11-09 12:03:34,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 12:03:34,624 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:03:34,624 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:03:34,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-09 12:03:34,834 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:03:34,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:03:34,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1320134055, now seen corresponding path program 6 times [2020-11-09 12:03:34,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:03:34,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741987381] [2020-11-09 12:03:34,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:03:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:34,945 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:34,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741987381] [2020-11-09 12:03:34,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096666959] [2020-11-09 12:03:34,945 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 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 [2020-11-09 12:03:35,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-09 12:03:35,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:03:35,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 12:03:35,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:03:35,208 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:03:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:35,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:03:35,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-09 12:03:35,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939365586] [2020-11-09 12:03:35,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 12:03:35,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:03:35,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 12:03:35,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-11-09 12:03:35,225 INFO L87 Difference]: Start difference. First operand 188 states and 500 transitions. Second operand 17 states. [2020-11-09 12:03:35,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:03:35,560 INFO L93 Difference]: Finished difference Result 252 states and 643 transitions. [2020-11-09 12:03:35,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-09 12:03:35,561 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-11-09 12:03:35,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:03:35,563 INFO L225 Difference]: With dead ends: 252 [2020-11-09 12:03:35,563 INFO L226 Difference]: Without dead ends: 242 [2020-11-09 12:03:35,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-11-09 12:03:35,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-11-09 12:03:35,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 194. [2020-11-09 12:03:35,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-11-09 12:03:35,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 517 transitions. [2020-11-09 12:03:35,570 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 517 transitions. Word has length 13 [2020-11-09 12:03:35,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:03:35,570 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 517 transitions. [2020-11-09 12:03:35,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 12:03:35,570 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 517 transitions. [2020-11-09 12:03:35,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 12:03:35,571 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:03:35,571 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:03:35,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-09 12:03:35,786 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:03:35,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:03:35,786 INFO L82 PathProgramCache]: Analyzing trace with hash 161462414, now seen corresponding path program 37 times [2020-11-09 12:03:35,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:03:35,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693668008] [2020-11-09 12:03:35,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:03:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:35,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693668008] [2020-11-09 12:03:35,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855745379] [2020-11-09 12:03:35,904 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 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 [2020-11-09 12:03:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:35,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 12:03:35,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:03:36,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:03:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:36,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:03:36,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-09 12:03:36,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796637987] [2020-11-09 12:03:36,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 12:03:36,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:03:36,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 12:03:36,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-11-09 12:03:36,164 INFO L87 Difference]: Start difference. First operand 194 states and 517 transitions. Second operand 17 states. [2020-11-09 12:03:36,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:03:36,746 INFO L93 Difference]: Finished difference Result 264 states and 671 transitions. [2020-11-09 12:03:36,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-09 12:03:36,747 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-11-09 12:03:36,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:03:36,749 INFO L225 Difference]: With dead ends: 264 [2020-11-09 12:03:36,749 INFO L226 Difference]: Without dead ends: 256 [2020-11-09 12:03:36,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2020-11-09 12:03:36,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-11-09 12:03:36,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 194. [2020-11-09 12:03:36,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-11-09 12:03:36,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 517 transitions. [2020-11-09 12:03:36,762 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 517 transitions. Word has length 14 [2020-11-09 12:03:36,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:03:36,762 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 517 transitions. [2020-11-09 12:03:36,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 12:03:36,762 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 517 transitions. [2020-11-09 12:03:36,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 12:03:36,763 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:03:36,763 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:03:36,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-09 12:03:36,971 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:03:36,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:03:36,972 INFO L82 PathProgramCache]: Analyzing trace with hash 161491244, now seen corresponding path program 38 times [2020-11-09 12:03:36,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:03:36,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199910457] [2020-11-09 12:03:36,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:03:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:37,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199910457] [2020-11-09 12:03:37,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612829222] [2020-11-09 12:03:37,095 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 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 [2020-11-09 12:03:37,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 12:03:37,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:03:37,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 12:03:37,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:03:37,354 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:03:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:37,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:03:37,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-09 12:03:37,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322155744] [2020-11-09 12:03:37,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 12:03:37,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:03:37,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 12:03:37,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-11-09 12:03:37,444 INFO L87 Difference]: Start difference. First operand 194 states and 517 transitions. Second operand 17 states. [2020-11-09 12:03:38,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:03:38,223 INFO L93 Difference]: Finished difference Result 284 states and 716 transitions. [2020-11-09 12:03:38,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-09 12:03:38,224 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-11-09 12:03:38,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:03:38,226 INFO L225 Difference]: With dead ends: 284 [2020-11-09 12:03:38,227 INFO L226 Difference]: Without dead ends: 276 [2020-11-09 12:03:38,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 12:03:38,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-11-09 12:03:38,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 195. [2020-11-09 12:03:38,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-11-09 12:03:38,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 522 transitions. [2020-11-09 12:03:38,232 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 522 transitions. Word has length 14 [2020-11-09 12:03:38,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:03:38,232 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 522 transitions. [2020-11-09 12:03:38,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 12:03:38,233 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 522 transitions. [2020-11-09 12:03:38,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 12:03:38,233 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:03:38,233 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:03:38,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-11-09 12:03:38,446 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:03:38,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:03:38,447 INFO L82 PathProgramCache]: Analyzing trace with hash 161492205, now seen corresponding path program 39 times [2020-11-09 12:03:38,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:03:38,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126032752] [2020-11-09 12:03:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:03:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:38,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126032752] [2020-11-09 12:03:38,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736444714] [2020-11-09 12:03:38,564 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 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 [2020-11-09 12:03:38,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-09 12:03:38,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:03:38,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-09 12:03:38,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:03:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:38,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:03:38,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-11-09 12:03:38,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469248324] [2020-11-09 12:03:38,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 12:03:38,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:03:38,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 12:03:38,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-11-09 12:03:38,708 INFO L87 Difference]: Start difference. First operand 195 states and 522 transitions. Second operand 12 states. [2020-11-09 12:03:39,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:03:39,057 INFO L93 Difference]: Finished difference Result 267 states and 678 transitions. [2020-11-09 12:03:39,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-09 12:03:39,058 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-11-09 12:03:39,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:03:39,060 INFO L225 Difference]: With dead ends: 267 [2020-11-09 12:03:39,060 INFO L226 Difference]: Without dead ends: 260 [2020-11-09 12:03:39,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-11-09 12:03:39,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-11-09 12:03:39,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 194. [2020-11-09 12:03:39,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-11-09 12:03:39,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 517 transitions. [2020-11-09 12:03:39,066 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 517 transitions. Word has length 14 [2020-11-09 12:03:39,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:03:39,066 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 517 transitions. [2020-11-09 12:03:39,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 12:03:39,066 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 517 transitions. [2020-11-09 12:03:39,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 12:03:39,067 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:03:39,067 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:03:39,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:03:39,280 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:03:39,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:03:39,280 INFO L82 PathProgramCache]: Analyzing trace with hash 162384974, now seen corresponding path program 40 times [2020-11-09 12:03:39,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:03:39,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498983593] [2020-11-09 12:03:39,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:03:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:03:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:39,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498983593] [2020-11-09 12:03:39,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063343238] [2020-11-09 12:03:39,393 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 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 [2020-11-09 12:03:39,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 12:03:39,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:03:39,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 12:03:39,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:03:39,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:03:39,669 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:03:39,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:03:42,858 WARN L194 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-11-09 12:03:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:03:42,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:03:42,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-11-09 12:03:42,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102143778] [2020-11-09 12:03:42,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 12:03:42,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:03:42,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 12:03:42,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=212, Unknown=1, NotChecked=0, Total=306 [2020-11-09 12:03:42,863 INFO L87 Difference]: Start difference. First operand 194 states and 517 transitions. Second operand 18 states. [2020-11-09 12:03:43,541 WARN L194 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 20 [2020-11-09 12:03:46,808 WARN L194 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 51 [2020-11-09 12:03:50,026 WARN L194 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 48 [2020-11-09 12:04:00,967 WARN L194 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-11-09 12:04:11,487 WARN L194 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-11-09 12:04:43,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:04:43,801 INFO L93 Difference]: Finished difference Result 323 states and 803 transitions. [2020-11-09 12:04:43,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-09 12:04:43,837 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-11-09 12:04:43,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:04:43,839 INFO L225 Difference]: With dead ends: 323 [2020-11-09 12:04:43,839 INFO L226 Difference]: Without dead ends: 308 [2020-11-09 12:04:43,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=434, Invalid=965, Unknown=7, NotChecked=0, Total=1406 [2020-11-09 12:04:43,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-11-09 12:04:43,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 197. [2020-11-09 12:04:43,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-11-09 12:04:43,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 530 transitions. [2020-11-09 12:04:43,844 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 530 transitions. Word has length 14 [2020-11-09 12:04:43,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:04:43,844 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 530 transitions. [2020-11-09 12:04:43,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 12:04:43,844 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 530 transitions. [2020-11-09 12:04:43,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 12:04:43,845 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:04:43,845 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:04:44,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:04:44,046 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:04:44,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:04:44,047 INFO L82 PathProgramCache]: Analyzing trace with hash 162385935, now seen corresponding path program 41 times [2020-11-09 12:04:44,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:04:44,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423481514] [2020-11-09 12:04:44,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:04:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:04:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:04:44,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423481514] [2020-11-09 12:04:44,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080418974] [2020-11-09 12:04:44,218 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 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 [2020-11-09 12:04:44,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-09 12:04:44,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:04:44,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 12:04:44,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:04:44,533 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:04:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:04:44,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:04:44,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-09 12:04:44,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363821214] [2020-11-09 12:04:44,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 12:04:44,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:04:44,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 12:04:44,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-11-09 12:04:44,588 INFO L87 Difference]: Start difference. First operand 197 states and 530 transitions. Second operand 17 states. [2020-11-09 12:04:45,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:04:45,829 INFO L93 Difference]: Finished difference Result 315 states and 798 transitions. [2020-11-09 12:04:45,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-09 12:04:45,830 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-11-09 12:04:45,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:04:45,833 INFO L225 Difference]: With dead ends: 315 [2020-11-09 12:04:45,833 INFO L226 Difference]: Without dead ends: 305 [2020-11-09 12:04:45,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=388, Invalid=872, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 12:04:45,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-11-09 12:04:45,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 197. [2020-11-09 12:04:45,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-11-09 12:04:45,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 530 transitions. [2020-11-09 12:04:45,839 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 530 transitions. Word has length 14 [2020-11-09 12:04:45,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:04:45,840 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 530 transitions. [2020-11-09 12:04:45,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 12:04:45,840 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 530 transitions. [2020-11-09 12:04:45,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 12:04:45,840 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:04:45,841 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:04:46,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-11-09 12:04:46,054 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:04:46,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:04:46,054 INFO L82 PathProgramCache]: Analyzing trace with hash 162414765, now seen corresponding path program 42 times [2020-11-09 12:04:46,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:04:46,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215434718] [2020-11-09 12:04:46,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:04:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:04:46,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:04:46,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215434718] [2020-11-09 12:04:46,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353534533] [2020-11-09 12:04:46,216 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 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 [2020-11-09 12:04:46,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-09 12:04:46,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:04:46,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 12:04:46,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:04:46,564 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:04:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:04:48,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:04:48,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-11-09 12:04:48,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092773103] [2020-11-09 12:04:48,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 12:04:48,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:04:48,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 12:04:48,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=218, Unknown=1, NotChecked=0, Total=306 [2020-11-09 12:04:48,737 INFO L87 Difference]: Start difference. First operand 197 states and 530 transitions. Second operand 18 states. [2020-11-09 12:04:57,481 WARN L194 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-09 12:04:58,955 WARN L194 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 39 DAG size of output: 20 [2020-11-09 12:05:20,208 WARN L194 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2020-11-09 12:05:35,946 WARN L194 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-11-09 12:05:49,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:05:49,427 INFO L93 Difference]: Finished difference Result 326 states and 818 transitions. [2020-11-09 12:05:49,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-09 12:05:49,429 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-11-09 12:05:49,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:05:49,432 INFO L225 Difference]: With dead ends: 326 [2020-11-09 12:05:49,432 INFO L226 Difference]: Without dead ends: 319 [2020-11-09 12:05:49,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=396, Invalid=928, Unknown=8, NotChecked=0, Total=1332 [2020-11-09 12:05:49,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-11-09 12:05:49,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 194. [2020-11-09 12:05:49,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-11-09 12:05:49,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 517 transitions. [2020-11-09 12:05:49,439 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 517 transitions. Word has length 14 [2020-11-09 12:05:49,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:05:49,439 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 517 transitions. [2020-11-09 12:05:49,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 12:05:49,439 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 517 transitions. [2020-11-09 12:05:49,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 12:05:49,440 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:05:49,440 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:05:49,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:05:49,649 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:05:49,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:05:49,650 INFO L82 PathProgramCache]: Analyzing trace with hash 190090604, now seen corresponding path program 43 times [2020-11-09 12:05:49,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:05:49,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472537000] [2020-11-09 12:05:49,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:05:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:05:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:05:49,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472537000] [2020-11-09 12:05:49,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558704788] [2020-11-09 12:05:49,811 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 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 [2020-11-09 12:05:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:05:49,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 12:05:49,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:05:50,142 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:05:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:05:50,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:05:50,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-09 12:05:50,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616198359] [2020-11-09 12:05:50,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 12:05:50,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:05:50,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 12:05:50,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-11-09 12:05:50,258 INFO L87 Difference]: Start difference. First operand 194 states and 517 transitions. Second operand 17 states. [2020-11-09 12:05:51,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:05:51,679 INFO L93 Difference]: Finished difference Result 296 states and 746 transitions. [2020-11-09 12:05:51,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-09 12:05:51,680 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-11-09 12:05:51,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:05:51,682 INFO L225 Difference]: With dead ends: 296 [2020-11-09 12:05:51,683 INFO L226 Difference]: Without dead ends: 288 [2020-11-09 12:05:51,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=429, Invalid=903, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 12:05:51,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-11-09 12:05:51,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 199. [2020-11-09 12:05:51,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-11-09 12:05:51,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 538 transitions. [2020-11-09 12:05:51,690 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 538 transitions. Word has length 14 [2020-11-09 12:05:51,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:05:51,690 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 538 transitions. [2020-11-09 12:05:51,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 12:05:51,691 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 538 transitions. [2020-11-09 12:05:51,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 12:05:51,691 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:05:51,691 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:05:51,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-09 12:05:51,892 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:05:51,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:05:51,893 INFO L82 PathProgramCache]: Analyzing trace with hash 190091565, now seen corresponding path program 44 times [2020-11-09 12:05:51,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:05:51,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304503947] [2020-11-09 12:05:51,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:05:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:05:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:05:52,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304503947] [2020-11-09 12:05:52,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754535800] [2020-11-09 12:05:52,061 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 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 [2020-11-09 12:05:52,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 12:05:52,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:05:52,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 12:05:52,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:05:52,414 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:05:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:05:52,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:05:52,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-09 12:05:52,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546508490] [2020-11-09 12:05:52,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 12:05:52,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:05:52,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 12:05:52,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-11-09 12:05:52,480 INFO L87 Difference]: Start difference. First operand 199 states and 538 transitions. Second operand 17 states. [2020-11-09 12:05:54,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:05:54,190 INFO L93 Difference]: Finished difference Result 308 states and 784 transitions. [2020-11-09 12:05:54,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 12:05:54,191 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-11-09 12:05:54,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:05:54,193 INFO L225 Difference]: With dead ends: 308 [2020-11-09 12:05:54,193 INFO L226 Difference]: Without dead ends: 301 [2020-11-09 12:05:54,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=429, Invalid=977, Unknown=0, NotChecked=0, Total=1406 [2020-11-09 12:05:54,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-11-09 12:05:54,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 198. [2020-11-09 12:05:54,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-11-09 12:05:54,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 533 transitions. [2020-11-09 12:05:54,199 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 533 transitions. Word has length 14 [2020-11-09 12:05:54,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:05:54,199 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 533 transitions. [2020-11-09 12:05:54,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 12:05:54,199 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 533 transitions. [2020-11-09 12:05:54,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 12:05:54,200 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:05:54,200 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:05:54,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-09 12:05:54,401 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:05:54,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:05:54,402 INFO L82 PathProgramCache]: Analyzing trace with hash 190120395, now seen corresponding path program 45 times [2020-11-09 12:05:54,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:05:54,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507809963] [2020-11-09 12:05:54,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:05:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:05:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:05:54,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507809963] [2020-11-09 12:05:54,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462166056] [2020-11-09 12:05:54,578 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 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 [2020-11-09 12:05:54,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-09 12:05:54,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:05:54,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 12:05:54,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:05:55,073 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:05:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:05:55,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:05:55,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-09 12:05:55,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287081352] [2020-11-09 12:05:55,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 12:05:55,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:05:55,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 12:05:55,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-11-09 12:05:55,201 INFO L87 Difference]: Start difference. First operand 198 states and 533 transitions. Second operand 17 states. [2020-11-09 12:05:56,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:05:56,822 INFO L93 Difference]: Finished difference Result 350 states and 899 transitions. [2020-11-09 12:05:56,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-09 12:05:56,823 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-11-09 12:05:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:05:56,825 INFO L225 Difference]: With dead ends: 350 [2020-11-09 12:05:56,825 INFO L226 Difference]: Without dead ends: 339 [2020-11-09 12:05:56,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=454, Invalid=1028, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 12:05:56,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-11-09 12:05:56,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 199. [2020-11-09 12:05:56,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-11-09 12:05:56,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 542 transitions. [2020-11-09 12:05:56,832 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 542 transitions. Word has length 14 [2020-11-09 12:05:56,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:05:56,833 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 542 transitions. [2020-11-09 12:05:56,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 12:05:56,833 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 542 transitions. [2020-11-09 12:05:56,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 12:05:56,834 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:05:56,834 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:05:57,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-09 12:05:57,047 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:05:57,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:05:57,047 INFO L82 PathProgramCache]: Analyzing trace with hash 190121356, now seen corresponding path program 46 times [2020-11-09 12:05:57,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:05:57,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888379994] [2020-11-09 12:05:57,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:05:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:05:57,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:05:57,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888379994] [2020-11-09 12:05:57,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179844488] [2020-11-09 12:05:57,207 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 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 [2020-11-09 12:05:57,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 12:05:57,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:05:57,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 12:05:57,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:05:57,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:05:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:05:57,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:05:57,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-09 12:05:57,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815759907] [2020-11-09 12:05:57,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 12:05:57,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:05:57,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 12:05:57,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-11-09 12:05:57,684 INFO L87 Difference]: Start difference. First operand 199 states and 542 transitions. Second operand 17 states. [2020-11-09 12:05:59,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:05:59,252 INFO L93 Difference]: Finished difference Result 309 states and 792 transitions. [2020-11-09 12:05:59,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-09 12:05:59,254 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-11-09 12:05:59,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:05:59,256 INFO L225 Difference]: With dead ends: 309 [2020-11-09 12:05:59,256 INFO L226 Difference]: Without dead ends: 300 [2020-11-09 12:05:59,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=442, Invalid=1040, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 12:05:59,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-11-09 12:05:59,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 197. [2020-11-09 12:05:59,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-11-09 12:05:59,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 532 transitions. [2020-11-09 12:05:59,261 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 532 transitions. Word has length 14 [2020-11-09 12:05:59,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:05:59,262 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 532 transitions. [2020-11-09 12:05:59,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 12:05:59,262 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 532 transitions. [2020-11-09 12:05:59,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 12:05:59,265 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:05:59,266 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:05:59,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-09 12:05:59,479 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:05:59,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:05:59,479 INFO L82 PathProgramCache]: Analyzing trace with hash 191015086, now seen corresponding path program 47 times [2020-11-09 12:05:59,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:05:59,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116489648] [2020-11-09 12:05:59,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:05:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:05:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:05:59,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116489648] [2020-11-09 12:05:59,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582982468] [2020-11-09 12:05:59,650 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 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 [2020-11-09 12:05:59,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-09 12:05:59,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:05:59,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 12:05:59,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:00,045 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:06:00,048 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:06:00,050 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:06:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:06:00,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:00,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-09 12:06:00,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267644919] [2020-11-09 12:06:00,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 12:06:00,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:00,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 12:06:00,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-11-09 12:06:00,134 INFO L87 Difference]: Start difference. First operand 197 states and 532 transitions. Second operand 17 states. [2020-11-09 12:06:01,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:01,821 INFO L93 Difference]: Finished difference Result 304 states and 775 transitions. [2020-11-09 12:06:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-09 12:06:01,823 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-11-09 12:06:01,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:01,825 INFO L225 Difference]: With dead ends: 304 [2020-11-09 12:06:01,825 INFO L226 Difference]: Without dead ends: 298 [2020-11-09 12:06:01,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=441, Invalid=1041, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 12:06:01,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-11-09 12:06:01,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 194. [2020-11-09 12:06:01,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-11-09 12:06:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 517 transitions. [2020-11-09 12:06:01,831 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 517 transitions. Word has length 14 [2020-11-09 12:06:01,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:01,832 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 517 transitions. [2020-11-09 12:06:01,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 12:06:01,832 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 517 transitions. [2020-11-09 12:06:01,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 12:06:01,833 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:01,833 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:02,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-09 12:06:02,048 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:02,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:02,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1048965134, now seen corresponding path program 48 times [2020-11-09 12:06:02,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:02,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701293674] [2020-11-09 12:06:02,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:06:02,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701293674] [2020-11-09 12:06:02,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028680084] [2020-11-09 12:06:02,209 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 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 [2020-11-09 12:06:02,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-09 12:06:02,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:06:02,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 12:06:02,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:02,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:06:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:06:02,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:02,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-09 12:06:02,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242020838] [2020-11-09 12:06:02,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 12:06:02,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:02,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 12:06:02,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-11-09 12:06:02,545 INFO L87 Difference]: Start difference. First operand 194 states and 517 transitions. Second operand 17 states. [2020-11-09 12:06:03,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:03,748 INFO L93 Difference]: Finished difference Result 290 states and 734 transitions. [2020-11-09 12:06:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 12:06:03,750 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-11-09 12:06:03,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:03,752 INFO L225 Difference]: With dead ends: 290 [2020-11-09 12:06:03,752 INFO L226 Difference]: Without dead ends: 282 [2020-11-09 12:06:03,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=474, Invalid=1008, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 12:06:03,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-11-09 12:06:03,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 201. [2020-11-09 12:06:03,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-11-09 12:06:03,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 546 transitions. [2020-11-09 12:06:03,757 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 546 transitions. Word has length 14 [2020-11-09 12:06:03,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:03,757 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 546 transitions. [2020-11-09 12:06:03,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 12:06:03,758 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 546 transitions. [2020-11-09 12:06:03,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 12:06:03,758 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:03,758 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:03,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:06:03,961 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:03,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:03,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1048966095, now seen corresponding path program 49 times [2020-11-09 12:06:03,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:03,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209322191] [2020-11-09 12:06:03,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:03,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:06:04,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209322191] [2020-11-09 12:06:04,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644518900] [2020-11-09 12:06:04,129 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 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 [2020-11-09 12:06:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:04,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 12:06:04,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:04,427 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 12:06:04,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:06:04,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:04,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-09 12:06:04,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405623500] [2020-11-09 12:06:04,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 12:06:04,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:04,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 12:06:04,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-11-09 12:06:04,451 INFO L87 Difference]: Start difference. First operand 201 states and 546 transitions. Second operand 17 states. [2020-11-09 12:06:05,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 12:06:05,880 INFO L93 Difference]: Finished difference Result 317 states and 811 transitions. [2020-11-09 12:06:05,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 12:06:05,882 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-11-09 12:06:05,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 12:06:05,884 INFO L225 Difference]: With dead ends: 317 [2020-11-09 12:06:05,884 INFO L226 Difference]: Without dead ends: 310 [2020-11-09 12:06:05,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=506, Invalid=1216, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 12:06:05,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-11-09 12:06:05,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 200. [2020-11-09 12:06:05,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-11-09 12:06:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 541 transitions. [2020-11-09 12:06:05,889 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 541 transitions. Word has length 14 [2020-11-09 12:06:05,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 12:06:05,890 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 541 transitions. [2020-11-09 12:06:05,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 12:06:05,890 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 541 transitions. [2020-11-09 12:06:05,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 12:06:05,890 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 12:06:05,891 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 12:06:06,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 12:06:06,098 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 12:06:06,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 12:06:06,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1048994925, now seen corresponding path program 50 times [2020-11-09 12:06:06,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 12:06:06,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560786668] [2020-11-09 12:06:06,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 12:06:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 12:06:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:06:06,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560786668] [2020-11-09 12:06:06,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943308735] [2020-11-09 12:06:06,265 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 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 [2020-11-09 12:06:06,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 12:06:06,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 12:06:06,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 12:06:06,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 12:06:06,586 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 12:06:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 12:06:08,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 12:06:08,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-11-09 12:06:08,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675189272] [2020-11-09 12:06:08,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 12:06:08,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 12:06:08,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 12:06:08,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=221, Unknown=1, NotChecked=0, Total=306 [2020-11-09 12:06:08,732 INFO L87 Difference]: Start difference. First operand 200 states and 541 transitions. Second operand 18 states. [2020-11-09 12:06:12,130 WARN L194 SmtUtils]: Spent 2.86 s on a formula simplification. DAG size of input: 44 DAG size of output: 22 [2020-11-09 12:06:14,410 WARN L194 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 28 Received shutdown request... [2020-11-09 12:06:20,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 12:06:20,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-11-09 12:06:20,797 WARN L546 AbstractCegarLoop]: Verification canceled [2020-11-09 12:06:20,802 WARN L250 ceAbstractionStarter]: Timeout [2020-11-09 12:06:20,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 12:06:20 BasicIcfg [2020-11-09 12:06:20,803 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-09 12:06:20,804 INFO L168 Benchmark]: Toolchain (without parser) took 269165.21 ms. Allocated memory was 161.5 MB in the beginning and 280.0 MB in the end (delta: 118.5 MB). Free memory was 135.2 MB in the beginning and 248.6 MB in the end (delta: -113.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 8.0 GB. [2020-11-09 12:06:20,804 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 161.5 MB. Free memory is still 133.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-09 12:06:20,804 INFO L168 Benchmark]: CACSL2BoogieTranslator took 661.47 ms. Allocated memory is still 161.5 MB. Free memory was 134.6 MB in the beginning and 141.1 MB in the end (delta: -6.5 MB). Peak memory consumption was 32.0 MB. Max. memory is 8.0 GB. [2020-11-09 12:06:20,805 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.46 ms. Allocated memory is still 161.5 MB. Free memory was 141.1 MB in the beginning and 139.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-09 12:06:20,805 INFO L168 Benchmark]: Boogie Preprocessor took 31.22 ms. Allocated memory is still 161.5 MB. Free memory was 139.5 MB in the beginning and 137.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-09 12:06:20,805 INFO L168 Benchmark]: RCFGBuilder took 578.16 ms. Allocated memory is still 161.5 MB. Free memory was 137.9 MB in the beginning and 117.5 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-11-09 12:06:20,806 INFO L168 Benchmark]: TraceAbstraction took 267827.75 ms. Allocated memory was 161.5 MB in the beginning and 280.0 MB in the end (delta: 118.5 MB). Free memory was 117.0 MB in the beginning and 248.6 MB in the end (delta: -131.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-09 12:06:20,808 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 161.5 MB. Free memory is still 133.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 661.47 ms. Allocated memory is still 161.5 MB. Free memory was 134.6 MB in the beginning and 141.1 MB in the end (delta: -6.5 MB). Peak memory consumption was 32.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 48.46 ms. Allocated memory is still 161.5 MB. Free memory was 141.1 MB in the beginning and 139.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.22 ms. Allocated memory is still 161.5 MB. Free memory was 139.5 MB in the beginning and 137.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 578.16 ms. Allocated memory is still 161.5 MB. Free memory was 137.9 MB in the beginning and 117.5 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 267827.75 ms. Allocated memory was 161.5 MB in the beginning and 280.0 MB in the end (delta: 118.5 MB). Free memory was 117.0 MB in the beginning and 248.6 MB in the end (delta: -131.7 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 866 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 12 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.9s, 67 PlacesBefore, 20 PlacesAfterwards, 66 TransitionsBefore, 16 TransitionsAfterwards, 1272 CoEnabledTransitionPairs, 6 FixpointIterations, 16 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 13 ConcurrentYvCompositions, 3 ChoiceCompositions, 65 TotalNumberOfCompositions, 1183 MoverChecksTotal - TimeoutResultAtElement [Line: 12]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 12). Cancelled while BasicCegarLoop was constructing difference of abstraction (200states) and FLOYD_HOARE automaton (currently 20 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (86 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 267.6s, OverallIterations: 63, TraceHistogramMax: 6, AutomataDifference: 214.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.0s, HoareTripleCheckerStatistics: 855 SDtfs, 8121 SDslu, 6562 SDs, 0 SdLazy, 4941 SolverSat, 1427 SolverUnsat, 52 SolverUnknown, 0 SolverNotchecked, 109.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1956 GetRequests, 287 SyntacticMatches, 55 SemanticMatches, 1614 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12135 ImplicationChecksByTransitivity, 128.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=201occurred in iteration=61, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 62 MinimizatonAttempts, 3637 StatesRemovedByMinimization, 61 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 31.5s InterpolantComputationTime, 1494 NumberOfCodeBlocks, 1494 NumberOfCodeBlocksAsserted, 189 NumberOfCheckSat, 1373 ConstructedInterpolants, 5 QuantifiedInterpolants, 138947 SizeOfPredicates, 57 NumberOfNonLiveVariables, 5824 ConjunctsInSsa, 563 ConjunctsInUnsatCore, 121 InterpolantComputations, 6 PerfectInterpolantSequences, 15/588 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown