/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-507b705 [2020-09-11 12:01:55,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-11 12:01:55,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-11 12:01:55,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-11 12:01:55,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-11 12:01:55,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-11 12:01:55,448 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-11 12:01:55,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-11 12:01:55,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-11 12:01:55,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-11 12:01:55,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-11 12:01:55,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-11 12:01:55,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-11 12:01:55,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-11 12:01:55,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-11 12:01:55,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-11 12:01:55,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-11 12:01:55,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-11 12:01:55,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-11 12:01:55,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-11 12:01:55,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-11 12:01:55,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-11 12:01:55,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-11 12:01:55,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-11 12:01:55,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-11 12:01:55,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-11 12:01:55,481 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-11 12:01:55,482 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-11 12:01:55,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-11 12:01:55,484 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-11 12:01:55,484 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-11 12:01:55,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-11 12:01:55,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-11 12:01:55,487 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-11 12:01:55,491 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-11 12:01:55,491 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-11 12:01:55,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-11 12:01:55,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-11 12:01:55,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-11 12:01:55,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-11 12:01:55,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-11 12:01:55,496 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-11 12:01:55,536 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-11 12:01:55,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-11 12:01:55,539 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-11 12:01:55,539 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-11 12:01:55,540 INFO L138 SettingsManager]: * Use SBE=true [2020-09-11 12:01:55,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-11 12:01:55,540 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-11 12:01:55,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-11 12:01:55,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-11 12:01:55,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-11 12:01:55,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-11 12:01:55,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-11 12:01:55,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-11 12:01:55,543 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-11 12:01:55,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-11 12:01:55,543 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-11 12:01:55,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-11 12:01:55,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-11 12:01:55,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-11 12:01:55,544 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-11 12:01:55,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-11 12:01:55,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 12:01:55,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-11 12:01:55,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-11 12:01:55,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-11 12:01:55,546 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-11 12:01:55,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-11 12:01:55,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-11 12:01:55,547 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-11 12:01:55,547 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-11 12:01:56,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-11 12:01:56,755 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-11 12:01:56,760 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-11 12:01:56,763 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-11 12:01:56,763 INFO L275 PluginConnector]: CDTParser initialized [2020-09-11 12:01:56,765 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-09-11 12:01:56,851 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/270adff39/be95fd39bbbe4801b036fe63b4518d14/FLAG432eabe1c [2020-09-11 12:01:57,491 INFO L306 CDTParser]: Found 1 translation units. [2020-09-11 12:01:57,492 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-09-11 12:01:57,510 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/270adff39/be95fd39bbbe4801b036fe63b4518d14/FLAG432eabe1c [2020-09-11 12:01:57,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/270adff39/be95fd39bbbe4801b036fe63b4518d14 [2020-09-11 12:01:57,858 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-11 12:01:57,863 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-11 12:01:57,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-11 12:01:57,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-11 12:01:57,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-11 12:01:57,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 12:01:57" (1/1) ... [2020-09-11 12:01:57,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b8c92a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:57, skipping insertion in model container [2020-09-11 12:01:57,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 12:01:57" (1/1) ... [2020-09-11 12:01:57,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-11 12:01:57,933 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-11 12:01:58,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 12:01:58,431 INFO L203 MainTranslator]: Completed pre-run [2020-09-11 12:01:58,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 12:01:58,583 INFO L208 MainTranslator]: Completed translation [2020-09-11 12:01:58,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58 WrapperNode [2020-09-11 12:01:58,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-11 12:01:58,585 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-11 12:01:58,585 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-11 12:01:58,585 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-11 12:01:58,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,616 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,643 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-11 12:01:58,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-11 12:01:58,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-11 12:01:58,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-11 12:01:58,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-11 12:01:58,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-11 12:01:58,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-11 12:01:58,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-11 12:01:58,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 12:01:58,777 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-11 12:01:58,777 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-11 12:01:58,777 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-11 12:01:58,778 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-11 12:01:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-11 12:01:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-11 12:01:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-11 12:01:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-11 12:01:58,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-11 12:01:58,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-11 12:01:58,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-11 12:01:58,781 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-11 12:01:59,203 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-11 12:01:59,204 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-11 12:01:59,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 12:01:59 BoogieIcfgContainer [2020-09-11 12:01:59,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-11 12:01:59,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-11 12:01:59,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-11 12:01:59,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-11 12:01:59,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 12:01:57" (1/3) ... [2020-09-11 12:01:59,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651109d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 12:01:59, skipping insertion in model container [2020-09-11 12:01:59,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (2/3) ... [2020-09-11 12:01:59,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651109d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 12:01:59, skipping insertion in model container [2020-09-11 12:01:59,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 12:01:59" (3/3) ... [2020-09-11 12:01:59,218 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2020-09-11 12:01:59,231 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-11 12:01:59,231 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-11 12:01:59,242 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-11 12:01:59,244 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-11 12:01:59,274 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,274 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,275 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,275 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,275 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,276 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,276 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,276 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,276 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,277 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,277 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,277 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,278 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,278 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,278 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,279 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,279 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,279 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,279 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,280 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,280 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,280 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,281 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,281 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,281 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,281 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,282 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,282 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,282 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,283 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,287 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,287 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,288 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,288 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,288 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,288 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,298 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,299 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,299 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,299 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,299 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,300 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,320 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-11 12:01:59,345 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-11 12:01:59,345 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-11 12:01:59,345 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-11 12:01:59,345 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-11 12:01:59,345 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-11 12:01:59,346 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-11 12:01:59,346 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-11 12:01:59,346 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-11 12:01:59,364 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-09-11 12:01:59,367 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-11 12:01:59,414 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-11 12:01:59,415 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 12:01:59,422 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-09-11 12:01:59,425 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-11 12:01:59,444 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-11 12:01:59,448 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 12:01:59,449 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-09-11 12:01:59,451 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-09-11 12:01:59,453 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-11 12:02:00,736 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-09-11 12:02:00,866 INFO L206 etLargeBlockEncoding]: Checked pairs total: 988 [2020-09-11 12:02:00,866 INFO L214 etLargeBlockEncoding]: Total number of compositions: 47 [2020-09-11 12:02:00,871 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-11 12:02:00,885 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-11 12:02:00,888 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-11 12:02:00,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-11 12:02:00,897 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:00,899 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-11 12:02:00,899 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:00,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:00,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1563716626, now seen corresponding path program 1 times [2020-09-11 12:02:00,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:00,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193839083] [2020-09-11 12:02:00,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:01,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193839083] [2020-09-11 12:02:01,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:01,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-11 12:02:01,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656644864] [2020-09-11 12:02:01,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 12:02:01,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:01,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 12:02:01,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 12:02:01,287 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-11 12:02:01,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:01,369 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-09-11 12:02:01,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 12:02:01,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-11 12:02:01,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:01,392 INFO L225 Difference]: With dead ends: 83 [2020-09-11 12:02:01,393 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 12:02:01,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 12:02:01,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 12:02:01,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-09-11 12:02:01,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 12:02:01,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-09-11 12:02:01,446 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-09-11 12:02:01,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:01,446 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-09-11 12:02:01,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 12:02:01,447 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-09-11 12:02:01,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 12:02:01,448 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:01,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:01,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-11 12:02:01,449 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:01,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:01,449 INFO L82 PathProgramCache]: Analyzing trace with hash 956938306, now seen corresponding path program 1 times [2020-09-11 12:02:01,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:01,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102373544] [2020-09-11 12:02:01,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:01,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:01,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102373544] [2020-09-11 12:02:01,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:01,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 12:02:01,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998616243] [2020-09-11 12:02:01,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 12:02:01,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:01,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 12:02:01,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-11 12:02:01,578 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-09-11 12:02:01,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:01,659 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-09-11 12:02:01,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:02:01,660 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 12:02:01,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:01,661 INFO L225 Difference]: With dead ends: 80 [2020-09-11 12:02:01,661 INFO L226 Difference]: Without dead ends: 75 [2020-09-11 12:02:01,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-11 12:02:01,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-11 12:02:01,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-09-11 12:02:01,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 12:02:01,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-09-11 12:02:01,683 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-09-11 12:02:01,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:01,688 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-09-11 12:02:01,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 12:02:01,688 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-09-11 12:02:01,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 12:02:01,689 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:01,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:01,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-11 12:02:01,690 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:01,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:01,690 INFO L82 PathProgramCache]: Analyzing trace with hash 507192011, now seen corresponding path program 1 times [2020-09-11 12:02:01,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:01,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650734713] [2020-09-11 12:02:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:01,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650734713] [2020-09-11 12:02:01,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:01,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 12:02:01,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148583565] [2020-09-11 12:02:01,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 12:02:01,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:01,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 12:02:01,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 12:02:01,780 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-09-11 12:02:01,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:01,810 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-09-11 12:02:01,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 12:02:01,810 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 12:02:01,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:01,812 INFO L225 Difference]: With dead ends: 73 [2020-09-11 12:02:01,812 INFO L226 Difference]: Without dead ends: 70 [2020-09-11 12:02:01,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 12:02:01,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-11 12:02:01,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-11 12:02:01,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 12:02:01,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-09-11 12:02:01,822 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-09-11 12:02:01,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:01,822 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-09-11 12:02:01,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 12:02:01,823 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-09-11 12:02:01,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 12:02:01,826 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:01,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:01,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-11 12:02:01,827 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:01,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:01,827 INFO L82 PathProgramCache]: Analyzing trace with hash 507214331, now seen corresponding path program 2 times [2020-09-11 12:02:01,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:01,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413060774] [2020-09-11 12:02:01,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:01,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413060774] [2020-09-11 12:02:01,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:01,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 12:02:01,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946813575] [2020-09-11 12:02:01,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 12:02:01,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:01,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 12:02:01,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-11 12:02:01,926 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-09-11 12:02:02,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:02,012 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-09-11 12:02:02,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:02:02,014 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 12:02:02,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:02,016 INFO L225 Difference]: With dead ends: 86 [2020-09-11 12:02:02,016 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 12:02:02,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-11 12:02:02,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 12:02:02,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-09-11 12:02:02,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 12:02:02,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-09-11 12:02:02,026 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-09-11 12:02:02,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:02,026 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-09-11 12:02:02,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 12:02:02,026 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-09-11 12:02:02,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 12:02:02,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:02,027 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:02,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-11 12:02:02,028 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:02,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:02,028 INFO L82 PathProgramCache]: Analyzing trace with hash -399661872, now seen corresponding path program 2 times [2020-09-11 12:02:02,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:02,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433005632] [2020-09-11 12:02:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:02,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433005632] [2020-09-11 12:02:02,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311198782] [2020-09-11 12:02:02,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:02,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:02,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:02,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:02:02,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:02,303 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:02,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:02,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-09-11 12:02:02,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277509874] [2020-09-11 12:02:02,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:02:02,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:02,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:02:02,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:02:02,332 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-09-11 12:02:02,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:02,414 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-09-11 12:02:02,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:02,414 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-09-11 12:02:02,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:02,416 INFO L225 Difference]: With dead ends: 101 [2020-09-11 12:02:02,416 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 12:02:02,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:02,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 12:02:02,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-09-11 12:02:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 12:02:02,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-09-11 12:02:02,425 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-09-11 12:02:02,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:02,426 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-09-11 12:02:02,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:02:02,426 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-09-11 12:02:02,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 12:02:02,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:02,427 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:02,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:02,636 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:02,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:02,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1456916488, now seen corresponding path program 3 times [2020-09-11 12:02:02,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:02,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147331751] [2020-09-11 12:02:02,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:02,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:02,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147331751] [2020-09-11 12:02:02,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844530340] [2020-09-11 12:02:02,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:02,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:02,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:02,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:02:02,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:02,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:02,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-11 12:02:02,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558946126] [2020-09-11 12:02:02,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:02:02,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:02,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:02:02,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:02:02,874 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-09-11 12:02:02,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:02,913 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-11 12:02:02,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-11 12:02:02,914 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-11 12:02:02,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:02,915 INFO L225 Difference]: With dead ends: 84 [2020-09-11 12:02:02,915 INFO L226 Difference]: Without dead ends: 81 [2020-09-11 12:02:02,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:02:02,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-11 12:02:02,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-09-11 12:02:02,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 12:02:02,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-09-11 12:02:02,933 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-09-11 12:02:02,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:02,933 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-09-11 12:02:02,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:02:02,934 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-09-11 12:02:02,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 12:02:02,935 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:02,935 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:03,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:03,150 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:03,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:03,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1456224568, now seen corresponding path program 4 times [2020-09-11 12:02:03,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:03,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811667450] [2020-09-11 12:02:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:03,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811667450] [2020-09-11 12:02:03,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124737713] [2020-09-11 12:02:03,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:03,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:03,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:03,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:02:03,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:03,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:03,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-11 12:02:03,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991830375] [2020-09-11 12:02:03,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:02:03,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:03,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:02:03,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:02:03,376 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-09-11 12:02:03,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:03,456 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-09-11 12:02:03,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:02:03,456 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-11 12:02:03,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:03,457 INFO L225 Difference]: With dead ends: 90 [2020-09-11 12:02:03,457 INFO L226 Difference]: Without dead ends: 87 [2020-09-11 12:02:03,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:02:03,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-11 12:02:03,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-09-11 12:02:03,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 12:02:03,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-09-11 12:02:03,465 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-09-11 12:02:03,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:03,465 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-09-11 12:02:03,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:02:03,466 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-09-11 12:02:03,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 12:02:03,467 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:03,467 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:03,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:03,681 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:03,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:03,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1456202248, now seen corresponding path program 5 times [2020-09-11 12:02:03,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:03,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973458092] [2020-09-11 12:02:03,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:03,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973458092] [2020-09-11 12:02:03,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049487250] [2020-09-11 12:02:03,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:03,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:03,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:03,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:02:03,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:03,901 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:03,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:03,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-11 12:02:03,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581330700] [2020-09-11 12:02:03,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:02:03,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:03,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:02:03,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:02:03,922 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-09-11 12:02:04,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:04,048 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-09-11 12:02:04,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:04,048 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-11 12:02:04,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:04,050 INFO L225 Difference]: With dead ends: 99 [2020-09-11 12:02:04,050 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 12:02:04,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:02:04,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 12:02:04,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-09-11 12:02:04,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-11 12:02:04,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-09-11 12:02:04,071 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-09-11 12:02:04,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:04,071 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-09-11 12:02:04,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:02:04,072 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-09-11 12:02:04,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:04,073 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:04,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:04,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:04,293 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:04,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:04,294 INFO L82 PathProgramCache]: Analyzing trace with hash 483638869, now seen corresponding path program 1 times [2020-09-11 12:02:04,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:04,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432831358] [2020-09-11 12:02:04,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:04,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:04,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432831358] [2020-09-11 12:02:04,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:04,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:02:04,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069546825] [2020-09-11 12:02:04,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:02:04,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:04,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:02:04,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:02:04,383 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-09-11 12:02:04,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:04,415 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-09-11 12:02:04,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-11 12:02:04,416 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:02:04,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:04,418 INFO L225 Difference]: With dead ends: 92 [2020-09-11 12:02:04,418 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 12:02:04,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:02:04,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 12:02:04,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-09-11 12:02:04,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 12:02:04,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-09-11 12:02:04,426 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-09-11 12:02:04,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:04,427 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-09-11 12:02:04,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:02:04,427 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-09-11 12:02:04,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:04,428 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:04,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:04,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-11 12:02:04,429 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:04,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:04,429 INFO L82 PathProgramCache]: Analyzing trace with hash 484301959, now seen corresponding path program 2 times [2020-09-11 12:02:04,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:04,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482854062] [2020-09-11 12:02:04,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:04,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482854062] [2020-09-11 12:02:04,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:04,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:02:04,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170786282] [2020-09-11 12:02:04,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:02:04,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:04,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:02:04,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:02:04,567 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-09-11 12:02:04,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:04,622 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-09-11 12:02:04,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:02:04,623 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:02:04,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:04,624 INFO L225 Difference]: With dead ends: 100 [2020-09-11 12:02:04,624 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 12:02:04,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-11 12:02:04,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 12:02:04,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-09-11 12:02:04,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-11 12:02:04,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-09-11 12:02:04,643 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-09-11 12:02:04,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:04,645 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-09-11 12:02:04,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:02:04,646 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-09-11 12:02:04,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:04,647 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:04,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:04,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-11 12:02:04,648 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:04,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:04,651 INFO L82 PathProgramCache]: Analyzing trace with hash 484324279, now seen corresponding path program 3 times [2020-09-11 12:02:04,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:04,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240526158] [2020-09-11 12:02:04,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:04,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240526158] [2020-09-11 12:02:04,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:04,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:02:04,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97553837] [2020-09-11 12:02:04,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:02:04,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:04,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:02:04,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:02:04,773 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-09-11 12:02:04,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:04,865 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-11 12:02:04,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:04,866 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:02:04,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:04,868 INFO L225 Difference]: With dead ends: 105 [2020-09-11 12:02:04,868 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 12:02:04,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:02:04,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 12:02:04,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-11 12:02:04,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 12:02:04,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-09-11 12:02:04,875 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-09-11 12:02:04,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:04,876 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-09-11 12:02:04,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:02:04,876 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-09-11 12:02:04,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:04,877 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:04,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:04,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-11 12:02:04,877 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:04,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:04,878 INFO L82 PathProgramCache]: Analyzing trace with hash 484353109, now seen corresponding path program 4 times [2020-09-11 12:02:04,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:04,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329013533] [2020-09-11 12:02:04,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:04,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329013533] [2020-09-11 12:02:04,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:04,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:02:04,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712105134] [2020-09-11 12:02:04,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:02:04,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:04,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:02:04,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:02:04,954 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-09-11 12:02:05,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:05,034 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-11 12:02:05,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:05,035 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:02:05,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:05,036 INFO L225 Difference]: With dead ends: 105 [2020-09-11 12:02:05,037 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 12:02:05,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:02:05,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 12:02:05,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-11 12:02:05,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 12:02:05,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-09-11 12:02:05,042 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-09-11 12:02:05,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:05,043 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-09-11 12:02:05,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:02:05,043 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-09-11 12:02:05,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:05,044 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:05,044 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:05,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-11 12:02:05,044 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:05,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:05,045 INFO L82 PathProgramCache]: Analyzing trace with hash 495405570, now seen corresponding path program 3 times [2020-09-11 12:02:05,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:05,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767049052] [2020-09-11 12:02:05,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:05,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767049052] [2020-09-11 12:02:05,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941664410] [2020-09-11 12:02:05,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:05,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:05,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:05,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:05,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:05,248 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:05,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:05,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-11 12:02:05,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504216634] [2020-09-11 12:02:05,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:02:05,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:05,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:02:05,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:02:05,272 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-09-11 12:02:05,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:05,374 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-09-11 12:02:05,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:05,374 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-09-11 12:02:05,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:05,376 INFO L225 Difference]: With dead ends: 122 [2020-09-11 12:02:05,376 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 12:02:05,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:02:05,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 12:02:05,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-09-11 12:02:05,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-11 12:02:05,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-09-11 12:02:05,381 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-09-11 12:02:05,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:05,381 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-09-11 12:02:05,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:02:05,382 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-09-11 12:02:05,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:05,382 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:05,383 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:05,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-11 12:02:05,596 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:05,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:05,597 INFO L82 PathProgramCache]: Analyzing trace with hash 2080229483, now seen corresponding path program 6 times [2020-09-11 12:02:05,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:05,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671684304] [2020-09-11 12:02:05,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:05,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671684304] [2020-09-11 12:02:05,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860078673] [2020-09-11 12:02:05,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:05,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:05,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:05,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:05,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:05,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:05,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:05,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966359733] [2020-09-11 12:02:05,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:05,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:05,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:05,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:05,836 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-09-11 12:02:05,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:05,873 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-11 12:02:05,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:02:05,874 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-11 12:02:05,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:05,875 INFO L225 Difference]: With dead ends: 108 [2020-09-11 12:02:05,875 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 12:02:05,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:05,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 12:02:05,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-09-11 12:02:05,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-11 12:02:05,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-09-11 12:02:05,881 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-09-11 12:02:05,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:05,881 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-09-11 12:02:05,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:05,882 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-09-11 12:02:05,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:05,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:05,882 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:06,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:06,095 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:06,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:06,096 INFO L82 PathProgramCache]: Analyzing trace with hash 2101679003, now seen corresponding path program 7 times [2020-09-11 12:02:06,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:06,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849710274] [2020-09-11 12:02:06,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:06,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849710274] [2020-09-11 12:02:06,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858729778] [2020-09-11 12:02:06,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:06,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:06,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:06,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:06,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:06,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322464374] [2020-09-11 12:02:06,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:06,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:06,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:06,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:06,349 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-09-11 12:02:06,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:06,420 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-09-11 12:02:06,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:02:06,420 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-11 12:02:06,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:06,421 INFO L225 Difference]: With dead ends: 116 [2020-09-11 12:02:06,422 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 12:02:06,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:02:06,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 12:02:06,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-09-11 12:02:06,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-11 12:02:06,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-09-11 12:02:06,426 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-09-11 12:02:06,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:06,427 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-09-11 12:02:06,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:06,427 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-09-11 12:02:06,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:06,428 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:06,428 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:06,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-11 12:02:06,629 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:06,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:06,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2102370923, now seen corresponding path program 8 times [2020-09-11 12:02:06,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:06,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858945424] [2020-09-11 12:02:06,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:06,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:06,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858945424] [2020-09-11 12:02:06,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981234156] [2020-09-11 12:02:06,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:06,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:06,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:06,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:06,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:06,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:06,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:06,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572907702] [2020-09-11 12:02:06,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:06,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:06,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:06,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:06,898 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-09-11 12:02:07,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:07,012 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-09-11 12:02:07,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:07,017 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-11 12:02:07,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:07,018 INFO L225 Difference]: With dead ends: 115 [2020-09-11 12:02:07,018 INFO L226 Difference]: Without dead ends: 112 [2020-09-11 12:02:07,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:07,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-11 12:02:07,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-09-11 12:02:07,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-11 12:02:07,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-09-11 12:02:07,023 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-09-11 12:02:07,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:07,023 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-09-11 12:02:07,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:07,024 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-09-11 12:02:07,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:07,024 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:07,024 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:07,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-11 12:02:07,238 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:07,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:07,239 INFO L82 PathProgramCache]: Analyzing trace with hash 2102393243, now seen corresponding path program 9 times [2020-09-11 12:02:07,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:07,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442997707] [2020-09-11 12:02:07,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:07,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442997707] [2020-09-11 12:02:07,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229936502] [2020-09-11 12:02:07,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:07,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:07,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:07,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:07,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:07,463 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:07,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:07,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:07,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434069837] [2020-09-11 12:02:07,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:07,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:07,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:07,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:07,481 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-09-11 12:02:07,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:07,603 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-09-11 12:02:07,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:07,604 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-11 12:02:07,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:07,605 INFO L225 Difference]: With dead ends: 124 [2020-09-11 12:02:07,606 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 12:02:07,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:07,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 12:02:07,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-09-11 12:02:07,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-11 12:02:07,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-09-11 12:02:07,611 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-09-11 12:02:07,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:07,611 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-09-11 12:02:07,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:07,611 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-09-11 12:02:07,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:07,612 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:07,612 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:07,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-11 12:02:07,824 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:07,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:07,825 INFO L82 PathProgramCache]: Analyzing trace with hash 2107902445, now seen corresponding path program 5 times [2020-09-11 12:02:07,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:07,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792148069] [2020-09-11 12:02:07,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:07,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792148069] [2020-09-11 12:02:07,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344978722] [2020-09-11 12:02:07,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:07,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:07,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:07,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:07,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:08,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:08,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:08,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103875808] [2020-09-11 12:02:08,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:08,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:08,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:08,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:08,047 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-09-11 12:02:08,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:08,100 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-09-11 12:02:08,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:02:08,101 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:08,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:08,102 INFO L225 Difference]: With dead ends: 113 [2020-09-11 12:02:08,102 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 12:02:08,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:08,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 12:02:08,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-09-11 12:02:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-11 12:02:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-09-11 12:02:08,108 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-09-11 12:02:08,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:08,109 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-09-11 12:02:08,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:08,109 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-09-11 12:02:08,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:08,110 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:08,110 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:08,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-11 12:02:08,323 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:08,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:08,324 INFO L82 PathProgramCache]: Analyzing trace with hash 2107903406, now seen corresponding path program 6 times [2020-09-11 12:02:08,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:08,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485438364] [2020-09-11 12:02:08,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:08,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485438364] [2020-09-11 12:02:08,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939592583] [2020-09-11 12:02:08,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:08,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:08,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:08,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:08,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:08,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:08,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:08,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901251308] [2020-09-11 12:02:08,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:08,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:08,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:08,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:08,546 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-09-11 12:02:08,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:08,631 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-09-11 12:02:08,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:02:08,631 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:08,633 INFO L225 Difference]: With dead ends: 118 [2020-09-11 12:02:08,633 INFO L226 Difference]: Without dead ends: 116 [2020-09-11 12:02:08,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:08,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-11 12:02:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-09-11 12:02:08,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-11 12:02:08,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-09-11 12:02:08,638 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-09-11 12:02:08,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:08,638 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-09-11 12:02:08,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:08,638 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-09-11 12:02:08,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:08,639 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:08,639 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:08,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:08,850 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:08,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:08,851 INFO L82 PathProgramCache]: Analyzing trace with hash 2107932236, now seen corresponding path program 7 times [2020-09-11 12:02:08,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:08,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851057180] [2020-09-11 12:02:08,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:08,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:08,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851057180] [2020-09-11 12:02:08,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432131460] [2020-09-11 12:02:08,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:08,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:08,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:09,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:09,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:09,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88458306] [2020-09-11 12:02:09,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:09,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:09,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:09,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:09,058 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-09-11 12:02:09,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:09,133 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-09-11 12:02:09,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:02:09,133 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:09,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:09,134 INFO L225 Difference]: With dead ends: 119 [2020-09-11 12:02:09,134 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 12:02:09,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:09,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 12:02:09,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-09-11 12:02:09,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-11 12:02:09,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-09-11 12:02:09,139 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-09-11 12:02:09,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:09,140 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-09-11 12:02:09,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:09,140 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-09-11 12:02:09,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:09,141 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:09,141 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:09,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:09,353 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:09,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:09,354 INFO L82 PathProgramCache]: Analyzing trace with hash 2128458235, now seen corresponding path program 8 times [2020-09-11 12:02:09,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:09,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800407853] [2020-09-11 12:02:09,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:09,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800407853] [2020-09-11 12:02:09,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937261401] [2020-09-11 12:02:09,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:09,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:09,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:09,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:09,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:09,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:09,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:09,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125643106] [2020-09-11 12:02:09,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:09,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:09,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:09,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:09,608 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-09-11 12:02:09,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:09,678 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-09-11 12:02:09,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:02:09,680 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:09,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:09,681 INFO L225 Difference]: With dead ends: 122 [2020-09-11 12:02:09,681 INFO L226 Difference]: Without dead ends: 120 [2020-09-11 12:02:09,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:02:09,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-11 12:02:09,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-09-11 12:02:09,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-11 12:02:09,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-09-11 12:02:09,688 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-09-11 12:02:09,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:09,688 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-09-11 12:02:09,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:09,689 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-09-11 12:02:09,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:09,689 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:09,689 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:09,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-11 12:02:09,903 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:09,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:09,904 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459196, now seen corresponding path program 9 times [2020-09-11 12:02:09,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:09,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853418909] [2020-09-11 12:02:09,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:09,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853418909] [2020-09-11 12:02:09,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452622727] [2020-09-11 12:02:09,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:10,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:10,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:10,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:10,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:10,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:10,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:10,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283059925] [2020-09-11 12:02:10,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:10,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:10,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:10,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:10,110 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-09-11 12:02:10,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:10,220 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-09-11 12:02:10,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:10,221 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:10,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:10,222 INFO L225 Difference]: With dead ends: 123 [2020-09-11 12:02:10,222 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 12:02:10,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:02:10,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 12:02:10,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-09-11 12:02:10,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-11 12:02:10,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-09-11 12:02:10,227 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-09-11 12:02:10,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:10,227 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-09-11 12:02:10,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:10,228 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-09-11 12:02:10,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:10,228 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:10,228 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:10,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:10,439 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:10,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:10,439 INFO L82 PathProgramCache]: Analyzing trace with hash 2129121325, now seen corresponding path program 10 times [2020-09-11 12:02:10,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:10,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333226642] [2020-09-11 12:02:10,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:10,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:10,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333226642] [2020-09-11 12:02:10,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356246524] [2020-09-11 12:02:10,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:10,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:10,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:10,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:10,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:10,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:10,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:10,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:10,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477698633] [2020-09-11 12:02:10,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:10,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:10,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:10,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:10,669 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-09-11 12:02:10,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:10,775 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-11 12:02:10,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:10,775 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:10,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:10,776 INFO L225 Difference]: With dead ends: 123 [2020-09-11 12:02:10,777 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 12:02:10,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:10,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 12:02:10,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-09-11 12:02:10,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-11 12:02:10,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-09-11 12:02:10,781 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-09-11 12:02:10,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:10,782 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-09-11 12:02:10,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:10,782 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-09-11 12:02:10,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:10,785 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:10,785 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:10,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-11 12:02:10,987 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:10,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:10,988 INFO L82 PathProgramCache]: Analyzing trace with hash 2129143645, now seen corresponding path program 11 times [2020-09-11 12:02:10,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:10,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711952828] [2020-09-11 12:02:10,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:11,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711952828] [2020-09-11 12:02:11,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442965759] [2020-09-11 12:02:11,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:11,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:11,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:11,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:11,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:11,194 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:11,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:11,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:11,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354378098] [2020-09-11 12:02:11,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:11,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:11,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:11,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:11,239 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-09-11 12:02:11,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:11,403 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-09-11 12:02:11,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:11,404 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:11,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:11,405 INFO L225 Difference]: With dead ends: 133 [2020-09-11 12:02:11,405 INFO L226 Difference]: Without dead ends: 128 [2020-09-11 12:02:11,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:02:11,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-11 12:02:11,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-09-11 12:02:11,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-11 12:02:11,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-09-11 12:02:11,409 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-09-11 12:02:11,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:11,410 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-09-11 12:02:11,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:11,410 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-09-11 12:02:11,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:11,410 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:11,411 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:11,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:11,622 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:11,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:11,623 INFO L82 PathProgramCache]: Analyzing trace with hash 2129151116, now seen corresponding path program 12 times [2020-09-11 12:02:11,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:11,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215898746] [2020-09-11 12:02:11,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:11,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:11,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:11,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215898746] [2020-09-11 12:02:11,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013281438] [2020-09-11 12:02:11,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:11,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:11,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:11,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:11,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:11,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:11,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:11,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344482977] [2020-09-11 12:02:11,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:11,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:11,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:11,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:11,832 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-09-11 12:02:11,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:11,969 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-09-11 12:02:11,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:11,970 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:11,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:11,971 INFO L225 Difference]: With dead ends: 127 [2020-09-11 12:02:11,971 INFO L226 Difference]: Without dead ends: 125 [2020-09-11 12:02:11,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:11,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-11 12:02:11,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-09-11 12:02:11,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-11 12:02:11,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-11 12:02:11,976 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-11 12:02:11,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:11,976 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-11 12:02:11,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:11,976 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-11 12:02:11,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:11,977 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:11,977 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:12,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-11 12:02:12,189 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:12,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:12,189 INFO L82 PathProgramCache]: Analyzing trace with hash 2129172475, now seen corresponding path program 13 times [2020-09-11 12:02:12,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:12,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642942625] [2020-09-11 12:02:12,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:12,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642942625] [2020-09-11 12:02:12,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607222492] [2020-09-11 12:02:12,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:12,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:12,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:12,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:12,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:12,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:12,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972024059] [2020-09-11 12:02:12,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:12,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:12,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:12,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:12,384 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-11 12:02:12,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:12,633 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-09-11 12:02:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:02:12,633 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:12,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:12,634 INFO L225 Difference]: With dead ends: 141 [2020-09-11 12:02:12,634 INFO L226 Difference]: Without dead ends: 136 [2020-09-11 12:02:12,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:02:12,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-11 12:02:12,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-09-11 12:02:12,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-11 12:02:12,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-11 12:02:12,639 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-11 12:02:12,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:12,640 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-11 12:02:12,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:12,640 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-11 12:02:12,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:12,640 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:12,641 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:12,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-11 12:02:12,852 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:12,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:12,852 INFO L82 PathProgramCache]: Analyzing trace with hash 2129173436, now seen corresponding path program 14 times [2020-09-11 12:02:12,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:12,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949042169] [2020-09-11 12:02:12,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:12,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949042169] [2020-09-11 12:02:12,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498355828] [2020-09-11 12:02:12,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:12,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:12,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:12,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:12,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:13,043 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:13,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:13,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:13,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841721196] [2020-09-11 12:02:13,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:13,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:13,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:13,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:13,054 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-11 12:02:13,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:13,260 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-09-11 12:02:13,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:13,261 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:13,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:13,262 INFO L225 Difference]: With dead ends: 136 [2020-09-11 12:02:13,262 INFO L226 Difference]: Without dead ends: 131 [2020-09-11 12:02:13,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:02:13,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-11 12:02:13,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-09-11 12:02:13,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-11 12:02:13,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-09-11 12:02:13,267 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-09-11 12:02:13,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:13,267 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-09-11 12:02:13,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:13,267 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-09-11 12:02:13,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:13,268 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:13,268 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:13,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-09-11 12:02:13,479 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:13,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:13,479 INFO L82 PathProgramCache]: Analyzing trace with hash 2129381756, now seen corresponding path program 15 times [2020-09-11 12:02:13,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:13,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892064611] [2020-09-11 12:02:13,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:13,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892064611] [2020-09-11 12:02:13,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273384202] [2020-09-11 12:02:13,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:13,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:13,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:13,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:13,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:13,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:13,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:13,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748668851] [2020-09-11 12:02:13,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:13,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:13,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:13,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:13,722 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-09-11 12:02:13,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:13,841 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-09-11 12:02:13,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:13,842 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:13,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:13,843 INFO L225 Difference]: With dead ends: 130 [2020-09-11 12:02:13,843 INFO L226 Difference]: Without dead ends: 128 [2020-09-11 12:02:13,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:02:13,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-11 12:02:13,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-09-11 12:02:13,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-11 12:02:13,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-11 12:02:13,847 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-11 12:02:13,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:13,848 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-11 12:02:13,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:13,848 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-11 12:02:13,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:13,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:13,849 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:14,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-11 12:02:14,059 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:14,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:14,060 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044846, now seen corresponding path program 16 times [2020-09-11 12:02:14,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:14,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627245416] [2020-09-11 12:02:14,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:14,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:14,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627245416] [2020-09-11 12:02:14,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769270973] [2020-09-11 12:02:14,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:14,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:14,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:14,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:14,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:14,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:14,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:14,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200688627] [2020-09-11 12:02:14,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:14,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:14,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:14,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:14,288 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-11 12:02:14,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:14,440 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-09-11 12:02:14,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:02:14,441 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:14,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:14,442 INFO L225 Difference]: With dead ends: 131 [2020-09-11 12:02:14,442 INFO L226 Difference]: Without dead ends: 129 [2020-09-11 12:02:14,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:02:14,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-11 12:02:14,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-09-11 12:02:14,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-11 12:02:14,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-11 12:02:14,448 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-11 12:02:14,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:14,448 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-11 12:02:14,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:14,448 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-11 12:02:14,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:14,449 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:14,449 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:14,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-11 12:02:14,660 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:14,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:14,661 INFO L82 PathProgramCache]: Analyzing trace with hash 2130066205, now seen corresponding path program 17 times [2020-09-11 12:02:14,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:14,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491306045] [2020-09-11 12:02:14,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:14,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:14,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:14,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491306045] [2020-09-11 12:02:14,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941466080] [2020-09-11 12:02:14,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:14,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:14,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:14,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:14,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:14,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:14,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:14,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:14,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:14,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418039294] [2020-09-11 12:02:14,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:14,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:14,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:14,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:14,847 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-11 12:02:15,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:15,005 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-09-11 12:02:15,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:15,005 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:15,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:15,006 INFO L225 Difference]: With dead ends: 131 [2020-09-11 12:02:15,007 INFO L226 Difference]: Without dead ends: 126 [2020-09-11 12:02:15,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:02:15,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-11 12:02:15,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-09-11 12:02:15,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-11 12:02:15,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-11 12:02:15,012 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-11 12:02:15,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:15,012 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-11 12:02:15,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:15,012 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-11 12:02:15,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:15,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:15,013 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:15,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:15,224 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:15,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:15,225 INFO L82 PathProgramCache]: Analyzing trace with hash 2130067166, now seen corresponding path program 18 times [2020-09-11 12:02:15,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:15,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265539269] [2020-09-11 12:02:15,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:15,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265539269] [2020-09-11 12:02:15,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989216678] [2020-09-11 12:02:15,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:15,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:15,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:15,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:15,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:15,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:15,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:15,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:15,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301375475] [2020-09-11 12:02:15,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:15,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:15,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:15,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:15,413 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-11 12:02:15,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:15,690 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-09-11 12:02:15,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:02:15,692 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:15,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:15,693 INFO L225 Difference]: With dead ends: 145 [2020-09-11 12:02:15,693 INFO L226 Difference]: Without dead ends: 140 [2020-09-11 12:02:15,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:02:15,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-11 12:02:15,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-09-11 12:02:15,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-11 12:02:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-11 12:02:15,697 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-11 12:02:15,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:15,697 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-11 12:02:15,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:15,698 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-11 12:02:15,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:15,698 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:15,698 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:15,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-09-11 12:02:15,909 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:15,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:15,910 INFO L82 PathProgramCache]: Analyzing trace with hash 2130095996, now seen corresponding path program 19 times [2020-09-11 12:02:15,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:15,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505143947] [2020-09-11 12:02:15,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:15,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505143947] [2020-09-11 12:02:15,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058714387] [2020-09-11 12:02:15,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:16,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:16,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:16,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:16,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:16,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:16,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994486804] [2020-09-11 12:02:16,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:16,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:16,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:16,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:16,118 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-11 12:02:16,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:16,304 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-09-11 12:02:16,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:16,304 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:16,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:16,305 INFO L225 Difference]: With dead ends: 135 [2020-09-11 12:02:16,305 INFO L226 Difference]: Without dead ends: 130 [2020-09-11 12:02:16,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:02:16,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-11 12:02:16,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-09-11 12:02:16,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-11 12:02:16,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-09-11 12:02:16,309 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-09-11 12:02:16,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:16,310 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-09-11 12:02:16,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:16,310 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-09-11 12:02:16,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:16,310 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:16,310 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:16,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:16,520 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:16,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:16,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1822274800, now seen corresponding path program 4 times [2020-09-11 12:02:16,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:16,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170152121] [2020-09-11 12:02:16,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:16,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170152121] [2020-09-11 12:02:16,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364563777] [2020-09-11 12:02:16,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:16,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:16,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:16,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:16,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:16,743 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:16,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:16,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:16,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-09-11 12:02:16,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061492990] [2020-09-11 12:02:16,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:02:16,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:16,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:02:16,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:02:16,772 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-09-11 12:02:16,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:16,905 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-09-11 12:02:16,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:16,906 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-09-11 12:02:16,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:16,907 INFO L225 Difference]: With dead ends: 143 [2020-09-11 12:02:16,908 INFO L226 Difference]: Without dead ends: 138 [2020-09-11 12:02:16,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:02:16,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-11 12:02:16,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-09-11 12:02:16,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-11 12:02:16,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-09-11 12:02:16,912 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-09-11 12:02:16,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:16,912 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-09-11 12:02:16,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:02:16,912 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-09-11 12:02:16,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:16,913 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:16,913 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:17,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-09-11 12:02:17,125 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:17,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:17,126 INFO L82 PathProgramCache]: Analyzing trace with hash 62604888, now seen corresponding path program 10 times [2020-09-11 12:02:17,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:17,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235369434] [2020-09-11 12:02:17,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:17,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:17,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235369434] [2020-09-11 12:02:17,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576440054] [2020-09-11 12:02:17,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:17,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:17,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:17,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:17,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:17,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:17,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:17,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019453413] [2020-09-11 12:02:17,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:17,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:17,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:17,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:17,407 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-09-11 12:02:17,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:17,452 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-09-11 12:02:17,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:02:17,452 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 12:02:17,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:17,453 INFO L225 Difference]: With dead ends: 132 [2020-09-11 12:02:17,453 INFO L226 Difference]: Without dead ends: 129 [2020-09-11 12:02:17,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:17,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-11 12:02:17,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-09-11 12:02:17,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-11 12:02:17,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-11 12:02:17,457 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-11 12:02:17,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:17,458 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-11 12:02:17,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:17,458 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-11 12:02:17,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:17,458 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:17,459 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:17,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-11 12:02:17,668 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:17,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:17,669 INFO L82 PathProgramCache]: Analyzing trace with hash 727540008, now seen corresponding path program 11 times [2020-09-11 12:02:17,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:17,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892287096] [2020-09-11 12:02:17,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:17,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892287096] [2020-09-11 12:02:17,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129297875] [2020-09-11 12:02:17,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:17,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:02:17,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:17,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:17,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:17,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:17,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:17,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10308086] [2020-09-11 12:02:17,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:17,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:17,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:17,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:17,955 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-11 12:02:18,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:18,023 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-09-11 12:02:18,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:18,024 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 12:02:18,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:18,025 INFO L225 Difference]: With dead ends: 143 [2020-09-11 12:02:18,025 INFO L226 Difference]: Without dead ends: 140 [2020-09-11 12:02:18,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:02:18,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-11 12:02:18,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-09-11 12:02:18,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-11 12:02:18,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-11 12:02:18,031 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-11 12:02:18,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:18,031 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-11 12:02:18,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:18,031 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-11 12:02:18,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:18,032 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:18,032 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:18,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-09-11 12:02:18,233 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:18,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:18,234 INFO L82 PathProgramCache]: Analyzing trace with hash 748989528, now seen corresponding path program 12 times [2020-09-11 12:02:18,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:18,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107209581] [2020-09-11 12:02:18,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:18,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107209581] [2020-09-11 12:02:18,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053231901] [2020-09-11 12:02:18,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:18,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:02:18,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:18,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:18,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:18,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:18,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:18,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:18,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177668895] [2020-09-11 12:02:18,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:18,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:18,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:18,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:18,517 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-11 12:02:18,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:18,606 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-09-11 12:02:18,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:18,607 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 12:02:18,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:18,608 INFO L225 Difference]: With dead ends: 142 [2020-09-11 12:02:18,608 INFO L226 Difference]: Without dead ends: 139 [2020-09-11 12:02:18,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:18,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-11 12:02:18,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-09-11 12:02:18,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-11 12:02:18,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-09-11 12:02:18,612 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-09-11 12:02:18,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:18,613 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-09-11 12:02:18,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:18,613 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-09-11 12:02:18,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:18,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:18,613 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:18,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-11 12:02:18,823 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:18,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:18,824 INFO L82 PathProgramCache]: Analyzing trace with hash 749681448, now seen corresponding path program 13 times [2020-09-11 12:02:18,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:18,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016385858] [2020-09-11 12:02:18,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:18,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:18,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016385858] [2020-09-11 12:02:18,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672529004] [2020-09-11 12:02:18,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:18,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:18,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:19,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:19,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:19,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:19,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690390110] [2020-09-11 12:02:19,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:19,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:19,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:19,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:19,050 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-09-11 12:02:19,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:19,168 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-09-11 12:02:19,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:19,168 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 12:02:19,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:19,169 INFO L225 Difference]: With dead ends: 141 [2020-09-11 12:02:19,170 INFO L226 Difference]: Without dead ends: 138 [2020-09-11 12:02:19,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:02:19,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-11 12:02:19,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-09-11 12:02:19,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-11 12:02:19,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-09-11 12:02:19,173 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-09-11 12:02:19,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:19,174 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-09-11 12:02:19,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:19,174 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-09-11 12:02:19,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:19,174 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:19,175 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:19,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-11 12:02:19,384 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:19,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:19,385 INFO L82 PathProgramCache]: Analyzing trace with hash 749703768, now seen corresponding path program 14 times [2020-09-11 12:02:19,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:19,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221562592] [2020-09-11 12:02:19,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:19,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221562592] [2020-09-11 12:02:19,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369955700] [2020-09-11 12:02:19,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:19,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:19,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:19,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:19,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:19,578 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:19,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:19,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:19,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615993056] [2020-09-11 12:02:19,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:19,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:19,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:19,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:19,592 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-09-11 12:02:19,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:19,782 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-11 12:02:19,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:19,783 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 12:02:19,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:19,785 INFO L225 Difference]: With dead ends: 150 [2020-09-11 12:02:19,785 INFO L226 Difference]: Without dead ends: 144 [2020-09-11 12:02:19,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:02:19,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-11 12:02:19,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-09-11 12:02:19,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-11 12:02:19,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-09-11 12:02:19,789 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-09-11 12:02:19,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:19,789 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-09-11 12:02:19,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:19,790 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-09-11 12:02:19,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:19,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:19,790 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:19,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:19,991 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:19,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:19,992 INFO L82 PathProgramCache]: Analyzing trace with hash 920465749, now seen corresponding path program 20 times [2020-09-11 12:02:19,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:19,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470190570] [2020-09-11 12:02:19,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:20,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470190570] [2020-09-11 12:02:20,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821642294] [2020-09-11 12:02:20,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:20,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:20,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:20,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:20,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:20,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:20,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:20,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894769479] [2020-09-11 12:02:20,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:20,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:20,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:20,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:20,244 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-09-11 12:02:20,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:20,306 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-09-11 12:02:20,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:02:20,307 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:20,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:20,308 INFO L225 Difference]: With dead ends: 138 [2020-09-11 12:02:20,308 INFO L226 Difference]: Without dead ends: 136 [2020-09-11 12:02:20,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:20,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-11 12:02:20,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-09-11 12:02:20,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-11 12:02:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-09-11 12:02:20,312 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-09-11 12:02:20,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:20,312 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-09-11 12:02:20,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-09-11 12:02:20,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:20,313 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:20,313 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:20,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-11 12:02:20,519 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:20,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:20,519 INFO L82 PathProgramCache]: Analyzing trace with hash 920466710, now seen corresponding path program 21 times [2020-09-11 12:02:20,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:20,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904332899] [2020-09-11 12:02:20,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:20,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904332899] [2020-09-11 12:02:20,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68607292] [2020-09-11 12:02:20,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:20,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:20,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:20,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:20,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:20,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:20,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:20,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:20,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835648931] [2020-09-11 12:02:20,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:20,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:20,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:20,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:20,786 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-09-11 12:02:20,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:20,919 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-09-11 12:02:20,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:20,919 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:20,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:20,920 INFO L225 Difference]: With dead ends: 145 [2020-09-11 12:02:20,921 INFO L226 Difference]: Without dead ends: 143 [2020-09-11 12:02:20,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:02:20,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-11 12:02:20,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-09-11 12:02:20,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-11 12:02:20,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-09-11 12:02:20,924 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-09-11 12:02:20,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:20,924 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-09-11 12:02:20,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:20,925 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-09-11 12:02:20,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:20,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:20,925 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:21,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-11 12:02:21,133 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:21,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:21,134 INFO L82 PathProgramCache]: Analyzing trace with hash 920495540, now seen corresponding path program 22 times [2020-09-11 12:02:21,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:21,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477948893] [2020-09-11 12:02:21,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:21,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477948893] [2020-09-11 12:02:21,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24780924] [2020-09-11 12:02:21,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:21,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:21,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:21,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:21,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:21,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:21,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:21,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058305234] [2020-09-11 12:02:21,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:21,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:21,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:21,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:21,382 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-09-11 12:02:21,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:21,541 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-11 12:02:21,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:21,541 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:21,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:21,543 INFO L225 Difference]: With dead ends: 150 [2020-09-11 12:02:21,543 INFO L226 Difference]: Without dead ends: 148 [2020-09-11 12:02:21,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:02:21,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-11 12:02:21,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-09-11 12:02:21,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-11 12:02:21,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-09-11 12:02:21,548 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-09-11 12:02:21,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:21,549 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-09-11 12:02:21,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:21,549 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-09-11 12:02:21,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:21,550 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:21,550 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:21,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:21,760 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:21,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:21,761 INFO L82 PathProgramCache]: Analyzing trace with hash 921389270, now seen corresponding path program 23 times [2020-09-11 12:02:21,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:21,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459836112] [2020-09-11 12:02:21,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:21,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459836112] [2020-09-11 12:02:21,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353627390] [2020-09-11 12:02:21,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:21,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:02:21,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:21,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:21,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:22,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:22,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:22,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563165073] [2020-09-11 12:02:22,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:22,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:22,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:22,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:22,006 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-09-11 12:02:22,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:22,150 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-09-11 12:02:22,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:22,150 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:22,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:22,151 INFO L225 Difference]: With dead ends: 148 [2020-09-11 12:02:22,151 INFO L226 Difference]: Without dead ends: 146 [2020-09-11 12:02:22,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:02:22,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-11 12:02:22,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-09-11 12:02:22,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 12:02:22,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-11 12:02:22,157 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-11 12:02:22,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:22,158 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-11 12:02:22,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:22,159 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-11 12:02:22,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:22,160 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:22,160 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:22,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-11 12:02:22,375 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:22,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:22,375 INFO L82 PathProgramCache]: Analyzing trace with hash 921390231, now seen corresponding path program 24 times [2020-09-11 12:02:22,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:22,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923488223] [2020-09-11 12:02:22,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:22,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923488223] [2020-09-11 12:02:22,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052666823] [2020-09-11 12:02:22,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:22,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:22,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:22,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:22,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:22,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:22,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:22,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:22,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656174212] [2020-09-11 12:02:22,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:22,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:22,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:22,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:22,628 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-11 12:02:22,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:22,776 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-09-11 12:02:22,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:22,777 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:22,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:22,778 INFO L225 Difference]: With dead ends: 149 [2020-09-11 12:02:22,778 INFO L226 Difference]: Without dead ends: 147 [2020-09-11 12:02:22,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:02:22,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-11 12:02:22,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-09-11 12:02:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 12:02:22,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-09-11 12:02:22,783 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-09-11 12:02:22,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:22,785 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-09-11 12:02:22,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:22,786 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-09-11 12:02:22,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:22,786 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:22,787 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:22,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:22,997 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:22,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:22,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1557695239, now seen corresponding path program 25 times [2020-09-11 12:02:22,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:22,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345637260] [2020-09-11 12:02:22,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:23,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:23,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345637260] [2020-09-11 12:02:23,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311596623] [2020-09-11 12:02:23,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:23,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:23,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:23,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:23,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:23,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:23,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101175605] [2020-09-11 12:02:23,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:23,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:23,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:23,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:23,270 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-09-11 12:02:23,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:23,340 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-09-11 12:02:23,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:23,340 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:23,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:23,341 INFO L225 Difference]: With dead ends: 152 [2020-09-11 12:02:23,342 INFO L226 Difference]: Without dead ends: 150 [2020-09-11 12:02:23,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:02:23,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-11 12:02:23,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-09-11 12:02:23,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-11 12:02:23,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-09-11 12:02:23,345 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-09-11 12:02:23,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:23,346 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-09-11 12:02:23,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:23,346 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-09-11 12:02:23,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:23,347 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:23,347 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:23,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-11 12:02:23,555 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:23,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:23,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1557696200, now seen corresponding path program 26 times [2020-09-11 12:02:23,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:23,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046535223] [2020-09-11 12:02:23,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:23,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046535223] [2020-09-11 12:02:23,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990887405] [2020-09-11 12:02:23,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:23,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:23,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:23,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:23,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:23,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:23,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:23,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598670734] [2020-09-11 12:02:23,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:23,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:23,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:23,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:23,831 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-09-11 12:02:23,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:24,000 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-09-11 12:02:24,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:02:24,000 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:24,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:24,002 INFO L225 Difference]: With dead ends: 153 [2020-09-11 12:02:24,002 INFO L226 Difference]: Without dead ends: 151 [2020-09-11 12:02:24,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:02:24,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-11 12:02:24,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-09-11 12:02:24,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 12:02:24,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-11 12:02:24,007 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-11 12:02:24,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:24,007 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-11 12:02:24,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:24,008 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-11 12:02:24,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:24,008 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:24,008 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:24,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-09-11 12:02:24,221 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:24,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:24,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1557725030, now seen corresponding path program 27 times [2020-09-11 12:02:24,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:24,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368221963] [2020-09-11 12:02:24,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:24,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:24,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368221963] [2020-09-11 12:02:24,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710051563] [2020-09-11 12:02:24,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:24,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:24,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:24,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:24,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:24,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:24,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:24,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492702797] [2020-09-11 12:02:24,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:24,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:24,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:24,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:24,486 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-11 12:02:24,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:24,665 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-11 12:02:24,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:02:24,665 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:24,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:24,667 INFO L225 Difference]: With dead ends: 156 [2020-09-11 12:02:24,667 INFO L226 Difference]: Without dead ends: 154 [2020-09-11 12:02:24,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:02:24,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-11 12:02:24,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-09-11 12:02:24,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-11 12:02:24,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-09-11 12:02:24,671 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-09-11 12:02:24,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:24,672 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-09-11 12:02:24,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:24,672 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-09-11 12:02:24,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:24,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:24,673 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:24,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-11 12:02:24,882 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:24,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:24,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251029, now seen corresponding path program 28 times [2020-09-11 12:02:24,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:24,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888527241] [2020-09-11 12:02:24,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:24,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888527241] [2020-09-11 12:02:24,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783918108] [2020-09-11 12:02:24,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:25,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:25,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:25,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:25,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:25,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:25,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:25,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763489793] [2020-09-11 12:02:25,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:25,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:25,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:25,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:25,142 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-09-11 12:02:25,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:25,242 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-09-11 12:02:25,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:25,243 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:25,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:25,244 INFO L225 Difference]: With dead ends: 148 [2020-09-11 12:02:25,244 INFO L226 Difference]: Without dead ends: 146 [2020-09-11 12:02:25,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:25,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-11 12:02:25,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-09-11 12:02:25,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 12:02:25,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-11 12:02:25,249 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-11 12:02:25,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:25,249 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-11 12:02:25,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:25,249 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-11 12:02:25,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:25,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:25,250 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:25,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-09-11 12:02:25,457 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:25,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:25,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251990, now seen corresponding path program 29 times [2020-09-11 12:02:25,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:25,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018512224] [2020-09-11 12:02:25,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:25,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018512224] [2020-09-11 12:02:25,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763261900] [2020-09-11 12:02:25,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:25,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:25,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:25,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:25,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:25,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:25,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:25,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505742150] [2020-09-11 12:02:25,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:25,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:25,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:25,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:25,739 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-11 12:02:25,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:25,930 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-09-11 12:02:25,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:25,930 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:25,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:25,931 INFO L225 Difference]: With dead ends: 157 [2020-09-11 12:02:25,932 INFO L226 Difference]: Without dead ends: 155 [2020-09-11 12:02:25,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:02:25,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-11 12:02:25,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-09-11 12:02:25,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 12:02:25,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-09-11 12:02:25,936 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-09-11 12:02:25,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:25,936 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-09-11 12:02:25,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:25,936 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-09-11 12:02:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:25,937 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:25,937 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:26,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:26,146 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:26,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:26,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1578914119, now seen corresponding path program 30 times [2020-09-11 12:02:26,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:26,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462257387] [2020-09-11 12:02:26,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:26,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462257387] [2020-09-11 12:02:26,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713384536] [2020-09-11 12:02:26,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:26,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:26,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:26,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:02:26,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:26,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:26,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 12:02:26,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883044213] [2020-09-11 12:02:26,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:02:26,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:26,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:02:26,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:02:26,338 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-09-11 12:02:26,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:26,450 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-09-11 12:02:26,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:26,451 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 12:02:26,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:26,452 INFO L225 Difference]: With dead ends: 149 [2020-09-11 12:02:26,452 INFO L226 Difference]: Without dead ends: 147 [2020-09-11 12:02:26,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:02:26,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-11 12:02:26,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-09-11 12:02:26,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-11 12:02:26,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-11 12:02:26,459 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-11 12:02:26,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:26,460 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-11 12:02:26,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:02:26,460 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-11 12:02:26,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:26,461 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:26,461 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:26,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-11 12:02:26,674 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:26,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:26,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1578936439, now seen corresponding path program 31 times [2020-09-11 12:02:26,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:26,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249381679] [2020-09-11 12:02:26,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:26,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249381679] [2020-09-11 12:02:26,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952240738] [2020-09-11 12:02:26,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:26,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:26,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:26,974 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:27,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:27,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:27,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66358068] [2020-09-11 12:02:27,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:27,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:27,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:27,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:27,009 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-11 12:02:27,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:27,293 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-09-11 12:02:27,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:27,294 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:27,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:27,295 INFO L225 Difference]: With dead ends: 164 [2020-09-11 12:02:27,295 INFO L226 Difference]: Without dead ends: 159 [2020-09-11 12:02:27,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:27,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-11 12:02:27,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-11 12:02:27,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-11 12:02:27,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-09-11 12:02:27,298 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-09-11 12:02:27,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:27,299 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-09-11 12:02:27,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:27,299 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-09-11 12:02:27,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:27,300 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:27,300 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:27,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-11 12:02:27,501 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:27,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:27,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1578943910, now seen corresponding path program 32 times [2020-09-11 12:02:27,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:27,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681566291] [2020-09-11 12:02:27,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:27,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:27,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681566291] [2020-09-11 12:02:27,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598075469] [2020-09-11 12:02:27,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:27,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:27,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:27,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:27,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:27,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:27,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:27,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606033762] [2020-09-11 12:02:27,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:27,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:27,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:27,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:27,759 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-09-11 12:02:27,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:27,980 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-11 12:02:27,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:02:27,980 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:27,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:27,982 INFO L225 Difference]: With dead ends: 156 [2020-09-11 12:02:27,982 INFO L226 Difference]: Without dead ends: 154 [2020-09-11 12:02:27,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:02:27,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-11 12:02:27,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-09-11 12:02:27,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-11 12:02:27,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-11 12:02:27,986 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-11 12:02:27,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:27,987 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-11 12:02:27,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:27,987 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-11 12:02:27,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:27,987 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:27,987 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:28,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:28,198 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:28,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:28,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1578965269, now seen corresponding path program 33 times [2020-09-11 12:02:28,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:28,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843068714] [2020-09-11 12:02:28,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:28,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843068714] [2020-09-11 12:02:28,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760272568] [2020-09-11 12:02:28,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:28,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:28,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:28,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:28,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:28,425 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:28,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:28,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:28,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:28,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997806585] [2020-09-11 12:02:28,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:28,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:28,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:28,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:28,471 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-11 12:02:28,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:28,879 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-09-11 12:02:28,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:02:28,879 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:28,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:28,881 INFO L225 Difference]: With dead ends: 176 [2020-09-11 12:02:28,881 INFO L226 Difference]: Without dead ends: 171 [2020-09-11 12:02:28,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:02:28,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-11 12:02:28,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-09-11 12:02:28,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-11 12:02:28,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-11 12:02:28,884 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-11 12:02:28,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:28,885 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-11 12:02:28,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:28,885 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-11 12:02:28,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:28,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:28,886 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:29,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-09-11 12:02:29,086 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:29,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:29,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1578966230, now seen corresponding path program 34 times [2020-09-11 12:02:29,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:29,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454999945] [2020-09-11 12:02:29,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:29,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454999945] [2020-09-11 12:02:29,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489225540] [2020-09-11 12:02:29,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:29,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:29,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:29,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:29,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:29,325 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:29,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:29,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:29,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203593983] [2020-09-11 12:02:29,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:29,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:29,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:29,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:29,385 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-11 12:02:29,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:29,653 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-09-11 12:02:29,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:29,653 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:29,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:29,655 INFO L225 Difference]: With dead ends: 166 [2020-09-11 12:02:29,655 INFO L226 Difference]: Without dead ends: 161 [2020-09-11 12:02:29,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:29,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-11 12:02:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-09-11 12:02:29,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 12:02:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-09-11 12:02:29,658 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-09-11 12:02:29,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:29,659 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-09-11 12:02:29,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-09-11 12:02:29,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:29,659 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:29,659 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:29,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:29,868 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:29,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:29,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1579174550, now seen corresponding path program 35 times [2020-09-11 12:02:29,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:29,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444230371] [2020-09-11 12:02:29,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:29,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444230371] [2020-09-11 12:02:29,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579823622] [2020-09-11 12:02:29,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:30,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:30,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:30,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:30,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:30,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:30,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:30,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904744938] [2020-09-11 12:02:30,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:30,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:30,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:30,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:30,173 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-09-11 12:02:30,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:30,376 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-09-11 12:02:30,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:30,376 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:30,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:30,377 INFO L225 Difference]: With dead ends: 163 [2020-09-11 12:02:30,377 INFO L226 Difference]: Without dead ends: 161 [2020-09-11 12:02:30,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:02:30,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-11 12:02:30,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-09-11 12:02:30,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-11 12:02:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-09-11 12:02:30,381 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-09-11 12:02:30,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:30,381 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-09-11 12:02:30,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:30,381 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-09-11 12:02:30,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:30,382 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:30,382 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:30,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-11 12:02:30,583 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:30,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:30,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1579837640, now seen corresponding path program 36 times [2020-09-11 12:02:30,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:30,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324870158] [2020-09-11 12:02:30,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:30,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:30,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324870158] [2020-09-11 12:02:30,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205569255] [2020-09-11 12:02:30,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:30,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:30,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:30,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:30,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:30,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:30,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:30,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149373440] [2020-09-11 12:02:30,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:30,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:30,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:30,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:30,851 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-09-11 12:02:31,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:31,181 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-09-11 12:02:31,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:02:31,182 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:31,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:31,183 INFO L225 Difference]: With dead ends: 170 [2020-09-11 12:02:31,184 INFO L226 Difference]: Without dead ends: 168 [2020-09-11 12:02:31,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:02:31,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-11 12:02:31,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-09-11 12:02:31,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-11 12:02:31,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-09-11 12:02:31,189 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-09-11 12:02:31,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:31,190 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-09-11 12:02:31,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:31,190 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-09-11 12:02:31,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:31,191 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:31,191 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:31,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:31,404 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:31,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:31,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1579858999, now seen corresponding path program 37 times [2020-09-11 12:02:31,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:31,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683273902] [2020-09-11 12:02:31,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:31,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683273902] [2020-09-11 12:02:31,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888679130] [2020-09-11 12:02:31,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:31,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:31,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:31,627 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:31,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:31,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:31,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329631942] [2020-09-11 12:02:31,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:31,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:31,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:31,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:31,638 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-09-11 12:02:31,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:31,981 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-09-11 12:02:31,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:02:31,982 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:31,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:31,983 INFO L225 Difference]: With dead ends: 177 [2020-09-11 12:02:31,983 INFO L226 Difference]: Without dead ends: 172 [2020-09-11 12:02:31,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-11 12:02:31,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-11 12:02:31,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-09-11 12:02:31,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-11 12:02:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-09-11 12:02:31,987 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-09-11 12:02:31,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:31,987 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-09-11 12:02:31,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:31,988 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-09-11 12:02:31,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:31,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:31,988 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:32,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-11 12:02:32,197 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:32,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:32,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859960, now seen corresponding path program 38 times [2020-09-11 12:02:32,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:32,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061469621] [2020-09-11 12:02:32,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:32,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:32,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061469621] [2020-09-11 12:02:32,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384577505] [2020-09-11 12:02:32,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:32,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:32,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:32,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:32,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:32,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:32,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:32,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:32,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850703857] [2020-09-11 12:02:32,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:32,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:32,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:32,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:32,415 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-09-11 12:02:32,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:32,781 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-09-11 12:02:32,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:02:32,782 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:32,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:32,783 INFO L225 Difference]: With dead ends: 190 [2020-09-11 12:02:32,783 INFO L226 Difference]: Without dead ends: 182 [2020-09-11 12:02:32,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:02:32,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-11 12:02:32,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-09-11 12:02:32,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 12:02:32,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-09-11 12:02:32,788 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-09-11 12:02:32,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:32,788 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-09-11 12:02:32,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:32,788 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-09-11 12:02:32,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:32,789 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:32,789 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:32,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-11 12:02:32,999 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:33,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:33,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888790, now seen corresponding path program 39 times [2020-09-11 12:02:33,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:33,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54736420] [2020-09-11 12:02:33,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:33,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54736420] [2020-09-11 12:02:33,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97473053] [2020-09-11 12:02:33,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:33,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:02:33,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:33,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:33,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:33,245 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:33,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:33,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:33,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912941428] [2020-09-11 12:02:33,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:33,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:33,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:33,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:33,257 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-09-11 12:02:33,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:33,682 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-09-11 12:02:33,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:02:33,682 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:33,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:33,684 INFO L225 Difference]: With dead ends: 180 [2020-09-11 12:02:33,684 INFO L226 Difference]: Without dead ends: 175 [2020-09-11 12:02:33,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:02:33,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-11 12:02:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-09-11 12:02:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 12:02:33,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-09-11 12:02:33,687 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-09-11 12:02:33,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:33,687 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-09-11 12:02:33,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:33,688 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-09-11 12:02:33,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:33,688 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:33,688 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:33,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-11 12:02:33,889 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:33,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:33,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1586324390, now seen corresponding path program 40 times [2020-09-11 12:02:33,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:33,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491222059] [2020-09-11 12:02:33,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:33,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:33,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:33,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491222059] [2020-09-11 12:02:33,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174830767] [2020-09-11 12:02:33,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:34,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:34,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:34,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:34,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:34,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:34,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:34,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199936657] [2020-09-11 12:02:34,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:34,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:34,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:34,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:34,153 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-09-11 12:02:34,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:34,332 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-09-11 12:02:34,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:34,333 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:34,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:34,334 INFO L225 Difference]: With dead ends: 164 [2020-09-11 12:02:34,334 INFO L226 Difference]: Without dead ends: 162 [2020-09-11 12:02:34,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:02:34,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-11 12:02:34,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-09-11 12:02:34,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 12:02:34,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-09-11 12:02:34,337 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-09-11 12:02:34,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:34,337 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-09-11 12:02:34,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:34,337 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-09-11 12:02:34,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:34,338 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:34,338 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:34,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-11 12:02:34,540 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:34,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:34,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1586325351, now seen corresponding path program 41 times [2020-09-11 12:02:34,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:34,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833614765] [2020-09-11 12:02:34,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:34,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833614765] [2020-09-11 12:02:34,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082641483] [2020-09-11 12:02:34,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:34,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:34,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:34,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:34,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:34,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:34,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:34,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235902927] [2020-09-11 12:02:34,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:34,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:34,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:34,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:34,796 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-09-11 12:02:34,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:34,971 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-09-11 12:02:34,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:02:34,972 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:34,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:34,974 INFO L225 Difference]: With dead ends: 161 [2020-09-11 12:02:34,974 INFO L226 Difference]: Without dead ends: 159 [2020-09-11 12:02:34,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:02:34,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-11 12:02:34,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-09-11 12:02:34,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 12:02:34,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-09-11 12:02:34,977 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-09-11 12:02:34,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:34,978 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-09-11 12:02:34,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:34,978 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-09-11 12:02:34,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:34,978 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:34,978 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:35,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-11 12:02:35,181 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:35,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:35,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880180, now seen corresponding path program 42 times [2020-09-11 12:02:35,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:35,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173287203] [2020-09-11 12:02:35,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:35,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173287203] [2020-09-11 12:02:35,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104991759] [2020-09-11 12:02:35,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:35,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:02:35,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:35,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:35,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:35,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:35,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:35,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605625997] [2020-09-11 12:02:35,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:35,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:35,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:35,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:35,432 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-09-11 12:02:35,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:35,659 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-09-11 12:02:35,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:02:35,660 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:35,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:35,661 INFO L225 Difference]: With dead ends: 165 [2020-09-11 12:02:35,661 INFO L226 Difference]: Without dead ends: 163 [2020-09-11 12:02:35,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:02:35,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-11 12:02:35,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-09-11 12:02:35,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 12:02:35,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-09-11 12:02:35,665 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-09-11 12:02:35,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:35,666 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-09-11 12:02:35,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:35,666 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-09-11 12:02:35,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:35,666 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:35,667 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:35,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-09-11 12:02:35,877 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:35,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:35,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1606881141, now seen corresponding path program 43 times [2020-09-11 12:02:35,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:35,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769968059] [2020-09-11 12:02:35,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:35,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769968059] [2020-09-11 12:02:35,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61241861] [2020-09-11 12:02:35,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:35,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:35,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:36,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:36,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:36,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:36,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185549164] [2020-09-11 12:02:36,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:36,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:36,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:36,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:36,113 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-09-11 12:02:36,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:36,342 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-09-11 12:02:36,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:02:36,343 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:36,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:36,344 INFO L225 Difference]: With dead ends: 167 [2020-09-11 12:02:36,344 INFO L226 Difference]: Without dead ends: 165 [2020-09-11 12:02:36,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:02:36,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-11 12:02:36,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-09-11 12:02:36,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 12:02:36,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-11 12:02:36,349 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-11 12:02:36,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:36,349 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-11 12:02:36,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:36,349 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-11 12:02:36,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:36,349 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:36,350 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:36,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:36,557 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:36,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:36,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1607543270, now seen corresponding path program 44 times [2020-09-11 12:02:36,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:36,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808924013] [2020-09-11 12:02:36,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:36,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808924013] [2020-09-11 12:02:36,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689200399] [2020-09-11 12:02:36,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:36,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:36,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:36,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:36,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:36,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:36,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:36,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346959530] [2020-09-11 12:02:36,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:36,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:36,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:36,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:36,827 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-11 12:02:37,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:37,139 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-09-11 12:02:37,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:02:37,140 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:37,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:37,141 INFO L225 Difference]: With dead ends: 168 [2020-09-11 12:02:37,141 INFO L226 Difference]: Without dead ends: 166 [2020-09-11 12:02:37,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:02:37,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-11 12:02:37,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-09-11 12:02:37,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 12:02:37,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-11 12:02:37,144 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-11 12:02:37,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:37,145 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-11 12:02:37,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:37,145 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-11 12:02:37,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:37,145 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:37,145 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:37,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:37,346 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:37,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:37,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1607564629, now seen corresponding path program 45 times [2020-09-11 12:02:37,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:37,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743260889] [2020-09-11 12:02:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:37,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743260889] [2020-09-11 12:02:37,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541723949] [2020-09-11 12:02:37,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:37,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:37,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:37,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:37,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:37,561 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:37,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:37,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:37,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935062435] [2020-09-11 12:02:37,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:37,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:37,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:37,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:37,574 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-11 12:02:37,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:37,818 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-09-11 12:02:37,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:37,819 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:37,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:37,821 INFO L225 Difference]: With dead ends: 160 [2020-09-11 12:02:37,821 INFO L226 Difference]: Without dead ends: 155 [2020-09-11 12:02:37,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:37,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-11 12:02:37,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-09-11 12:02:37,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 12:02:37,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-11 12:02:37,825 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-11 12:02:37,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:37,825 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-11 12:02:37,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:37,825 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-11 12:02:37,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:37,826 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:37,826 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:38,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:38,027 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:38,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:38,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1607565590, now seen corresponding path program 46 times [2020-09-11 12:02:38,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:38,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656658147] [2020-09-11 12:02:38,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:38,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:38,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656658147] [2020-09-11 12:02:38,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396087714] [2020-09-11 12:02:38,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:38,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:38,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:38,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:38,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:38,258 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:38,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:38,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:38,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455662462] [2020-09-11 12:02:38,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:38,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:38,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:38,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:38,300 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-11 12:02:38,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:38,713 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-09-11 12:02:38,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:02:38,713 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:38,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:38,715 INFO L225 Difference]: With dead ends: 189 [2020-09-11 12:02:38,715 INFO L226 Difference]: Without dead ends: 181 [2020-09-11 12:02:38,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:02:38,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-09-11 12:02:38,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-09-11 12:02:38,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 12:02:38,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-11 12:02:38,719 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-11 12:02:38,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:38,720 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-11 12:02:38,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:38,720 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-11 12:02:38,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:38,720 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:38,721 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:38,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:38,932 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:38,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:38,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1607573061, now seen corresponding path program 47 times [2020-09-11 12:02:38,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:38,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794939868] [2020-09-11 12:02:38,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:39,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794939868] [2020-09-11 12:02:39,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273724112] [2020-09-11 12:02:39,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:39,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:39,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:39,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:39,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:39,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:39,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:39,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076506590] [2020-09-11 12:02:39,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:39,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:39,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:39,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:39,164 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-11 12:02:39,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:39,472 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-09-11 12:02:39,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:02:39,473 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:39,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:39,474 INFO L225 Difference]: With dead ends: 169 [2020-09-11 12:02:39,474 INFO L226 Difference]: Without dead ends: 167 [2020-09-11 12:02:39,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:02:39,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-11 12:02:39,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-09-11 12:02:39,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 12:02:39,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-11 12:02:39,478 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-11 12:02:39,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:39,478 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-11 12:02:39,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:39,478 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-11 12:02:39,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:39,479 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:39,479 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:39,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-09-11 12:02:39,680 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:39,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:39,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1607594420, now seen corresponding path program 48 times [2020-09-11 12:02:39,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:39,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093941139] [2020-09-11 12:02:39,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:39,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093941139] [2020-09-11 12:02:39,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497396677] [2020-09-11 12:02:39,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:39,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:39,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:39,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:39,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:39,897 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:39,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:39,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:39,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014609231] [2020-09-11 12:02:39,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:39,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:39,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:39,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:39,906 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-11 12:02:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:40,307 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-09-11 12:02:40,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:02:40,308 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:40,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:40,310 INFO L225 Difference]: With dead ends: 192 [2020-09-11 12:02:40,310 INFO L226 Difference]: Without dead ends: 184 [2020-09-11 12:02:40,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:02:40,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-11 12:02:40,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-09-11 12:02:40,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-11 12:02:40,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-09-11 12:02:40,313 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-09-11 12:02:40,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:40,313 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-09-11 12:02:40,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:40,313 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-09-11 12:02:40,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:40,314 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:40,314 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:40,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:40,515 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:40,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:40,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1607595381, now seen corresponding path program 49 times [2020-09-11 12:02:40,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:40,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581534735] [2020-09-11 12:02:40,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:40,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:40,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581534735] [2020-09-11 12:02:40,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991116162] [2020-09-11 12:02:40,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:40,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:40,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:40,749 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:40,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:40,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:40,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:40,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267058200] [2020-09-11 12:02:40,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:40,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:40,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:40,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:40,761 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-09-11 12:02:41,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:41,153 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-09-11 12:02:41,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:02:41,154 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:41,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:41,155 INFO L225 Difference]: With dead ends: 180 [2020-09-11 12:02:41,156 INFO L226 Difference]: Without dead ends: 175 [2020-09-11 12:02:41,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-11 12:02:41,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-11 12:02:41,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-09-11 12:02:41,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-11 12:02:41,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-09-11 12:02:41,159 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-09-11 12:02:41,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:41,159 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-09-11 12:02:41,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:41,159 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-09-11 12:02:41,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:41,160 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:41,160 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:41,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-09-11 12:02:41,363 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:41,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:41,364 INFO L82 PathProgramCache]: Analyzing trace with hash -655922238, now seen corresponding path program 5 times [2020-09-11 12:02:41,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:41,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819624465] [2020-09-11 12:02:41,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:41,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819624465] [2020-09-11 12:02:41,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933673610] [2020-09-11 12:02:41,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:41,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:02:41,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:41,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:41,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:41,642 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:41,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:41,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-11 12:02:41,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430792536] [2020-09-11 12:02:41,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:02:41,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:41,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:02:41,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:02:41,672 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-09-11 12:02:41,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:41,849 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-09-11 12:02:41,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:02:41,850 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-09-11 12:02:41,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:41,851 INFO L225 Difference]: With dead ends: 164 [2020-09-11 12:02:41,851 INFO L226 Difference]: Without dead ends: 159 [2020-09-11 12:02:41,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:02:41,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-11 12:02:41,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-11 12:02:41,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-11 12:02:41,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-09-11 12:02:41,855 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-09-11 12:02:41,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:41,855 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-09-11 12:02:41,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:02:41,855 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-09-11 12:02:41,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:41,855 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:41,855 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:42,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:42,064 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:42,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:42,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1940751883, now seen corresponding path program 15 times [2020-09-11 12:02:42,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:42,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672030007] [2020-09-11 12:02:42,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:42,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672030007] [2020-09-11 12:02:42,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289386370] [2020-09-11 12:02:42,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:42,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:02:42,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:42,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:42,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:42,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:42,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:42,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881210495] [2020-09-11 12:02:42,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:42,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:42,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:42,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:42,394 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-09-11 12:02:42,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:42,445 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-11 12:02:42,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:42,445 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 12:02:42,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:42,446 INFO L225 Difference]: With dead ends: 156 [2020-09-11 12:02:42,447 INFO L226 Difference]: Without dead ends: 153 [2020-09-11 12:02:42,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:42,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-11 12:02:42,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-09-11 12:02:42,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-11 12:02:42,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-11 12:02:42,450 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-11 12:02:42,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:42,450 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-11 12:02:42,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:42,450 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-11 12:02:42,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:42,451 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:42,451 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:42,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-11 12:02:42,660 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:42,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:42,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1078904123, now seen corresponding path program 16 times [2020-09-11 12:02:42,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:42,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562088604] [2020-09-11 12:02:42,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:42,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562088604] [2020-09-11 12:02:42,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546452541] [2020-09-11 12:02:42,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:42,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:42,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:42,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:42,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:42,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:42,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:42,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105311486] [2020-09-11 12:02:42,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:42,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:42,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:42,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:42,992 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-11 12:02:43,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:43,073 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-09-11 12:02:43,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:43,074 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 12:02:43,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:43,076 INFO L225 Difference]: With dead ends: 170 [2020-09-11 12:02:43,076 INFO L226 Difference]: Without dead ends: 167 [2020-09-11 12:02:43,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:02:43,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-11 12:02:43,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-09-11 12:02:43,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-11 12:02:43,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-11 12:02:43,081 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-11 12:02:43,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:43,083 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-11 12:02:43,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:43,084 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-11 12:02:43,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:43,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:43,085 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:43,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:43,285 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:43,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:43,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1743839243, now seen corresponding path program 17 times [2020-09-11 12:02:43,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:43,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990070391] [2020-09-11 12:02:43,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:43,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990070391] [2020-09-11 12:02:43,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121808538] [2020-09-11 12:02:43,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:43,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:02:43,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:43,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:43,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:43,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:43,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:43,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923797865] [2020-09-11 12:02:43,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:43,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:43,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:43,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:43,605 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-11 12:02:43,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:43,709 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-09-11 12:02:43,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:43,710 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 12:02:43,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:43,711 INFO L225 Difference]: With dead ends: 169 [2020-09-11 12:02:43,711 INFO L226 Difference]: Without dead ends: 166 [2020-09-11 12:02:43,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:02:43,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-11 12:02:43,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-09-11 12:02:43,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-11 12:02:43,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-09-11 12:02:43,715 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-09-11 12:02:43,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:43,716 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-09-11 12:02:43,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:43,716 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-09-11 12:02:43,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:43,716 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:43,717 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:43,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:43,928 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:43,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:43,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1765288763, now seen corresponding path program 18 times [2020-09-11 12:02:43,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:43,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459579627] [2020-09-11 12:02:43,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:44,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459579627] [2020-09-11 12:02:44,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971963342] [2020-09-11 12:02:44,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:44,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:02:44,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:44,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:44,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:44,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:44,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:44,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001100913] [2020-09-11 12:02:44,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:44,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:44,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:44,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:44,235 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-09-11 12:02:44,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:44,360 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-09-11 12:02:44,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:02:44,361 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 12:02:44,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:44,363 INFO L225 Difference]: With dead ends: 168 [2020-09-11 12:02:44,363 INFO L226 Difference]: Without dead ends: 165 [2020-09-11 12:02:44,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:02:44,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-11 12:02:44,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-09-11 12:02:44,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-11 12:02:44,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-09-11 12:02:44,367 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-09-11 12:02:44,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:44,367 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-09-11 12:02:44,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:44,367 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-09-11 12:02:44,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:44,368 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:44,368 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:44,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-09-11 12:02:44,573 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:44,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:44,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1765980683, now seen corresponding path program 19 times [2020-09-11 12:02:44,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:44,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53088546] [2020-09-11 12:02:44,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:44,687 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:44,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53088546] [2020-09-11 12:02:44,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451024982] [2020-09-11 12:02:44,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:44,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:44,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:44,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:44,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:44,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258691756] [2020-09-11 12:02:44,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:44,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:44,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:44,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:44,874 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-09-11 12:02:45,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:45,031 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-09-11 12:02:45,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:45,032 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 12:02:45,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:45,034 INFO L225 Difference]: With dead ends: 167 [2020-09-11 12:02:45,034 INFO L226 Difference]: Without dead ends: 164 [2020-09-11 12:02:45,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:02:45,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-09-11 12:02:45,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-09-11 12:02:45,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-11 12:02:45,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-09-11 12:02:45,037 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-09-11 12:02:45,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:45,037 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-09-11 12:02:45,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:45,037 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-09-11 12:02:45,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:45,038 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:45,038 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:45,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:45,239 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:45,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:45,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1766003003, now seen corresponding path program 20 times [2020-09-11 12:02:45,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:45,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120791061] [2020-09-11 12:02:45,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:45,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120791061] [2020-09-11 12:02:45,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733947352] [2020-09-11 12:02:45,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:45,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:45,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:45,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:45,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:45,492 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:45,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:45,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:45,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933537826] [2020-09-11 12:02:45,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:45,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:45,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:45,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:45,512 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-09-11 12:02:45,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:45,742 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-09-11 12:02:45,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:02:45,742 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 12:02:45,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:45,744 INFO L225 Difference]: With dead ends: 176 [2020-09-11 12:02:45,744 INFO L226 Difference]: Without dead ends: 170 [2020-09-11 12:02:45,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:45,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-11 12:02:45,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-09-11 12:02:45,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-11 12:02:45,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-09-11 12:02:45,748 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-09-11 12:02:45,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:45,748 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-09-11 12:02:45,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:45,748 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-09-11 12:02:45,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:45,749 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:45,749 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:45,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:45,950 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:45,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:45,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1530333459, now seen corresponding path program 50 times [2020-09-11 12:02:45,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:45,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10450414] [2020-09-11 12:02:45,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:45,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:46,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10450414] [2020-09-11 12:02:46,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446266270] [2020-09-11 12:02:46,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:46,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:46,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:46,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:46,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:46,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:46,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:46,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239728399] [2020-09-11 12:02:46,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:46,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:46,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:46,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:46,261 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-09-11 12:02:46,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:46,317 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-09-11 12:02:46,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:46,317 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:46,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:46,319 INFO L225 Difference]: With dead ends: 163 [2020-09-11 12:02:46,319 INFO L226 Difference]: Without dead ends: 161 [2020-09-11 12:02:46,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:46,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-11 12:02:46,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-09-11 12:02:46,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-11 12:02:46,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-09-11 12:02:46,323 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-09-11 12:02:46,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:46,323 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-09-11 12:02:46,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:46,323 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-09-11 12:02:46,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:46,324 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:46,324 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:46,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-09-11 12:02:46,524 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:46,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:46,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1530332498, now seen corresponding path program 51 times [2020-09-11 12:02:46,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:46,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265968030] [2020-09-11 12:02:46,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:46,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265968030] [2020-09-11 12:02:46,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120524380] [2020-09-11 12:02:46,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:46,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:46,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:46,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:46,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:46,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:46,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:46,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168103507] [2020-09-11 12:02:46,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:46,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:46,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:46,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:46,922 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-09-11 12:02:47,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:47,151 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-09-11 12:02:47,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:47,152 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:47,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:47,154 INFO L225 Difference]: With dead ends: 172 [2020-09-11 12:02:47,154 INFO L226 Difference]: Without dead ends: 170 [2020-09-11 12:02:47,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:02:47,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-11 12:02:47,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-09-11 12:02:47,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-11 12:02:47,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-11 12:02:47,160 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-11 12:02:47,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:47,160 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-11 12:02:47,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:47,161 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-11 12:02:47,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:47,162 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:47,162 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:47,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:47,375 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:47,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:47,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1530303668, now seen corresponding path program 52 times [2020-09-11 12:02:47,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:47,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332599096] [2020-09-11 12:02:47,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:47,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332599096] [2020-09-11 12:02:47,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114100986] [2020-09-11 12:02:47,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:47,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:47,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:47,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:47,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:47,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:47,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:47,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004614756] [2020-09-11 12:02:47,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:47,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:47,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:47,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:47,732 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-11 12:02:47,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:47,946 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-11 12:02:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:47,951 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:47,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:47,952 INFO L225 Difference]: With dead ends: 179 [2020-09-11 12:02:47,952 INFO L226 Difference]: Without dead ends: 177 [2020-09-11 12:02:47,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:02:47,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-11 12:02:47,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-09-11 12:02:47,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-11 12:02:47,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-09-11 12:02:47,955 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-09-11 12:02:47,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:47,955 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-09-11 12:02:47,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:47,955 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-09-11 12:02:47,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:47,956 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:47,956 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:48,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-09-11 12:02:48,157 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:48,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:48,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1529409938, now seen corresponding path program 53 times [2020-09-11 12:02:48,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:48,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483049888] [2020-09-11 12:02:48,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:48,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483049888] [2020-09-11 12:02:48,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139626586] [2020-09-11 12:02:48,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:48,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:48,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:48,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:48,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:48,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:48,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:48,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255987129] [2020-09-11 12:02:48,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:48,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:48,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:48,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:48,471 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-09-11 12:02:48,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:48,677 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-11 12:02:48,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:02:48,678 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:48,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:48,679 INFO L225 Difference]: With dead ends: 179 [2020-09-11 12:02:48,679 INFO L226 Difference]: Without dead ends: 177 [2020-09-11 12:02:48,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:48,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-11 12:02:48,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-09-11 12:02:48,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-11 12:02:48,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-11 12:02:48,684 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-11 12:02:48,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:48,684 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-11 12:02:48,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:48,684 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-11 12:02:48,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:48,685 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:48,685 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:48,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-11 12:02:48,896 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:48,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:48,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1529408977, now seen corresponding path program 54 times [2020-09-11 12:02:48,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:48,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745447850] [2020-09-11 12:02:48,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:48,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:49,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745447850] [2020-09-11 12:02:49,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725252686] [2020-09-11 12:02:49,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:49,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:49,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:49,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:49,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:49,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:49,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:49,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022628315] [2020-09-11 12:02:49,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:49,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:49,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:49,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:49,189 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-11 12:02:49,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:49,431 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-09-11 12:02:49,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:49,432 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:49,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:49,433 INFO L225 Difference]: With dead ends: 184 [2020-09-11 12:02:49,433 INFO L226 Difference]: Without dead ends: 182 [2020-09-11 12:02:49,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:49,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-11 12:02:49,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-09-11 12:02:49,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-11 12:02:49,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-09-11 12:02:49,436 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-09-11 12:02:49,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:49,436 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-09-11 12:02:49,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:49,436 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-09-11 12:02:49,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:49,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:49,437 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:49,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-09-11 12:02:49,638 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:49,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:49,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1529380147, now seen corresponding path program 55 times [2020-09-11 12:02:49,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:49,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409232075] [2020-09-11 12:02:49,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:49,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409232075] [2020-09-11 12:02:49,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936090690] [2020-09-11 12:02:49,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:49,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:49,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:49,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:49,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:49,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495882342] [2020-09-11 12:02:49,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:49,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:49,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:49,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:49,938 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-09-11 12:02:50,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:50,183 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-09-11 12:02:50,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:50,184 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:50,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:50,186 INFO L225 Difference]: With dead ends: 179 [2020-09-11 12:02:50,186 INFO L226 Difference]: Without dead ends: 177 [2020-09-11 12:02:50,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:50,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-11 12:02:50,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-09-11 12:02:50,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-11 12:02:50,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-09-11 12:02:50,190 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-09-11 12:02:50,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:50,190 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-09-11 12:02:50,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:50,191 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-09-11 12:02:50,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:50,191 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:50,191 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:50,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:50,399 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:50,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:50,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1501704308, now seen corresponding path program 56 times [2020-09-11 12:02:50,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:50,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364329755] [2020-09-11 12:02:50,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:50,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364329755] [2020-09-11 12:02:50,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461019097] [2020-09-11 12:02:50,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:50,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:50,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:50,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:50,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:50,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:50,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:50,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007230024] [2020-09-11 12:02:50,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:50,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:50,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:50,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:50,711 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-09-11 12:02:50,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:50,907 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-09-11 12:02:50,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:50,908 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:50,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:50,910 INFO L225 Difference]: With dead ends: 176 [2020-09-11 12:02:50,910 INFO L226 Difference]: Without dead ends: 174 [2020-09-11 12:02:50,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:02:50,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-09-11 12:02:50,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-09-11 12:02:50,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 12:02:50,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-09-11 12:02:50,913 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-09-11 12:02:50,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:50,913 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-09-11 12:02:50,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:50,913 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-09-11 12:02:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:50,913 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:50,913 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:51,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:51,114 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:51,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:51,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1501703347, now seen corresponding path program 57 times [2020-09-11 12:02:51,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:51,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229958807] [2020-09-11 12:02:51,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:51,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229958807] [2020-09-11 12:02:51,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968013225] [2020-09-11 12:02:51,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:51,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:02:51,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:51,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:51,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:51,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:51,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:51,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619932996] [2020-09-11 12:02:51,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:51,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:51,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:51,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:51,430 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-09-11 12:02:51,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:51,669 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-09-11 12:02:51,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:51,669 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:51,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:51,671 INFO L225 Difference]: With dead ends: 185 [2020-09-11 12:02:51,671 INFO L226 Difference]: Without dead ends: 183 [2020-09-11 12:02:51,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:51,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-11 12:02:51,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-09-11 12:02:51,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 12:02:51,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-09-11 12:02:51,674 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-09-11 12:02:51,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:51,675 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-09-11 12:02:51,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:51,675 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-09-11 12:02:51,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:51,675 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:51,675 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:51,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:51,876 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:51,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:51,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1501674517, now seen corresponding path program 58 times [2020-09-11 12:02:51,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:51,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802694003] [2020-09-11 12:02:51,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:52,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:52,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802694003] [2020-09-11 12:02:52,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209282939] [2020-09-11 12:02:52,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:52,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:52,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:52,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:52,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:52,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:52,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:52,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872302377] [2020-09-11 12:02:52,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:52,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:52,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:52,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:52,181 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-09-11 12:02:52,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:52,411 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-09-11 12:02:52,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:52,411 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:52,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:52,412 INFO L225 Difference]: With dead ends: 185 [2020-09-11 12:02:52,412 INFO L226 Difference]: Without dead ends: 183 [2020-09-11 12:02:52,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:52,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-11 12:02:52,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-09-11 12:02:52,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-11 12:02:52,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-09-11 12:02:52,416 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-09-11 12:02:52,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:52,416 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-09-11 12:02:52,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:52,417 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-09-11 12:02:52,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:52,417 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:52,417 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:52,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:52,627 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:52,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:52,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911547, now seen corresponding path program 59 times [2020-09-11 12:02:52,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:52,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749074072] [2020-09-11 12:02:52,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:52,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:52,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749074072] [2020-09-11 12:02:52,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035291148] [2020-09-11 12:02:52,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:52,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:02:52,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:52,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:52,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:52,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:52,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:52,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906888709] [2020-09-11 12:02:52,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:52,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:52,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:52,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:52,990 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-09-11 12:02:53,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:53,066 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-09-11 12:02:53,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:53,067 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:53,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:53,068 INFO L225 Difference]: With dead ends: 182 [2020-09-11 12:02:53,068 INFO L226 Difference]: Without dead ends: 180 [2020-09-11 12:02:53,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:02:53,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-11 12:02:53,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-09-11 12:02:53,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 12:02:53,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-09-11 12:02:53,072 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-09-11 12:02:53,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:53,072 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-09-11 12:02:53,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:53,072 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-09-11 12:02:53,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:53,073 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:53,073 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:53,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-09-11 12:02:53,284 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:53,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:53,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1043912508, now seen corresponding path program 60 times [2020-09-11 12:02:53,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:53,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861857187] [2020-09-11 12:02:53,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:53,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861857187] [2020-09-11 12:02:53,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91883572] [2020-09-11 12:02:53,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:53,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:53,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:53,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:53,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:53,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:53,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:53,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110564145] [2020-09-11 12:02:53,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:53,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:53,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:53,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:53,616 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-09-11 12:02:53,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:53,833 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-09-11 12:02:53,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:02:53,833 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:53,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:53,835 INFO L225 Difference]: With dead ends: 185 [2020-09-11 12:02:53,835 INFO L226 Difference]: Without dead ends: 183 [2020-09-11 12:02:53,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:02:53,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-11 12:02:53,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-09-11 12:02:53,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:02:53,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-11 12:02:53,839 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-11 12:02:53,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:53,839 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-11 12:02:53,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:53,839 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-11 12:02:53,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:53,840 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:53,840 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:54,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:54,050 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:54,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:54,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1043941338, now seen corresponding path program 61 times [2020-09-11 12:02:54,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:54,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878130223] [2020-09-11 12:02:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:54,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878130223] [2020-09-11 12:02:54,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546734643] [2020-09-11 12:02:54,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:54,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:54,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:54,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:54,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:54,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804972610] [2020-09-11 12:02:54,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:54,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:54,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:54,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:54,423 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-11 12:02:54,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:54,684 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-09-11 12:02:54,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:02:54,684 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:54,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:54,686 INFO L225 Difference]: With dead ends: 191 [2020-09-11 12:02:54,686 INFO L226 Difference]: Without dead ends: 189 [2020-09-11 12:02:54,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:54,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-11 12:02:54,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-09-11 12:02:54,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 12:02:54,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-09-11 12:02:54,690 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-09-11 12:02:54,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:54,690 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-09-11 12:02:54,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:54,691 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-09-11 12:02:54,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:54,691 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:54,691 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:54,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:54,900 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:54,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:54,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1044835068, now seen corresponding path program 62 times [2020-09-11 12:02:54,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:54,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309673049] [2020-09-11 12:02:54,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:55,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309673049] [2020-09-11 12:02:55,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740580584] [2020-09-11 12:02:55,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:55,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:55,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:55,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:55,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:55,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:55,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:55,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218859818] [2020-09-11 12:02:55,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:55,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:55,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:55,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:55,194 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-09-11 12:02:55,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:55,476 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-09-11 12:02:55,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:02:55,477 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:55,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:55,478 INFO L225 Difference]: With dead ends: 187 [2020-09-11 12:02:55,478 INFO L226 Difference]: Without dead ends: 185 [2020-09-11 12:02:55,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:02:55,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-11 12:02:55,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-09-11 12:02:55,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:02:55,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-11 12:02:55,482 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-11 12:02:55,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:55,482 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-11 12:02:55,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:55,483 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-11 12:02:55,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:55,483 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:55,483 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:55,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-09-11 12:02:55,685 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:55,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:55,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1044836029, now seen corresponding path program 63 times [2020-09-11 12:02:55,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:55,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029279599] [2020-09-11 12:02:55,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:55,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029279599] [2020-09-11 12:02:55,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726856486] [2020-09-11 12:02:55,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:55,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:55,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:55,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:55,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:55,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:55,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:55,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:55,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370076327] [2020-09-11 12:02:55,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:55,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:55,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:55,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:55,989 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-11 12:02:56,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:56,289 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-09-11 12:02:56,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:02:56,290 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:56,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:56,292 INFO L225 Difference]: With dead ends: 198 [2020-09-11 12:02:56,292 INFO L226 Difference]: Without dead ends: 196 [2020-09-11 12:02:56,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:02:56,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-11 12:02:56,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-09-11 12:02:56,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:02:56,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-09-11 12:02:56,295 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-09-11 12:02:56,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:56,295 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-09-11 12:02:56,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:56,296 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-09-11 12:02:56,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:56,296 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:56,296 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:56,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:56,497 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:56,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:56,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1044864859, now seen corresponding path program 64 times [2020-09-11 12:02:56,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:56,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713914073] [2020-09-11 12:02:56,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:56,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713914073] [2020-09-11 12:02:56,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035884222] [2020-09-11 12:02:56,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:56,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:56,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:56,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:56,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:56,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:56,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:56,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128422911] [2020-09-11 12:02:56,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:56,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:56,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:56,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:56,806 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-09-11 12:02:57,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:57,128 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-09-11 12:02:57,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:02:57,129 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:57,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:57,130 INFO L225 Difference]: With dead ends: 189 [2020-09-11 12:02:57,130 INFO L226 Difference]: Without dead ends: 187 [2020-09-11 12:02:57,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:02:57,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-11 12:02:57,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-09-11 12:02:57,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 12:02:57,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-09-11 12:02:57,134 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-09-11 12:02:57,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:57,134 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-09-11 12:02:57,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:57,134 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-09-11 12:02:57,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:57,135 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:57,135 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:57,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-09-11 12:02:57,341 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:57,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:57,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141037, now seen corresponding path program 65 times [2020-09-11 12:02:57,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:57,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637241637] [2020-09-11 12:02:57,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:57,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637241637] [2020-09-11 12:02:57,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79509608] [2020-09-11 12:02:57,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:57,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:02:57,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:57,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:57,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:57,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:57,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:57,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70050039] [2020-09-11 12:02:57,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:57,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:57,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:57,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:57,686 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-09-11 12:02:57,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:57,800 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-09-11 12:02:57,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:57,801 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:57,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:57,802 INFO L225 Difference]: With dead ends: 178 [2020-09-11 12:02:57,803 INFO L226 Difference]: Without dead ends: 176 [2020-09-11 12:02:57,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:02:57,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-09-11 12:02:57,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-09-11 12:02:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 12:02:57,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-09-11 12:02:57,806 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-09-11 12:02:57,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:57,806 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-09-11 12:02:57,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:57,806 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-09-11 12:02:57,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:57,806 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:57,806 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:58,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:58,007 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:58,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:58,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141998, now seen corresponding path program 66 times [2020-09-11 12:02:58,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:58,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902380317] [2020-09-11 12:02:58,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:58,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:58,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902380317] [2020-09-11 12:02:58,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800247943] [2020-09-11 12:02:58,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:58,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:58,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:58,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:58,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:58,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:58,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:58,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916632027] [2020-09-11 12:02:58,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:58,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:58,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:58,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:58,345 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-09-11 12:02:58,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:58,592 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-09-11 12:02:58,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:02:58,593 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:58,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:58,594 INFO L225 Difference]: With dead ends: 193 [2020-09-11 12:02:58,594 INFO L226 Difference]: Without dead ends: 191 [2020-09-11 12:02:58,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:58,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-11 12:02:58,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-09-11 12:02:58,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 12:02:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-09-11 12:02:58,598 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-09-11 12:02:58,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:58,598 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-09-11 12:02:58,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:58,598 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-09-11 12:02:58,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:58,599 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:58,599 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:58,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-09-11 12:02:58,800 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:58,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:58,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1681170828, now seen corresponding path program 67 times [2020-09-11 12:02:58,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:58,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955213103] [2020-09-11 12:02:58,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:58,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955213103] [2020-09-11 12:02:58,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913931765] [2020-09-11 12:02:58,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:58,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:58,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:59,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:59,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:59,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077321392] [2020-09-11 12:02:59,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:59,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:59,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:59,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:59,190 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-09-11 12:02:59,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:59,489 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-09-11 12:02:59,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:02:59,490 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:59,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:59,492 INFO L225 Difference]: With dead ends: 195 [2020-09-11 12:02:59,492 INFO L226 Difference]: Without dead ends: 193 [2020-09-11 12:02:59,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:02:59,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-11 12:02:59,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-09-11 12:02:59,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 12:02:59,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-09-11 12:02:59,495 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-09-11 12:02:59,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:59,496 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-09-11 12:02:59,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:59,496 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-09-11 12:02:59,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:59,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:59,496 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:59,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:59,702 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:59,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:59,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1701696827, now seen corresponding path program 68 times [2020-09-11 12:02:59,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:59,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365852250] [2020-09-11 12:02:59,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:59,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365852250] [2020-09-11 12:02:59,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973232352] [2020-09-11 12:02:59,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:59,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:59,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:59,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:59,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:00,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:00,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:00,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538300765] [2020-09-11 12:03:00,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:00,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:00,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:00,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:00,025 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-09-11 12:03:00,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:00,177 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-09-11 12:03:00,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:03:00,177 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:00,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:00,179 INFO L225 Difference]: With dead ends: 174 [2020-09-11 12:03:00,179 INFO L226 Difference]: Without dead ends: 172 [2020-09-11 12:03:00,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:03:00,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-11 12:03:00,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-09-11 12:03:00,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:03:00,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-09-11 12:03:00,183 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-09-11 12:03:00,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:00,183 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-09-11 12:03:00,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:00,183 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-09-11 12:03:00,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:00,184 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:00,184 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:00,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-09-11 12:03:00,385 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:00,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:00,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1701697788, now seen corresponding path program 69 times [2020-09-11 12:03:00,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:00,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005019907] [2020-09-11 12:03:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:00,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005019907] [2020-09-11 12:03:00,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808210299] [2020-09-11 12:03:00,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:00,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:03:00,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:00,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:00,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:00,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:00,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:00,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251169409] [2020-09-11 12:03:00,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:00,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:00,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:00,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:00,690 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-09-11 12:03:00,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:00,968 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-09-11 12:03:00,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:03:00,969 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:00,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:00,971 INFO L225 Difference]: With dead ends: 189 [2020-09-11 12:03:00,971 INFO L226 Difference]: Without dead ends: 187 [2020-09-11 12:03:00,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:03:00,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-11 12:03:00,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-09-11 12:03:00,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 12:03:00,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-09-11 12:03:00,974 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-09-11 12:03:00,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:00,974 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-09-11 12:03:00,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:00,975 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-09-11 12:03:00,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:00,975 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:00,975 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:01,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:01,184 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:01,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:01,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1702359917, now seen corresponding path program 70 times [2020-09-11 12:03:01,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:01,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886441238] [2020-09-11 12:03:01,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:01,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886441238] [2020-09-11 12:03:01,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689672426] [2020-09-11 12:03:01,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:01,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:03:01,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:01,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:01,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:01,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:01,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:01,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767780626] [2020-09-11 12:03:01,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:01,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:01,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:01,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:01,494 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-09-11 12:03:01,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:01,654 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-09-11 12:03:01,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:03:01,654 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:01,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:01,656 INFO L225 Difference]: With dead ends: 175 [2020-09-11 12:03:01,656 INFO L226 Difference]: Without dead ends: 173 [2020-09-11 12:03:01,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:03:01,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-11 12:03:01,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-09-11 12:03:01,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 12:03:01,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-11 12:03:01,659 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-11 12:03:01,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:01,660 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-11 12:03:01,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:01,660 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-11 12:03:01,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:01,660 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:01,661 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:01,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:01,863 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:01,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:01,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1702382237, now seen corresponding path program 71 times [2020-09-11 12:03:01,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:01,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208373669] [2020-09-11 12:03:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:01,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208373669] [2020-09-11 12:03:01,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609732395] [2020-09-11 12:03:01,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:02,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:03:02,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:02,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:02,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:02,141 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:03:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:02,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:02,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:02,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564015348] [2020-09-11 12:03:02,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:02,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:02,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:02,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:02,184 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-11 12:03:02,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:02,551 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-09-11 12:03:02,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:03:02,552 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:02,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:02,553 INFO L225 Difference]: With dead ends: 195 [2020-09-11 12:03:02,554 INFO L226 Difference]: Without dead ends: 190 [2020-09-11 12:03:02,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:03:02,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-11 12:03:02,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-09-11 12:03:02,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 12:03:02,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-11 12:03:02,557 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-11 12:03:02,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:02,557 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-11 12:03:02,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:02,557 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-11 12:03:02,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:02,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:02,558 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:02,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:02,758 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:02,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:02,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1702389708, now seen corresponding path program 72 times [2020-09-11 12:03:02,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:02,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289702561] [2020-09-11 12:03:02,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:02,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289702561] [2020-09-11 12:03:02,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5015958] [2020-09-11 12:03:02,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:02,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:03:02,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:02,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:02,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:03,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:03,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:03,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574339358] [2020-09-11 12:03:03,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:03,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:03,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:03,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:03,063 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-11 12:03:03,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:03,371 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-09-11 12:03:03,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:03:03,372 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:03,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:03,374 INFO L225 Difference]: With dead ends: 187 [2020-09-11 12:03:03,374 INFO L226 Difference]: Without dead ends: 185 [2020-09-11 12:03:03,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:03:03,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-11 12:03:03,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-09-11 12:03:03,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 12:03:03,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-11 12:03:03,377 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-11 12:03:03,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:03,377 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-11 12:03:03,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:03,378 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-11 12:03:03,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:03,378 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:03,378 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:03,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:03,579 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:03,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:03,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1702411067, now seen corresponding path program 73 times [2020-09-11 12:03:03,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:03,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271805150] [2020-09-11 12:03:03,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:03,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271805150] [2020-09-11 12:03:03,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359992751] [2020-09-11 12:03:03,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:03,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:03,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:03,842 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:03:03,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:03,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:03,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:03,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860667355] [2020-09-11 12:03:03,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:03,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:03,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:03,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:03,893 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-11 12:03:04,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:04,417 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-09-11 12:03:04,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:03:04,418 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:04,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:04,420 INFO L225 Difference]: With dead ends: 212 [2020-09-11 12:03:04,420 INFO L226 Difference]: Without dead ends: 207 [2020-09-11 12:03:04,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-09-11 12:03:04,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-11 12:03:04,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-11 12:03:04,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 12:03:04,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-11 12:03:04,424 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-11 12:03:04,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:04,424 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-11 12:03:04,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:04,424 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-11 12:03:04,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:04,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:04,425 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:04,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-09-11 12:03:04,626 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:04,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:04,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1702412028, now seen corresponding path program 74 times [2020-09-11 12:03:04,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:04,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343989267] [2020-09-11 12:03:04,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:04,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343989267] [2020-09-11 12:03:04,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682135938] [2020-09-11 12:03:04,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:04,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:03:04,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:04,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:04,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:04,905 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:03:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:04,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:04,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:04,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905300587] [2020-09-11 12:03:04,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:04,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:04,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:04,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:04,932 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-11 12:03:05,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:05,305 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-11 12:03:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:03:05,306 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:05,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:05,307 INFO L225 Difference]: With dead ends: 202 [2020-09-11 12:03:05,307 INFO L226 Difference]: Without dead ends: 197 [2020-09-11 12:03:05,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:03:05,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-11 12:03:05,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-09-11 12:03:05,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 12:03:05,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-09-11 12:03:05,311 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-09-11 12:03:05,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:05,311 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-09-11 12:03:05,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:05,312 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-09-11 12:03:05,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:05,312 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:05,312 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:05,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:05,522 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:05,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:05,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1702620348, now seen corresponding path program 75 times [2020-09-11 12:03:05,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:05,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808634089] [2020-09-11 12:03:05,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:05,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:05,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808634089] [2020-09-11 12:03:05,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250866813] [2020-09-11 12:03:05,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:05,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:03:05,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:05,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:05,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:06,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:06,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:06,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18713848] [2020-09-11 12:03:06,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:06,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:06,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:06,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:06,347 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-09-11 12:03:06,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:06,682 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-09-11 12:03:06,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:03:06,682 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:06,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:06,683 INFO L225 Difference]: With dead ends: 198 [2020-09-11 12:03:06,684 INFO L226 Difference]: Without dead ends: 196 [2020-09-11 12:03:06,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:03:06,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-11 12:03:06,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-09-11 12:03:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 12:03:06,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-11 12:03:06,687 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-11 12:03:06,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:06,688 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-11 12:03:06,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:06,688 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-11 12:03:06,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:06,689 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:06,689 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:06,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-11 12:03:06,890 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:06,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:06,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1703283438, now seen corresponding path program 76 times [2020-09-11 12:03:06,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:06,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205246130] [2020-09-11 12:03:06,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:06,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205246130] [2020-09-11 12:03:06,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886028328] [2020-09-11 12:03:06,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:07,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:03:07,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:07,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:07,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:07,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:07,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:07,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056886844] [2020-09-11 12:03:07,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:07,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:07,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:07,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:07,255 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-11 12:03:07,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:07,732 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-09-11 12:03:07,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:03:07,732 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:07,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:07,734 INFO L225 Difference]: With dead ends: 209 [2020-09-11 12:03:07,734 INFO L226 Difference]: Without dead ends: 207 [2020-09-11 12:03:07,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-09-11 12:03:07,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-11 12:03:07,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-11 12:03:07,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 12:03:07,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-11 12:03:07,738 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-11 12:03:07,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:07,738 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-11 12:03:07,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:07,738 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-11 12:03:07,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:07,738 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:07,738 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:07,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-11 12:03:07,939 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:07,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:07,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1703304797, now seen corresponding path program 77 times [2020-09-11 12:03:07,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:07,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335826922] [2020-09-11 12:03:07,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:08,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335826922] [2020-09-11 12:03:08,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780487534] [2020-09-11 12:03:08,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:08,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:03:08,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:08,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:08,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:08,210 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:03:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:08,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:08,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:08,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230834849] [2020-09-11 12:03:08,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:08,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:08,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:08,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:08,256 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-11 12:03:08,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:08,888 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-09-11 12:03:08,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:03:08,889 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:08,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:08,890 INFO L225 Difference]: With dead ends: 217 [2020-09-11 12:03:08,891 INFO L226 Difference]: Without dead ends: 212 [2020-09-11 12:03:08,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-09-11 12:03:08,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-11 12:03:08,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-09-11 12:03:08,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-11 12:03:08,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-09-11 12:03:08,895 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-09-11 12:03:08,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:08,895 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-09-11 12:03:08,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:08,895 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-09-11 12:03:08,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:08,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:08,896 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:09,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-09-11 12:03:09,104 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:09,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:09,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1703305758, now seen corresponding path program 78 times [2020-09-11 12:03:09,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:09,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968131075] [2020-09-11 12:03:09,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:09,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968131075] [2020-09-11 12:03:09,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668163528] [2020-09-11 12:03:09,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:09,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:03:09,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:09,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:09,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:11,446 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:03:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:11,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:11,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:11,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811074608] [2020-09-11 12:03:11,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:11,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:11,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:11,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-09-11 12:03:11,495 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-09-11 12:03:15,841 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-11 12:03:20,090 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-09-11 12:03:20,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:20,568 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-09-11 12:03:20,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:03:20,569 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:20,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:20,570 INFO L225 Difference]: With dead ends: 236 [2020-09-11 12:03:20,570 INFO L226 Difference]: Without dead ends: 228 [2020-09-11 12:03:20,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-09-11 12:03:20,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-11 12:03:20,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-09-11 12:03:20,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 12:03:20,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-09-11 12:03:20,574 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-09-11 12:03:20,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:20,574 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-09-11 12:03:20,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:20,574 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-09-11 12:03:20,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:20,575 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:20,575 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:20,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-11 12:03:20,776 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:20,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:20,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1703334588, now seen corresponding path program 79 times [2020-09-11 12:03:20,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:20,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898988395] [2020-09-11 12:03:20,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:20,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:20,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898988395] [2020-09-11 12:03:20,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020683649] [2020-09-11 12:03:20,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:20,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:20,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:21,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:03:21,095 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:03:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:21,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:21,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:21,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663028026] [2020-09-11 12:03:21,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:21,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:21,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:21,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:21,135 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-09-11 12:03:21,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:21,766 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-09-11 12:03:21,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:03:21,767 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:21,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:21,768 INFO L225 Difference]: With dead ends: 219 [2020-09-11 12:03:21,769 INFO L226 Difference]: Without dead ends: 214 [2020-09-11 12:03:21,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-09-11 12:03:21,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-11 12:03:21,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-09-11 12:03:21,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 12:03:21,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-09-11 12:03:21,773 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-09-11 12:03:21,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:21,773 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-09-11 12:03:21,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:21,773 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-09-11 12:03:21,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:21,774 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:21,774 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:21,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:21,975 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:21,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:21,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1709770188, now seen corresponding path program 80 times [2020-09-11 12:03:21,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:21,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144227784] [2020-09-11 12:03:21,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:22,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144227784] [2020-09-11 12:03:22,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453671491] [2020-09-11 12:03:22,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:22,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:03:22,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:22,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:22,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:22,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:22,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:22,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145855859] [2020-09-11 12:03:22,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:22,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:22,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:22,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:22,289 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-09-11 12:03:22,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:22,607 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-09-11 12:03:22,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:03:22,607 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:22,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:22,608 INFO L225 Difference]: With dead ends: 197 [2020-09-11 12:03:22,608 INFO L226 Difference]: Without dead ends: 195 [2020-09-11 12:03:22,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:03:22,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-11 12:03:22,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-09-11 12:03:22,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 12:03:22,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-09-11 12:03:22,612 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-09-11 12:03:22,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:22,612 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-09-11 12:03:22,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:22,613 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-09-11 12:03:22,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:22,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:22,613 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:22,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:22,816 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:22,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:22,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1709771149, now seen corresponding path program 81 times [2020-09-11 12:03:22,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:22,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133601186] [2020-09-11 12:03:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:22,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:22,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133601186] [2020-09-11 12:03:22,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048036830] [2020-09-11 12:03:22,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:22,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:03:22,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:22,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:22,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:23,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:23,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:23,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106114162] [2020-09-11 12:03:23,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:23,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:23,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:23,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:23,113 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-09-11 12:03:23,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:23,426 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-09-11 12:03:23,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:03:23,427 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:23,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:23,428 INFO L225 Difference]: With dead ends: 202 [2020-09-11 12:03:23,428 INFO L226 Difference]: Without dead ends: 200 [2020-09-11 12:03:23,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:03:23,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-11 12:03:23,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-09-11 12:03:23,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 12:03:23,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-09-11 12:03:23,431 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-09-11 12:03:23,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:23,431 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-09-11 12:03:23,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:23,432 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-09-11 12:03:23,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:23,432 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:23,432 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:23,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-09-11 12:03:23,633 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:23,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:23,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1709799979, now seen corresponding path program 82 times [2020-09-11 12:03:23,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:23,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646656225] [2020-09-11 12:03:23,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:23,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646656225] [2020-09-11 12:03:23,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345446609] [2020-09-11 12:03:23,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:23,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:03:23,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:23,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:23,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:23,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:23,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:23,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184532638] [2020-09-11 12:03:23,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:23,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:23,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:23,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:23,963 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-09-11 12:03:24,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:24,312 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-09-11 12:03:24,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:03:24,313 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:24,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:24,313 INFO L225 Difference]: With dead ends: 197 [2020-09-11 12:03:24,314 INFO L226 Difference]: Without dead ends: 195 [2020-09-11 12:03:24,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:03:24,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-11 12:03:24,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-09-11 12:03:24,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:03:24,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-09-11 12:03:24,318 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-09-11 12:03:24,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:24,318 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-09-11 12:03:24,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:24,318 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-09-11 12:03:24,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:24,318 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:24,318 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:24,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-11 12:03:24,519 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:24,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:24,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1730325978, now seen corresponding path program 83 times [2020-09-11 12:03:24,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:24,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732587911] [2020-09-11 12:03:24,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:24,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732587911] [2020-09-11 12:03:24,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918096295] [2020-09-11 12:03:24,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:24,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:03:24,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:24,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:24,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:24,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:24,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:24,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242815282] [2020-09-11 12:03:24,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:24,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:24,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:24,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:24,867 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-09-11 12:03:25,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:25,487 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-09-11 12:03:25,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:03:25,488 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:25,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:25,489 INFO L225 Difference]: With dead ends: 214 [2020-09-11 12:03:25,489 INFO L226 Difference]: Without dead ends: 212 [2020-09-11 12:03:25,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-09-11 12:03:25,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-11 12:03:25,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-09-11 12:03:25,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 12:03:25,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-09-11 12:03:25,495 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-09-11 12:03:25,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:25,496 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-09-11 12:03:25,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:25,496 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-09-11 12:03:25,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:25,497 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:25,497 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:25,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-11 12:03:25,709 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:25,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:25,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1730326939, now seen corresponding path program 84 times [2020-09-11 12:03:25,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:25,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801630966] [2020-09-11 12:03:25,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:25,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801630966] [2020-09-11 12:03:25,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394310753] [2020-09-11 12:03:25,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:25,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:03:25,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:25,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:25,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:26,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:26,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:26,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489610259] [2020-09-11 12:03:26,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:26,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:26,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:26,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:26,064 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-09-11 12:03:26,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:26,481 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-09-11 12:03:26,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:03:26,482 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:26,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:26,483 INFO L225 Difference]: With dead ends: 217 [2020-09-11 12:03:26,483 INFO L226 Difference]: Without dead ends: 215 [2020-09-11 12:03:26,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:03:26,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-11 12:03:26,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-09-11 12:03:26,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 12:03:26,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-11 12:03:26,486 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-11 12:03:26,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:26,486 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-11 12:03:26,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:26,487 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-11 12:03:26,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:26,487 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:26,487 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:26,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:26,688 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:26,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:26,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1730989068, now seen corresponding path program 85 times [2020-09-11 12:03:26,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:26,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566801365] [2020-09-11 12:03:26,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:26,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:26,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566801365] [2020-09-11 12:03:26,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223058977] [2020-09-11 12:03:26,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:26,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:26,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:26,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:26,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:26,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549261983] [2020-09-11 12:03:26,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:26,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:26,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:26,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:26,993 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-11 12:03:27,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:27,481 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-09-11 12:03:27,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:03:27,482 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:27,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:27,483 INFO L225 Difference]: With dead ends: 211 [2020-09-11 12:03:27,483 INFO L226 Difference]: Without dead ends: 209 [2020-09-11 12:03:27,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-09-11 12:03:27,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-11 12:03:27,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-09-11 12:03:27,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-11 12:03:27,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-11 12:03:27,488 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-11 12:03:27,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:27,488 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-11 12:03:27,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:27,488 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-11 12:03:27,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:27,489 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:27,489 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:27,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:27,691 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:27,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:27,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1731010427, now seen corresponding path program 86 times [2020-09-11 12:03:27,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:27,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613079756] [2020-09-11 12:03:27,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:27,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:27,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613079756] [2020-09-11 12:03:27,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833909533] [2020-09-11 12:03:27,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:27,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:03:27,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:27,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:27,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:27,970 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:03:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:27,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:27,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:27,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434414250] [2020-09-11 12:03:27,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:27,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:27,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:27,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:27,983 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-11 12:03:28,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:28,558 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-09-11 12:03:28,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:03:28,558 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:28,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:28,559 INFO L225 Difference]: With dead ends: 211 [2020-09-11 12:03:28,559 INFO L226 Difference]: Without dead ends: 206 [2020-09-11 12:03:28,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-09-11 12:03:28,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-11 12:03:28,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-09-11 12:03:28,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-11 12:03:28,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-11 12:03:28,563 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-11 12:03:28,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:28,563 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-11 12:03:28,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:28,563 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-11 12:03:28,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:28,563 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:28,563 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:28,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-11 12:03:28,764 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:28,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:28,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1731011388, now seen corresponding path program 87 times [2020-09-11 12:03:28,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:28,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302625989] [2020-09-11 12:03:28,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:28,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:28,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302625989] [2020-09-11 12:03:28,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654548688] [2020-09-11 12:03:28,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:28,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:03:28,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:28,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:28,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:29,049 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:03:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:29,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:29,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:29,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186589757] [2020-09-11 12:03:29,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:29,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:29,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:29,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:29,099 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-11 12:03:29,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:29,813 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-09-11 12:03:29,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:03:29,814 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:29,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:29,815 INFO L225 Difference]: With dead ends: 227 [2020-09-11 12:03:29,815 INFO L226 Difference]: Without dead ends: 222 [2020-09-11 12:03:29,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 12:03:29,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-11 12:03:29,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-09-11 12:03:29,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 12:03:29,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-11 12:03:29,818 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-11 12:03:29,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:29,819 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-11 12:03:29,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:29,819 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-11 12:03:29,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:29,819 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:29,819 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:30,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-09-11 12:03:30,020 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:30,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:30,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1731018859, now seen corresponding path program 88 times [2020-09-11 12:03:30,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:30,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704317563] [2020-09-11 12:03:30,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:30,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:30,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704317563] [2020-09-11 12:03:30,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164633426] [2020-09-11 12:03:30,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:30,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:03:30,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:30,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:30,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:30,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:30,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:30,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136869769] [2020-09-11 12:03:30,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:30,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:30,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:30,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:30,331 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-11 12:03:30,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:30,892 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-09-11 12:03:30,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:03:30,893 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:30,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:30,894 INFO L225 Difference]: With dead ends: 221 [2020-09-11 12:03:30,894 INFO L226 Difference]: Without dead ends: 219 [2020-09-11 12:03:30,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-09-11 12:03:30,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-11 12:03:30,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-09-11 12:03:30,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-11 12:03:30,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-11 12:03:30,898 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-11 12:03:30,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:30,899 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-11 12:03:30,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:30,899 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-11 12:03:30,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:30,899 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:30,899 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:31,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:31,106 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:31,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:31,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1731040218, now seen corresponding path program 89 times [2020-09-11 12:03:31,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:31,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392317501] [2020-09-11 12:03:31,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:31,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392317501] [2020-09-11 12:03:31,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885270927] [2020-09-11 12:03:31,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:31,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:03:31,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:31,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:31,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:31,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:03:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:31,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:31,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:31,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121961280] [2020-09-11 12:03:31,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:31,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:31,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:31,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:31,398 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-11 12:03:32,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:32,109 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-09-11 12:03:32,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:03:32,110 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:32,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:32,111 INFO L225 Difference]: With dead ends: 240 [2020-09-11 12:03:32,111 INFO L226 Difference]: Without dead ends: 232 [2020-09-11 12:03:32,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 12:03:32,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-11 12:03:32,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-09-11 12:03:32,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-11 12:03:32,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-09-11 12:03:32,114 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-09-11 12:03:32,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:32,115 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-09-11 12:03:32,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:32,115 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-09-11 12:03:32,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:32,115 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:32,115 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:32,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-11 12:03:32,316 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:32,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:32,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041179, now seen corresponding path program 90 times [2020-09-11 12:03:32,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:32,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224596050] [2020-09-11 12:03:32,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:32,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:32,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224596050] [2020-09-11 12:03:32,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273214465] [2020-09-11 12:03:32,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:32,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:03:32,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:32,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:32,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:32,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:03:32,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:32,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:32,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:32,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135377806] [2020-09-11 12:03:32,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:32,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:32,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:32,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:32,660 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-09-11 12:03:33,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:33,571 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-09-11 12:03:33,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:03:33,572 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:33,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:33,573 INFO L225 Difference]: With dead ends: 238 [2020-09-11 12:03:33,574 INFO L226 Difference]: Without dead ends: 230 [2020-09-11 12:03:33,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 12:03:33,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-09-11 12:03:33,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-09-11 12:03:33,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:03:33,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-11 12:03:33,579 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-11 12:03:33,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:33,580 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-11 12:03:33,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:33,580 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-11 12:03:33,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:33,581 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:33,581 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:33,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:33,795 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:33,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:33,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1731249499, now seen corresponding path program 91 times [2020-09-11 12:03:33,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:33,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348640268] [2020-09-11 12:03:33,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:33,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348640268] [2020-09-11 12:03:33,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451507168] [2020-09-11 12:03:33,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:33,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:33,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:34,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:34,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:34,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:34,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865513347] [2020-09-11 12:03:34,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:34,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:34,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:34,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:34,186 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-11 12:03:34,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:34,569 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-09-11 12:03:34,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:03:34,570 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:34,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:34,572 INFO L225 Difference]: With dead ends: 195 [2020-09-11 12:03:34,572 INFO L226 Difference]: Without dead ends: 193 [2020-09-11 12:03:34,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:03:34,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-11 12:03:34,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-09-11 12:03:34,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:03:34,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-11 12:03:34,577 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-11 12:03:34,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:34,578 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-11 12:03:34,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:34,578 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-11 12:03:34,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:34,579 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:34,579 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:34,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-09-11 12:03:34,790 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:34,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:34,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1731912589, now seen corresponding path program 92 times [2020-09-11 12:03:34,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:34,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011811726] [2020-09-11 12:03:34,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:34,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011811726] [2020-09-11 12:03:34,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566327772] [2020-09-11 12:03:34,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:34,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:03:34,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:34,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:34,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:35,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:35,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:35,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:35,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961476696] [2020-09-11 12:03:35,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:35,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:35,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:35,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:35,127 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-11 12:03:35,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:35,671 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-09-11 12:03:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:03:35,672 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:35,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:35,673 INFO L225 Difference]: With dead ends: 206 [2020-09-11 12:03:35,673 INFO L226 Difference]: Without dead ends: 204 [2020-09-11 12:03:35,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-09-11 12:03:35,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-11 12:03:35,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-09-11 12:03:35,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 12:03:35,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-09-11 12:03:35,677 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-09-11 12:03:35,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:35,677 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-09-11 12:03:35,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:35,677 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-09-11 12:03:35,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:35,678 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:35,678 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:35,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:35,879 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:35,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:35,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1731934909, now seen corresponding path program 93 times [2020-09-11 12:03:35,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:35,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325892186] [2020-09-11 12:03:35,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:35,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:35,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325892186] [2020-09-11 12:03:35,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204928118] [2020-09-11 12:03:35,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:36,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:03:36,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:36,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:36,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:36,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:03:37,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:37,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:37,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-11 12:03:37,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8336387] [2020-09-11 12:03:37,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:03:37,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:37,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:03:37,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-09-11 12:03:37,279 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-09-11 12:03:39,766 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 25 [2020-09-11 12:04:02,603 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 29 [2020-09-11 12:04:29,582 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-09-11 12:04:52,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:04:52,725 INFO L93 Difference]: Finished difference Result 252 states and 593 transitions. [2020-09-11 12:04:52,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 12:04:52,726 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-09-11 12:04:52,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:04:52,727 INFO L225 Difference]: With dead ends: 252 [2020-09-11 12:04:52,727 INFO L226 Difference]: Without dead ends: 247 [2020-09-11 12:04:52,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-09-11 12:04:52,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-09-11 12:04:52,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 139. [2020-09-11 12:04:52,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 12:04:52,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-09-11 12:04:52,732 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-09-11 12:04:52,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:04:52,732 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-09-11 12:04:52,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:04:52,732 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-09-11 12:04:52,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:04:52,733 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:04:52,733 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:04:52,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-09-11 12:04:52,943 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:04:52,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:04:52,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1931415228, now seen corresponding path program 94 times [2020-09-11 12:04:52,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:04:52,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436603277] [2020-09-11 12:04:52,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:04:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:04:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:53,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436603277] [2020-09-11 12:04:53,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837390824] [2020-09-11 12:04:53,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:04:53,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:04:53,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:04:53,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:04:53,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:04:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:53,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:04:53,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:04:53,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385528903] [2020-09-11 12:04:53,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:04:53,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:04:53,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:04:53,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:04:53,268 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-09-11 12:04:53,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:04:53,533 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-09-11 12:04:53,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:04:53,534 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:04:53,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:04:53,535 INFO L225 Difference]: With dead ends: 194 [2020-09-11 12:04:53,535 INFO L226 Difference]: Without dead ends: 192 [2020-09-11 12:04:53,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:04:53,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-11 12:04:53,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-09-11 12:04:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 12:04:53,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-09-11 12:04:53,538 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-09-11 12:04:53,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:04:53,538 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-09-11 12:04:53,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:04:53,538 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-09-11 12:04:53,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:04:53,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:04:53,539 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:04:53,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:04:53,740 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:04:53,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:04:53,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1931416189, now seen corresponding path program 95 times [2020-09-11 12:04:53,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:04:53,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444623194] [2020-09-11 12:04:53,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:04:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:04:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:53,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444623194] [2020-09-11 12:04:53,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552683347] [2020-09-11 12:04:53,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:04:53,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:04:53,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:04:53,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:04:53,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:04:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:54,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:04:54,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:04:54,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450244918] [2020-09-11 12:04:54,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:04:54,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:04:54,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:04:54,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:04:54,097 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-09-11 12:04:54,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:04:54,488 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-09-11 12:04:54,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:04:54,489 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:04:54,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:04:54,490 INFO L225 Difference]: With dead ends: 205 [2020-09-11 12:04:54,490 INFO L226 Difference]: Without dead ends: 203 [2020-09-11 12:04:54,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:04:54,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-09-11 12:04:54,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-09-11 12:04:54,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:04:54,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-09-11 12:04:54,495 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-09-11 12:04:54,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:04:54,495 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-09-11 12:04:54,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:04:54,495 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-09-11 12:04:54,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:04:54,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:04:54,496 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:04:54,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:04:54,697 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:04:54,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:04:54,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1931445019, now seen corresponding path program 96 times [2020-09-11 12:04:54,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:04:54,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167912242] [2020-09-11 12:04:54,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:04:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:04:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:54,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167912242] [2020-09-11 12:04:54,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776379976] [2020-09-11 12:04:54,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:04:54,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:04:54,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:04:54,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:04:54,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:04:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:55,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:04:55,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:04:55,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361559818] [2020-09-11 12:04:55,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:04:55,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:04:55,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:04:55,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:04:55,010 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-09-11 12:04:55,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:04:55,357 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-09-11 12:04:55,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:04:55,358 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:04:55,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:04:55,358 INFO L225 Difference]: With dead ends: 201 [2020-09-11 12:04:55,358 INFO L226 Difference]: Without dead ends: 199 [2020-09-11 12:04:55,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:04:55,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-11 12:04:55,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-09-11 12:04:55,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-11 12:04:55,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-09-11 12:04:55,361 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-09-11 12:04:55,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:04:55,361 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-09-11 12:04:55,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:04:55,362 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-09-11 12:04:55,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:04:55,362 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:04:55,362 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:04:55,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:04:55,563 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:04:55,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:04:55,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1726322578, now seen corresponding path program 97 times [2020-09-11 12:04:55,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:04:55,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377105673] [2020-09-11 12:04:55,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:04:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:04:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:55,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377105673] [2020-09-11 12:04:55,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224988627] [2020-09-11 12:04:55,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:04:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:04:55,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:04:55,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:04:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:55,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:04:55,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:04:55,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860995196] [2020-09-11 12:04:55,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:04:55,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:04:55,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:04:55,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:04:55,948 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-09-11 12:04:56,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:04:56,314 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-09-11 12:04:56,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:04:56,316 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:04:56,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:04:56,317 INFO L225 Difference]: With dead ends: 194 [2020-09-11 12:04:56,317 INFO L226 Difference]: Without dead ends: 192 [2020-09-11 12:04:56,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:04:56,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-11 12:04:56,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-09-11 12:04:56,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 12:04:56,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-09-11 12:04:56,322 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-09-11 12:04:56,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:04:56,323 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-09-11 12:04:56,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:04:56,323 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-09-11 12:04:56,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:04:56,324 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:04:56,324 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:04:56,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-11 12:04:56,536 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:04:56,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:04:56,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1726321617, now seen corresponding path program 98 times [2020-09-11 12:04:56,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:04:56,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946707878] [2020-09-11 12:04:56,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:04:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:04:56,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:56,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946707878] [2020-09-11 12:04:56,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095088528] [2020-09-11 12:04:56,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:04:56,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:04:56,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:04:56,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:04:56,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:04:56,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:56,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:04:56,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:04:56,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623383679] [2020-09-11 12:04:56,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:04:56,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:04:56,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:04:56,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:04:56,900 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-09-11 12:04:57,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:04:57,357 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-09-11 12:04:57,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:04:57,358 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:04:57,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:04:57,359 INFO L225 Difference]: With dead ends: 209 [2020-09-11 12:04:57,359 INFO L226 Difference]: Without dead ends: 207 [2020-09-11 12:04:57,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:04:57,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-11 12:04:57,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-09-11 12:04:57,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 12:04:57,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-09-11 12:04:57,363 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-09-11 12:04:57,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:04:57,363 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-09-11 12:04:57,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:04:57,363 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-09-11 12:04:57,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:04:57,364 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:04:57,364 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:04:57,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:04:57,573 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:04:57,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:04:57,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1726292787, now seen corresponding path program 99 times [2020-09-11 12:04:57,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:04:57,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142115248] [2020-09-11 12:04:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:04:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:04:57,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:57,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142115248] [2020-09-11 12:04:57,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922247203] [2020-09-11 12:04:57,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:04:57,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:04:57,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:04:57,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:04:57,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:04:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:57,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:04:57,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:04:57,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520517963] [2020-09-11 12:04:57,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:04:57,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:04:57,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:04:57,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:04:57,927 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-09-11 12:04:58,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:04:58,350 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-09-11 12:04:58,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:04:58,351 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:04:58,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:04:58,352 INFO L225 Difference]: With dead ends: 202 [2020-09-11 12:04:58,352 INFO L226 Difference]: Without dead ends: 200 [2020-09-11 12:04:58,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:04:58,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-11 12:04:58,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-09-11 12:04:58,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 12:04:58,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-11 12:04:58,355 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-11 12:04:58,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:04:58,356 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-11 12:04:58,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:04:58,356 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-11 12:04:58,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:04:58,356 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:04:58,356 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:04:58,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-11 12:04:58,557 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:04:58,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:04:58,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1705766788, now seen corresponding path program 100 times [2020-09-11 12:04:58,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:04:58,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958126120] [2020-09-11 12:04:58,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:04:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:04:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:58,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958126120] [2020-09-11 12:04:58,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659393452] [2020-09-11 12:04:58,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:04:58,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:04:58,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:04:58,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:04:58,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:04:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:58,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:04:58,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:04:58,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637826002] [2020-09-11 12:04:58,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:04:58,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:04:58,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:04:58,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:04:58,894 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-09-11 12:04:59,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:04:59,297 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-09-11 12:04:59,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:04:59,298 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:04:59,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:04:59,299 INFO L225 Difference]: With dead ends: 201 [2020-09-11 12:04:59,299 INFO L226 Difference]: Without dead ends: 199 [2020-09-11 12:04:59,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:04:59,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-11 12:04:59,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-09-11 12:04:59,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 12:04:59,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-09-11 12:04:59,303 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-09-11 12:04:59,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:04:59,303 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-09-11 12:04:59,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:04:59,304 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-09-11 12:04:59,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:04:59,304 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:04:59,304 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:04:59,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-11 12:04:59,505 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:04:59,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:04:59,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1705765827, now seen corresponding path program 101 times [2020-09-11 12:04:59,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:04:59,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150844630] [2020-09-11 12:04:59,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:04:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:04:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:59,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150844630] [2020-09-11 12:04:59,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445966714] [2020-09-11 12:04:59,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:04:59,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:04:59,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:04:59,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:04:59,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:04:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:59,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:04:59,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:04:59,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523615233] [2020-09-11 12:04:59,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:04:59,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:04:59,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:04:59,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:04:59,853 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-09-11 12:05:00,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:00,405 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-09-11 12:05:00,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:05:00,406 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:00,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:00,407 INFO L225 Difference]: With dead ends: 215 [2020-09-11 12:05:00,407 INFO L226 Difference]: Without dead ends: 213 [2020-09-11 12:05:00,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-11 12:05:00,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-11 12:05:00,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-09-11 12:05:00,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:05:00,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-11 12:05:00,411 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-11 12:05:00,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:00,411 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-11 12:05:00,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:00,412 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-11 12:05:00,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:00,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:00,412 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:00,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:00,620 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:00,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:00,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1705103698, now seen corresponding path program 102 times [2020-09-11 12:05:00,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:00,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194873453] [2020-09-11 12:05:00,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:00,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194873453] [2020-09-11 12:05:00,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343545678] [2020-09-11 12:05:00,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:00,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:05:00,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:00,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:00,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:00,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:00,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:00,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707282126] [2020-09-11 12:05:00,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:00,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:00,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:00,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:00,967 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-11 12:05:01,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:01,455 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-09-11 12:05:01,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:05:01,456 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:01,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:01,457 INFO L225 Difference]: With dead ends: 196 [2020-09-11 12:05:01,457 INFO L226 Difference]: Without dead ends: 194 [2020-09-11 12:05:01,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:05:01,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-11 12:05:01,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-09-11 12:05:01,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 12:05:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-11 12:05:01,462 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-11 12:05:01,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:01,462 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-11 12:05:01,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:01,463 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-11 12:05:01,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:01,463 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:01,463 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:01,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:01,666 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:01,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:01,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1705082339, now seen corresponding path program 103 times [2020-09-11 12:05:01,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:01,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971856332] [2020-09-11 12:05:01,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:01,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971856332] [2020-09-11 12:05:01,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255070777] [2020-09-11 12:05:01,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:01,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:01,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:01,956 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:05:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:01,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:01,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:01,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350788338] [2020-09-11 12:05:01,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:01,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:01,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:01,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:01,971 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-11 12:05:02,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:02,362 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-09-11 12:05:02,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:05:02,363 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:02,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:02,364 INFO L225 Difference]: With dead ends: 191 [2020-09-11 12:05:02,364 INFO L226 Difference]: Without dead ends: 186 [2020-09-11 12:05:02,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:05:02,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-11 12:05:02,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-09-11 12:05:02,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 12:05:02,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-11 12:05:02,368 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-11 12:05:02,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:02,368 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-11 12:05:02,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:02,369 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-11 12:05:02,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:02,369 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:02,369 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:02,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-11 12:05:02,570 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:02,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:02,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081378, now seen corresponding path program 104 times [2020-09-11 12:05:02,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:02,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212884789] [2020-09-11 12:05:02,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:02,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212884789] [2020-09-11 12:05:02,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231852331] [2020-09-11 12:05:02,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:02,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:05:02,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:02,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:02,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:02,884 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:05:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:02,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:02,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:02,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066195866] [2020-09-11 12:05:02,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:02,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:02,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:02,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:02,935 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-11 12:05:03,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:03,631 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-09-11 12:05:03,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:05:03,632 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:03,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:03,633 INFO L225 Difference]: With dead ends: 232 [2020-09-11 12:05:03,633 INFO L226 Difference]: Without dead ends: 227 [2020-09-11 12:05:03,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-09-11 12:05:03,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-11 12:05:03,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-09-11 12:05:03,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:05:03,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-11 12:05:03,636 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-11 12:05:03,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:03,636 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-11 12:05:03,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:03,636 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-11 12:05:03,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:03,637 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:03,637 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:03,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:03,838 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:03,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:03,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1705073907, now seen corresponding path program 105 times [2020-09-11 12:05:03,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:03,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188773967] [2020-09-11 12:05:03,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:03,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188773967] [2020-09-11 12:05:03,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009343298] [2020-09-11 12:05:03,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:03,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:05:03,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:03,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:03,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:04,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:04,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:04,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956445803] [2020-09-11 12:05:04,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:04,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:04,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:04,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:04,157 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-11 12:05:04,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:04,828 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-09-11 12:05:04,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:05:04,829 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:04,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:04,830 INFO L225 Difference]: With dead ends: 222 [2020-09-11 12:05:04,830 INFO L226 Difference]: Without dead ends: 220 [2020-09-11 12:05:04,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-09-11 12:05:04,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-11 12:05:04,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-09-11 12:05:04,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 12:05:04,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-11 12:05:04,834 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-11 12:05:04,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:04,834 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-11 12:05:04,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:04,834 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-11 12:05:04,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:04,834 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:04,835 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:05,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:05,036 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:05,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:05,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1705052548, now seen corresponding path program 106 times [2020-09-11 12:05:05,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:05,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367317096] [2020-09-11 12:05:05,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:05,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367317096] [2020-09-11 12:05:05,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425346486] [2020-09-11 12:05:05,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:05,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:05:05,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:05,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:05,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:05,354 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:05:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:05,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:05,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:05,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478061431] [2020-09-11 12:05:05,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:05,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:05,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:05,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:05,405 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-11 12:05:06,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:06,326 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-09-11 12:05:06,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:05:06,327 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:06,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:06,328 INFO L225 Difference]: With dead ends: 254 [2020-09-11 12:05:06,328 INFO L226 Difference]: Without dead ends: 246 [2020-09-11 12:05:06,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 12:05:06,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-09-11 12:05:06,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-09-11 12:05:06,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-11 12:05:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-09-11 12:05:06,333 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-09-11 12:05:06,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:06,333 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-09-11 12:05:06,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:06,334 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-09-11 12:05:06,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:06,334 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:06,334 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:06,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:06,544 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:06,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:06,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1705051587, now seen corresponding path program 107 times [2020-09-11 12:05:06,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:06,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301805529] [2020-09-11 12:05:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:06,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301805529] [2020-09-11 12:05:06,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017135503] [2020-09-11 12:05:06,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:06,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:05:06,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:06,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:06,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:06,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:05:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:06,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:06,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:06,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911063578] [2020-09-11 12:05:06,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:06,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:06,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:06,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:06,871 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-09-11 12:05:07,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:07,806 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-09-11 12:05:07,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:05:07,807 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:07,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:07,808 INFO L225 Difference]: With dead ends: 246 [2020-09-11 12:05:07,808 INFO L226 Difference]: Without dead ends: 238 [2020-09-11 12:05:07,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 12:05:07,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-09-11 12:05:07,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-09-11 12:05:07,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 12:05:07,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-09-11 12:05:07,812 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-09-11 12:05:07,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:07,812 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-09-11 12:05:07,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:07,813 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-09-11 12:05:07,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:07,813 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:07,813 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:08,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-09-11 12:05:08,023 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:08,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:08,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1704843267, now seen corresponding path program 108 times [2020-09-11 12:05:08,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:08,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272552084] [2020-09-11 12:05:08,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:08,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272552084] [2020-09-11 12:05:08,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164281529] [2020-09-11 12:05:08,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:08,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:05:08,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:08,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:08,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:08,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:08,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:08,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631469170] [2020-09-11 12:05:08,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:08,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:08,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:08,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:08,364 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-09-11 12:05:08,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:08,835 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-09-11 12:05:08,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:05:08,836 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:08,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:08,837 INFO L225 Difference]: With dead ends: 208 [2020-09-11 12:05:08,837 INFO L226 Difference]: Without dead ends: 206 [2020-09-11 12:05:08,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:05:08,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-11 12:05:08,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-09-11 12:05:08,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-11 12:05:08,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-09-11 12:05:08,841 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-09-11 12:05:08,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:08,841 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-09-11 12:05:08,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:08,841 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-09-11 12:05:08,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:08,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:08,842 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:09,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-11 12:05:09,049 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:09,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:09,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1704180177, now seen corresponding path program 109 times [2020-09-11 12:05:09,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:09,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446501887] [2020-09-11 12:05:09,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:09,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446501887] [2020-09-11 12:05:09,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788753367] [2020-09-11 12:05:09,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:09,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:09,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:09,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:09,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:09,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:09,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293089718] [2020-09-11 12:05:09,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:09,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:09,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:09,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:09,367 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-09-11 12:05:10,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:10,007 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-09-11 12:05:10,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:05:10,008 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:10,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:10,009 INFO L225 Difference]: With dead ends: 215 [2020-09-11 12:05:10,009 INFO L226 Difference]: Without dead ends: 213 [2020-09-11 12:05:10,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-09-11 12:05:10,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-11 12:05:10,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-09-11 12:05:10,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-11 12:05:10,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-11 12:05:10,013 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-11 12:05:10,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:10,014 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-11 12:05:10,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:10,014 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-11 12:05:10,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:10,014 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:10,014 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:10,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-09-11 12:05:10,224 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:10,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:10,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1704158818, now seen corresponding path program 110 times [2020-09-11 12:05:10,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:10,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314616067] [2020-09-11 12:05:10,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:10,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314616067] [2020-09-11 12:05:10,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250196362] [2020-09-11 12:05:10,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:10,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:05:10,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:10,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:10,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:10,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:05:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:10,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:10,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:10,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436229578] [2020-09-11 12:05:10,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:10,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:10,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:10,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:10,529 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-11 12:05:11,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:11,233 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-09-11 12:05:11,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:05:11,234 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:11,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:11,235 INFO L225 Difference]: With dead ends: 236 [2020-09-11 12:05:11,236 INFO L226 Difference]: Without dead ends: 228 [2020-09-11 12:05:11,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 12:05:11,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-11 12:05:11,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-09-11 12:05:11,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-11 12:05:11,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-11 12:05:11,239 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-11 12:05:11,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:11,239 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-11 12:05:11,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:11,240 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-11 12:05:11,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:11,240 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:11,240 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:11,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-11 12:05:11,441 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:11,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:11,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1704157857, now seen corresponding path program 111 times [2020-09-11 12:05:11,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:11,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765562944] [2020-09-11 12:05:11,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:11,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765562944] [2020-09-11 12:05:11,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667442202] [2020-09-11 12:05:11,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:11,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:05:11,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:11,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:11,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:11,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:05:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:11,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:11,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:11,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985911383] [2020-09-11 12:05:11,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:11,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:11,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:11,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:11,753 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-11 12:05:12,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:12,519 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-09-11 12:05:12,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:05:12,520 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:12,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:12,521 INFO L225 Difference]: With dead ends: 241 [2020-09-11 12:05:12,521 INFO L226 Difference]: Without dead ends: 233 [2020-09-11 12:05:12,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 12:05:12,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-11 12:05:12,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-09-11 12:05:12,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-09-11 12:05:12,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-09-11 12:05:12,525 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-09-11 12:05:12,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:12,526 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-09-11 12:05:12,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:12,526 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-09-11 12:05:12,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:12,526 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:12,526 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:12,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-11 12:05:12,743 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:12,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:12,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1704129027, now seen corresponding path program 112 times [2020-09-11 12:05:12,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:12,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216654718] [2020-09-11 12:05:12,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:12,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216654718] [2020-09-11 12:05:12,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380575069] [2020-09-11 12:05:12,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:12,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:05:12,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:12,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:12,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:13,042 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:05:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:13,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:13,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:13,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519331578] [2020-09-11 12:05:13,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:13,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:13,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:13,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:13,064 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-09-11 12:05:13,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:13,803 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-09-11 12:05:13,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:05:13,804 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:13,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:13,805 INFO L225 Difference]: With dead ends: 232 [2020-09-11 12:05:13,805 INFO L226 Difference]: Without dead ends: 224 [2020-09-11 12:05:13,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 12:05:13,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-11 12:05:13,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-09-11 12:05:13,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-11 12:05:13,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-09-11 12:05:13,809 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-09-11 12:05:13,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:13,809 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-09-11 12:05:13,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:13,809 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-09-11 12:05:13,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:13,810 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:13,810 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:14,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:14,012 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:14,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:14,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1141268816, now seen corresponding path program 6 times [2020-09-11 12:05:14,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:14,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318037788] [2020-09-11 12:05:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:14,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318037788] [2020-09-11 12:05:14,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73384262] [2020-09-11 12:05:14,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:14,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 12:05:14,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:14,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:14,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:14,412 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:05:14,459 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:14,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:14,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-11 12:05:14,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079481404] [2020-09-11 12:05:14,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:05:14,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:14,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:05:14,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:05:14,461 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-09-11 12:05:14,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:14,788 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-09-11 12:05:14,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:05:14,789 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-09-11 12:05:14,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:14,790 INFO L225 Difference]: With dead ends: 185 [2020-09-11 12:05:14,790 INFO L226 Difference]: Without dead ends: 180 [2020-09-11 12:05:14,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:05:14,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-11 12:05:14,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-09-11 12:05:14,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 12:05:14,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-11 12:05:14,794 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-11 12:05:14,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:14,795 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-11 12:05:14,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:05:14,795 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-11 12:05:14,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:14,795 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:14,796 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:14,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-09-11 12:05:14,996 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:14,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:14,997 INFO L82 PathProgramCache]: Analyzing trace with hash 33766584, now seen corresponding path program 21 times [2020-09-11 12:05:14,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:14,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391185298] [2020-09-11 12:05:14,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:15,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:15,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391185298] [2020-09-11 12:05:15,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897146912] [2020-09-11 12:05:15,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:15,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 12:05:15,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:15,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:15,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:15,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:15,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:15,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043938041] [2020-09-11 12:05:15,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:15,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:15,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:15,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:15,547 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-09-11 12:05:15,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:15,622 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-09-11 12:05:15,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:05:15,624 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 12:05:15,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:15,625 INFO L225 Difference]: With dead ends: 180 [2020-09-11 12:05:15,625 INFO L226 Difference]: Without dead ends: 177 [2020-09-11 12:05:15,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:15,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-11 12:05:15,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-09-11 12:05:15,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-11 12:05:15,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-11 12:05:15,630 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-11 12:05:15,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:15,630 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-11 12:05:15,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:15,631 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-11 12:05:15,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:15,631 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:15,631 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:15,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-11 12:05:15,832 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:15,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:15,832 INFO L82 PathProgramCache]: Analyzing trace with hash -913710200, now seen corresponding path program 22 times [2020-09-11 12:05:15,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:15,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201395751] [2020-09-11 12:05:15,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:16,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201395751] [2020-09-11 12:05:16,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803914537] [2020-09-11 12:05:16,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:16,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:05:16,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:16,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:16,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:16,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:16,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:16,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127093765] [2020-09-11 12:05:16,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:16,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:16,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:16,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:16,293 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-11 12:05:16,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:16,408 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-09-11 12:05:16,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:05:16,409 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 12:05:16,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:16,410 INFO L225 Difference]: With dead ends: 197 [2020-09-11 12:05:16,410 INFO L226 Difference]: Without dead ends: 194 [2020-09-11 12:05:16,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:05:16,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-11 12:05:16,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-09-11 12:05:16,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-11 12:05:16,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-11 12:05:16,414 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-11 12:05:16,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:16,414 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-11 12:05:16,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:16,414 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-11 12:05:16,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:16,415 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:16,415 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:16,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:16,623 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:16,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:16,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1775557960, now seen corresponding path program 23 times [2020-09-11 12:05:16,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:16,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827464457] [2020-09-11 12:05:16,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:16,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:16,810 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:16,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827464457] [2020-09-11 12:05:16,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126831793] [2020-09-11 12:05:16,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:16,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 12:05:16,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:16,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:16,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:17,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:17,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:17,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079556428] [2020-09-11 12:05:17,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:17,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:17,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:17,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:17,064 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-11 12:05:17,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:17,190 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-09-11 12:05:17,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:05:17,191 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 12:05:17,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:17,192 INFO L225 Difference]: With dead ends: 196 [2020-09-11 12:05:17,192 INFO L226 Difference]: Without dead ends: 193 [2020-09-11 12:05:17,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:05:17,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-11 12:05:17,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-09-11 12:05:17,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-09-11 12:05:17,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-09-11 12:05:17,195 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-09-11 12:05:17,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:17,196 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-09-11 12:05:17,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:17,196 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-09-11 12:05:17,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:17,196 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:17,196 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:17,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:17,397 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:17,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:17,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1110622840, now seen corresponding path program 24 times [2020-09-11 12:05:17,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:17,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908493031] [2020-09-11 12:05:17,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:17,565 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:17,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908493031] [2020-09-11 12:05:17,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997023461] [2020-09-11 12:05:17,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:17,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 12:05:17,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:17,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:17,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:17,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:17,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:17,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979743066] [2020-09-11 12:05:17,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:17,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:17,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:17,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:17,827 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-09-11 12:05:18,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:18,006 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-09-11 12:05:18,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:05:18,007 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 12:05:18,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:18,008 INFO L225 Difference]: With dead ends: 195 [2020-09-11 12:05:18,008 INFO L226 Difference]: Without dead ends: 192 [2020-09-11 12:05:18,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:05:18,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-11 12:05:18,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-09-11 12:05:18,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-11 12:05:18,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-09-11 12:05:18,012 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-09-11 12:05:18,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:18,012 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-09-11 12:05:18,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:18,012 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-09-11 12:05:18,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:18,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:18,013 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:18,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:18,214 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:18,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:18,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1089173320, now seen corresponding path program 25 times [2020-09-11 12:05:18,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:18,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174819396] [2020-09-11 12:05:18,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:18,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174819396] [2020-09-11 12:05:18,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281733728] [2020-09-11 12:05:18,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:18,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:18,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:18,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:18,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:18,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:18,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690885020] [2020-09-11 12:05:18,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:18,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:18,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:18,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:18,629 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-09-11 12:05:18,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:18,844 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-09-11 12:05:18,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:05:18,845 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 12:05:18,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:18,846 INFO L225 Difference]: With dead ends: 194 [2020-09-11 12:05:18,846 INFO L226 Difference]: Without dead ends: 191 [2020-09-11 12:05:18,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:05:18,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-11 12:05:18,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-09-11 12:05:18,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-11 12:05:18,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-09-11 12:05:18,850 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-09-11 12:05:18,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:18,850 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-09-11 12:05:18,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:18,851 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-09-11 12:05:18,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:18,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:18,851 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:19,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:19,060 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:19,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:19,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1088481400, now seen corresponding path program 26 times [2020-09-11 12:05:19,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:19,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568553500] [2020-09-11 12:05:19,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:19,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568553500] [2020-09-11 12:05:19,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99883550] [2020-09-11 12:05:19,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:19,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:05:19,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:19,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:19,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:19,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:19,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:19,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624424665] [2020-09-11 12:05:19,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:19,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:19,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:19,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:19,473 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-09-11 12:05:19,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:19,745 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-09-11 12:05:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:05:19,746 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 12:05:19,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:19,747 INFO L225 Difference]: With dead ends: 193 [2020-09-11 12:05:19,747 INFO L226 Difference]: Without dead ends: 190 [2020-09-11 12:05:19,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:05:19,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-11 12:05:19,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-09-11 12:05:19,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-11 12:05:19,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-09-11 12:05:19,751 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-09-11 12:05:19,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:19,751 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-09-11 12:05:19,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:19,751 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-09-11 12:05:19,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:19,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:19,751 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:19,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-09-11 12:05:19,952 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:19,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:19,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1088459080, now seen corresponding path program 27 times [2020-09-11 12:05:19,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:19,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730573351] [2020-09-11 12:05:19,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:20,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730573351] [2020-09-11 12:05:20,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104794371] [2020-09-11 12:05:20,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:20,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 12:05:20,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:20,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:20,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:20,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:05:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:20,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:20,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:20,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197041810] [2020-09-11 12:05:20,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:20,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:20,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:20,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:20,358 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-09-11 12:05:20,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:20,694 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-11 12:05:20,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:05:20,695 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 12:05:20,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:20,696 INFO L225 Difference]: With dead ends: 202 [2020-09-11 12:05:20,697 INFO L226 Difference]: Without dead ends: 196 [2020-09-11 12:05:20,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:05:20,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-11 12:05:20,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-09-11 12:05:20,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-11 12:05:20,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-09-11 12:05:20,700 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-09-11 12:05:20,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:20,700 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-09-11 12:05:20,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:20,701 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-09-11 12:05:20,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:20,701 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:20,701 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:20,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-11 12:05:20,911 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:20,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:20,912 INFO L82 PathProgramCache]: Analyzing trace with hash -195697579, now seen corresponding path program 113 times [2020-09-11 12:05:20,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:20,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989274163] [2020-09-11 12:05:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:21,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989274163] [2020-09-11 12:05:21,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092931515] [2020-09-11 12:05:21,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:21,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:05:21,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:21,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:21,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:21,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:21,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:21,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859622361] [2020-09-11 12:05:21,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:21,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:21,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:21,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:21,341 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-09-11 12:05:21,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:21,409 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-09-11 12:05:21,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:05:21,410 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:21,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:21,411 INFO L225 Difference]: With dead ends: 188 [2020-09-11 12:05:21,411 INFO L226 Difference]: Without dead ends: 186 [2020-09-11 12:05:21,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:21,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-11 12:05:21,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-09-11 12:05:21,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-11 12:05:21,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-09-11 12:05:21,415 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-09-11 12:05:21,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:21,415 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-09-11 12:05:21,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:21,415 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-09-11 12:05:21,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:21,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:21,416 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:21,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-11 12:05:21,624 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:21,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:21,624 INFO L82 PathProgramCache]: Analyzing trace with hash -195696618, now seen corresponding path program 114 times [2020-09-11 12:05:21,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:21,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406291030] [2020-09-11 12:05:21,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:21,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406291030] [2020-09-11 12:05:21,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604568092] [2020-09-11 12:05:21,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:21,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:05:21,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:21,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:21,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:22,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:22,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:22,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874832709] [2020-09-11 12:05:22,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:22,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:22,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:22,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:22,076 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-09-11 12:05:22,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:22,374 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-09-11 12:05:22,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:05:22,375 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:22,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:22,376 INFO L225 Difference]: With dead ends: 199 [2020-09-11 12:05:22,376 INFO L226 Difference]: Without dead ends: 197 [2020-09-11 12:05:22,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:05:22,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-11 12:05:22,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-09-11 12:05:22,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-11 12:05:22,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-11 12:05:22,379 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-11 12:05:22,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:22,380 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-11 12:05:22,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:22,380 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-11 12:05:22,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:22,380 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:22,380 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:22,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-11 12:05:22,581 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:22,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:22,582 INFO L82 PathProgramCache]: Analyzing trace with hash -195667788, now seen corresponding path program 115 times [2020-09-11 12:05:22,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:22,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065186948] [2020-09-11 12:05:22,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:22,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065186948] [2020-09-11 12:05:22,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623704066] [2020-09-11 12:05:22,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:22,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:22,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:23,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:23,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:23,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755692166] [2020-09-11 12:05:23,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:23,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:23,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:23,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:23,079 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-11 12:05:23,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:23,451 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-11 12:05:23,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:05:23,452 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:23,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:23,453 INFO L225 Difference]: With dead ends: 210 [2020-09-11 12:05:23,453 INFO L226 Difference]: Without dead ends: 208 [2020-09-11 12:05:23,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:05:23,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-11 12:05:23,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-09-11 12:05:23,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-11 12:05:23,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-09-11 12:05:23,457 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-09-11 12:05:23,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:23,457 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-09-11 12:05:23,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:23,457 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-09-11 12:05:23,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:23,458 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:23,458 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:23,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-11 12:05:23,659 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:23,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:23,659 INFO L82 PathProgramCache]: Analyzing trace with hash -194774058, now seen corresponding path program 116 times [2020-09-11 12:05:23,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:23,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276949782] [2020-09-11 12:05:23,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:23,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276949782] [2020-09-11 12:05:23,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490985892] [2020-09-11 12:05:23,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:23,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:05:23,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:23,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:23,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:24,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:24,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:24,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383234265] [2020-09-11 12:05:24,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:24,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:24,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:24,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:24,167 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-09-11 12:05:24,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:24,588 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-11 12:05:24,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:05:24,589 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:24,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:24,590 INFO L225 Difference]: With dead ends: 210 [2020-09-11 12:05:24,590 INFO L226 Difference]: Without dead ends: 208 [2020-09-11 12:05:24,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:05:24,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-11 12:05:24,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-09-11 12:05:24,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-11 12:05:24,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-11 12:05:24,593 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-11 12:05:24,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:24,593 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-11 12:05:24,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:24,594 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-11 12:05:24,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:24,594 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:24,594 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:24,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-09-11 12:05:24,798 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:24,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:24,799 INFO L82 PathProgramCache]: Analyzing trace with hash -194773097, now seen corresponding path program 117 times [2020-09-11 12:05:24,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:24,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281197844] [2020-09-11 12:05:24,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:24,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281197844] [2020-09-11 12:05:24,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658747221] [2020-09-11 12:05:24,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:25,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:05:25,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:25,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:25,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:28,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:28,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:28,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145787062] [2020-09-11 12:05:28,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:28,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:28,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:28,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-09-11 12:05:28,009 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-11 12:05:32,257 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-11 12:05:32,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:32,563 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-11 12:05:32,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:05:32,564 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:32,565 INFO L225 Difference]: With dead ends: 218 [2020-09-11 12:05:32,565 INFO L226 Difference]: Without dead ends: 216 [2020-09-11 12:05:32,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-09-11 12:05:32,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-11 12:05:32,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-11 12:05:32,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-11 12:05:32,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-11 12:05:32,569 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-11 12:05:32,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:32,569 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-11 12:05:32,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:32,570 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-11 12:05:32,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:32,570 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:32,570 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:32,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:32,771 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:32,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:32,771 INFO L82 PathProgramCache]: Analyzing trace with hash -194744267, now seen corresponding path program 118 times [2020-09-11 12:05:32,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:32,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995317422] [2020-09-11 12:05:32,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:32,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:32,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995317422] [2020-09-11 12:05:32,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770490695] [2020-09-11 12:05:32,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:32,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:05:32,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:32,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:32,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:33,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:33,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:33,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706382267] [2020-09-11 12:05:33,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:33,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:33,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:33,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:33,272 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-11 12:05:33,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:33,730 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-09-11 12:05:33,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:05:33,731 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:33,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:33,732 INFO L225 Difference]: With dead ends: 212 [2020-09-11 12:05:33,732 INFO L226 Difference]: Without dead ends: 210 [2020-09-11 12:05:33,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:05:33,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-11 12:05:33,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-09-11 12:05:33,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-11 12:05:33,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-09-11 12:05:33,735 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-09-11 12:05:33,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:33,735 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-09-11 12:05:33,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:33,735 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-09-11 12:05:33,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:33,736 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:33,736 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:33,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:33,937 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:33,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:33,937 INFO L82 PathProgramCache]: Analyzing trace with hash -167068428, now seen corresponding path program 119 times [2020-09-11 12:05:33,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:33,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949833892] [2020-09-11 12:05:33,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:34,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949833892] [2020-09-11 12:05:34,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201731696] [2020-09-11 12:05:34,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:34,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:05:34,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:34,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:34,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:34,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:34,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:34,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133592298] [2020-09-11 12:05:34,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:34,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:34,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:34,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:34,362 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-09-11 12:05:34,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:34,804 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-11 12:05:34,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:05:34,805 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:34,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:34,806 INFO L225 Difference]: With dead ends: 212 [2020-09-11 12:05:34,806 INFO L226 Difference]: Without dead ends: 210 [2020-09-11 12:05:34,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-09-11 12:05:34,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-11 12:05:34,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-09-11 12:05:34,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-11 12:05:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-11 12:05:34,810 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-11 12:05:34,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:34,810 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-11 12:05:34,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:34,810 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-11 12:05:34,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:34,810 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:34,810 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:35,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:35,011 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:35,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:35,012 INFO L82 PathProgramCache]: Analyzing trace with hash -167067467, now seen corresponding path program 120 times [2020-09-11 12:05:35,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:35,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433908403] [2020-09-11 12:05:35,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:35,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:35,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433908403] [2020-09-11 12:05:35,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434329827] [2020-09-11 12:05:35,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:35,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:05:35,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:35,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:35,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:35,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:35,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:35,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:35,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487470771] [2020-09-11 12:05:35,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:35,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:35,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:35,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:35,450 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-11 12:05:35,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:35,913 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-09-11 12:05:35,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:05:35,914 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:35,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:35,915 INFO L225 Difference]: With dead ends: 224 [2020-09-11 12:05:35,915 INFO L226 Difference]: Without dead ends: 222 [2020-09-11 12:05:35,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-09-11 12:05:35,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-11 12:05:35,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-09-11 12:05:35,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-11 12:05:35,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-11 12:05:35,919 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-11 12:05:35,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:35,919 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-11 12:05:35,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:35,920 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-11 12:05:35,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:35,920 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:35,920 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:36,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:36,122 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:36,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:36,123 INFO L82 PathProgramCache]: Analyzing trace with hash -167038637, now seen corresponding path program 121 times [2020-09-11 12:05:36,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:36,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342466564] [2020-09-11 12:05:36,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:36,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342466564] [2020-09-11 12:05:36,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026827924] [2020-09-11 12:05:36,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:36,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:36,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:36,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:36,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:36,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122783202] [2020-09-11 12:05:36,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:36,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:36,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:36,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:36,560 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-11 12:05:36,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:36,986 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-09-11 12:05:36,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:05:36,987 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:36,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:36,988 INFO L225 Difference]: With dead ends: 218 [2020-09-11 12:05:36,988 INFO L226 Difference]: Without dead ends: 216 [2020-09-11 12:05:36,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:05:36,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-11 12:05:36,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-11 12:05:36,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-11 12:05:36,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-11 12:05:36,992 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-11 12:05:36,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:36,992 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-11 12:05:36,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:36,992 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-11 12:05:36,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:36,992 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:36,992 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:37,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:37,193 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:37,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:37,194 INFO L82 PathProgramCache]: Analyzing trace with hash -166114155, now seen corresponding path program 122 times [2020-09-11 12:05:37,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:37,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993833017] [2020-09-11 12:05:37,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:37,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993833017] [2020-09-11 12:05:37,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015464267] [2020-09-11 12:05:37,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:37,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:05:37,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:37,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:37,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:37,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:37,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:37,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096499009] [2020-09-11 12:05:37,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:37,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:37,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:37,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:37,634 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-11 12:05:38,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:38,006 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-09-11 12:05:38,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:05:38,007 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:38,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:38,008 INFO L225 Difference]: With dead ends: 206 [2020-09-11 12:05:38,008 INFO L226 Difference]: Without dead ends: 204 [2020-09-11 12:05:38,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:05:38,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-11 12:05:38,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-09-11 12:05:38,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-11 12:05:38,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-09-11 12:05:38,012 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-09-11 12:05:38,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:38,012 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-09-11 12:05:38,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:38,012 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-09-11 12:05:38,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:38,012 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:38,013 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:38,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-11 12:05:38,214 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:38,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:38,214 INFO L82 PathProgramCache]: Analyzing trace with hash 691806102, now seen corresponding path program 123 times [2020-09-11 12:05:38,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:38,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029872166] [2020-09-11 12:05:38,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:38,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:38,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029872166] [2020-09-11 12:05:38,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854247271] [2020-09-11 12:05:38,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:38,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 12:05:38,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:38,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:38,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:38,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:38,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:38,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198374842] [2020-09-11 12:05:38,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:38,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:38,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:38,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:38,684 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-09-11 12:05:39,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:39,052 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-09-11 12:05:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:05:39,053 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:39,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:39,055 INFO L225 Difference]: With dead ends: 207 [2020-09-11 12:05:39,055 INFO L226 Difference]: Without dead ends: 205 [2020-09-11 12:05:39,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:05:39,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-09-11 12:05:39,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-09-11 12:05:39,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-11 12:05:39,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-09-11 12:05:39,059 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-09-11 12:05:39,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:39,059 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-09-11 12:05:39,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:39,060 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-09-11 12:05:39,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:39,060 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:39,060 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:39,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-11 12:05:39,271 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:39,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:39,272 INFO L82 PathProgramCache]: Analyzing trace with hash 691807063, now seen corresponding path program 124 times [2020-09-11 12:05:39,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:39,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780242915] [2020-09-11 12:05:39,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:39,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:39,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780242915] [2020-09-11 12:05:39,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868883902] [2020-09-11 12:05:39,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:39,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:05:39,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:39,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:39,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:39,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:39,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:39,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305477784] [2020-09-11 12:05:39,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:39,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:39,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:39,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:39,729 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-09-11 12:05:40,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:40,107 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-09-11 12:05:40,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:05:40,108 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:40,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:40,109 INFO L225 Difference]: With dead ends: 217 [2020-09-11 12:05:40,109 INFO L226 Difference]: Without dead ends: 215 [2020-09-11 12:05:40,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:05:40,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-11 12:05:40,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-09-11 12:05:40,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-11 12:05:40,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-09-11 12:05:40,112 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-09-11 12:05:40,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:40,113 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-09-11 12:05:40,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:40,113 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-09-11 12:05:40,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:40,113 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:40,113 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:40,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-11 12:05:40,314 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:40,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:40,315 INFO L82 PathProgramCache]: Analyzing trace with hash 691835893, now seen corresponding path program 125 times [2020-09-11 12:05:40,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:40,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721711270] [2020-09-11 12:05:40,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:40,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:40,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721711270] [2020-09-11 12:05:40,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351451293] [2020-09-11 12:05:40,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:40,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:05:40,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:40,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:40,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:40,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:40,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:40,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337461422] [2020-09-11 12:05:40,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:40,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:40,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:40,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:40,866 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-09-11 12:05:41,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:41,384 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-09-11 12:05:41,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:05:41,385 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:41,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:41,386 INFO L225 Difference]: With dead ends: 223 [2020-09-11 12:05:41,386 INFO L226 Difference]: Without dead ends: 221 [2020-09-11 12:05:41,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:05:41,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-11 12:05:41,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-09-11 12:05:41,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-11 12:05:41,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-09-11 12:05:41,390 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-09-11 12:05:41,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:41,391 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-09-11 12:05:41,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:41,391 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-09-11 12:05:41,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:41,391 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:41,391 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:41,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-11 12:05:41,597 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:41,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:41,597 INFO L82 PathProgramCache]: Analyzing trace with hash 692730584, now seen corresponding path program 126 times [2020-09-11 12:05:41,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:41,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419780075] [2020-09-11 12:05:41,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:41,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419780075] [2020-09-11 12:05:41,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526004725] [2020-09-11 12:05:41,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:41,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:05:41,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:41,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:41,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:42,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:42,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:42,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092481528] [2020-09-11 12:05:42,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:42,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:42,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:42,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:42,043 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-09-11 12:05:42,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:42,454 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-09-11 12:05:42,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:05:42,455 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:42,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:42,455 INFO L225 Difference]: With dead ends: 225 [2020-09-11 12:05:42,456 INFO L226 Difference]: Without dead ends: 223 [2020-09-11 12:05:42,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:05:42,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-11 12:05:42,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-09-11 12:05:42,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-11 12:05:42,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-09-11 12:05:42,459 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-09-11 12:05:42,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:42,459 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-09-11 12:05:42,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:42,459 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-09-11 12:05:42,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:42,460 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:42,460 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:42,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:42,661 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:42,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:42,661 INFO L82 PathProgramCache]: Analyzing trace with hash 720435253, now seen corresponding path program 127 times [2020-09-11 12:05:42,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:42,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035855974] [2020-09-11 12:05:42,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:42,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035855974] [2020-09-11 12:05:42,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043746993] [2020-09-11 12:05:42,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:42,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:42,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:43,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:43,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:43,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352795551] [2020-09-11 12:05:43,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:43,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:43,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:43,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:43,144 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-09-11 12:05:43,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:43,562 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-09-11 12:05:43,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:05:43,563 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:43,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:43,564 INFO L225 Difference]: With dead ends: 214 [2020-09-11 12:05:43,564 INFO L226 Difference]: Without dead ends: 212 [2020-09-11 12:05:43,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:05:43,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-11 12:05:43,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-09-11 12:05:43,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-11 12:05:43,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-09-11 12:05:43,567 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-09-11 12:05:43,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:43,568 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-09-11 12:05:43,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:43,568 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-09-11 12:05:43,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:43,568 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:43,568 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:43,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:43,769 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:43,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:43,770 INFO L82 PathProgramCache]: Analyzing trace with hash 721388565, now seen corresponding path program 128 times [2020-09-11 12:05:43,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:43,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600701884] [2020-09-11 12:05:43,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:44,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600701884] [2020-09-11 12:05:44,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386771117] [2020-09-11 12:05:44,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:44,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:05:44,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:44,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:44,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:44,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:44,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:44,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:44,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068723432] [2020-09-11 12:05:44,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:44,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:44,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:44,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:44,287 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-09-11 12:05:44,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:44,573 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-09-11 12:05:44,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:05:44,574 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:44,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:44,575 INFO L225 Difference]: With dead ends: 203 [2020-09-11 12:05:44,575 INFO L226 Difference]: Without dead ends: 201 [2020-09-11 12:05:44,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:05:44,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-11 12:05:44,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-09-11 12:05:44,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-11 12:05:44,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-09-11 12:05:44,578 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-09-11 12:05:44,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:44,578 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-09-11 12:05:44,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:44,579 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-09-11 12:05:44,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:44,579 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:44,579 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:44,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-09-11 12:05:44,780 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:44,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:44,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1998481017, now seen corresponding path program 129 times [2020-09-11 12:05:44,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:44,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868601815] [2020-09-11 12:05:44,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:45,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868601815] [2020-09-11 12:05:45,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404376016] [2020-09-11 12:05:45,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:45,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:05:45,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:45,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:45,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:45,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:45,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:45,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008737155] [2020-09-11 12:05:45,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:45,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:45,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:45,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:45,304 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-09-11 12:05:45,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:45,409 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-11 12:05:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:05:45,410 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:45,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:45,411 INFO L225 Difference]: With dead ends: 212 [2020-09-11 12:05:45,411 INFO L226 Difference]: Without dead ends: 210 [2020-09-11 12:05:45,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:05:45,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-11 12:05:45,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-09-11 12:05:45,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-11 12:05:45,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-09-11 12:05:45,415 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-09-11 12:05:45,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:45,415 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-09-11 12:05:45,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:45,415 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-09-11 12:05:45,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:45,415 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:45,416 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:45,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:45,616 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:45,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:45,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1998480056, now seen corresponding path program 130 times [2020-09-11 12:05:45,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:45,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996100027] [2020-09-11 12:05:45,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:45,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996100027] [2020-09-11 12:05:45,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467161207] [2020-09-11 12:05:45,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:45,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:05:45,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:45,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:45,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:46,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:46,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:46,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037826406] [2020-09-11 12:05:46,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:46,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:46,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:46,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:46,134 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-09-11 12:05:46,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:46,469 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-09-11 12:05:46,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:05:46,471 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:46,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:46,471 INFO L225 Difference]: With dead ends: 217 [2020-09-11 12:05:46,471 INFO L226 Difference]: Without dead ends: 215 [2020-09-11 12:05:46,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:05:46,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-11 12:05:46,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-09-11 12:05:46,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-11 12:05:46,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-11 12:05:46,475 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-11 12:05:46,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:46,475 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-11 12:05:46,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:46,475 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-11 12:05:46,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:46,476 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:46,476 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:46,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:46,677 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:46,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:46,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1998451226, now seen corresponding path program 131 times [2020-09-11 12:05:46,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:46,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770688289] [2020-09-11 12:05:46,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:46,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770688289] [2020-09-11 12:05:46,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276582976] [2020-09-11 12:05:46,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:46,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:05:46,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:46,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:46,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:47,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:47,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:47,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384379330] [2020-09-11 12:05:47,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:47,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:47,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:47,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:47,396 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-11 12:05:47,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:47,834 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-09-11 12:05:47,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:05:47,835 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:47,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:47,836 INFO L225 Difference]: With dead ends: 227 [2020-09-11 12:05:47,836 INFO L226 Difference]: Without dead ends: 225 [2020-09-11 12:05:47,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:05:47,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-11 12:05:47,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-09-11 12:05:47,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-11 12:05:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-09-11 12:05:47,840 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-09-11 12:05:47,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:47,840 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-09-11 12:05:47,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:47,841 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-09-11 12:05:47,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:47,841 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:47,841 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:48,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:48,042 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:48,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:48,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1997557496, now seen corresponding path program 132 times [2020-09-11 12:05:48,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:48,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580255965] [2020-09-11 12:05:48,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:48,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:48,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580255965] [2020-09-11 12:05:48,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071386833] [2020-09-11 12:05:48,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:48,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:05:48,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:48,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:48,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:48,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:48,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:48,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139578024] [2020-09-11 12:05:48,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:48,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:48,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:48,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:48,551 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-09-11 12:05:49,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:49,074 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-09-11 12:05:49,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:05:49,075 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:49,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:49,076 INFO L225 Difference]: With dead ends: 227 [2020-09-11 12:05:49,076 INFO L226 Difference]: Without dead ends: 225 [2020-09-11 12:05:49,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-09-11 12:05:49,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-11 12:05:49,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-09-11 12:05:49,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-11 12:05:49,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-11 12:05:49,080 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-11 12:05:49,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:49,080 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-11 12:05:49,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:49,080 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-11 12:05:49,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:49,080 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:49,081 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:49,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-09-11 12:05:49,284 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:49,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:49,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1997556535, now seen corresponding path program 133 times [2020-09-11 12:05:49,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:49,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096649659] [2020-09-11 12:05:49,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:49,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096649659] [2020-09-11 12:05:49,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828665625] [2020-09-11 12:05:49,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:49,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:49,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:53,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:53,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:53,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591688339] [2020-09-11 12:05:53,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:53,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:53,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:53,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-09-11 12:05:53,315 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-11 12:05:57,619 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-11 12:05:58,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:58,060 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-09-11 12:05:58,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:05:58,061 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:58,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:58,062 INFO L225 Difference]: With dead ends: 237 [2020-09-11 12:05:58,062 INFO L226 Difference]: Without dead ends: 235 [2020-09-11 12:05:58,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-09-11 12:05:58,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-09-11 12:05:58,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-09-11 12:05:58,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-11 12:05:58,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-11 12:05:58,066 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-11 12:05:58,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:58,066 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-11 12:05:58,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:58,066 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-11 12:05:58,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:58,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:58,067 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:58,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-11 12:05:58,268 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:58,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:58,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1997527705, now seen corresponding path program 134 times [2020-09-11 12:05:58,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:58,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925489491] [2020-09-11 12:05:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:58,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925489491] [2020-09-11 12:05:58,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238238516] [2020-09-11 12:05:58,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:58,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:05:58,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:58,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:58,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:58,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:58,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:58,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465046209] [2020-09-11 12:05:58,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:58,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:58,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:58,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:58,898 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-11 12:05:59,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:59,471 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-09-11 12:05:59,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:05:59,472 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:59,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:59,473 INFO L225 Difference]: With dead ends: 229 [2020-09-11 12:05:59,473 INFO L226 Difference]: Without dead ends: 227 [2020-09-11 12:05:59,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-09-11 12:05:59,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-11 12:05:59,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-09-11 12:05:59,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-11 12:05:59,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-09-11 12:05:59,477 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-09-11 12:05:59,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:59,477 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-09-11 12:05:59,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:59,477 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-09-11 12:05:59,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:59,477 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:59,477 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:59,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-09-11 12:05:59,678 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:59,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:59,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1969851866, now seen corresponding path program 135 times [2020-09-11 12:05:59,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:59,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765583297] [2020-09-11 12:05:59,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:59,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765583297] [2020-09-11 12:05:59,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036476483] [2020-09-11 12:05:59,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:59,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:05:59,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:59,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:59,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:00,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:00,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:00,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450519027] [2020-09-11 12:06:00,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:00,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:00,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:00,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:00,119 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-09-11 12:06:00,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:00,745 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-09-11 12:06:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:06:00,746 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:00,746 INFO L225 Difference]: With dead ends: 225 [2020-09-11 12:06:00,747 INFO L226 Difference]: Without dead ends: 223 [2020-09-11 12:06:00,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-09-11 12:06:00,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-11 12:06:00,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-09-11 12:06:00,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-11 12:06:00,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-11 12:06:00,751 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-11 12:06:00,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:00,751 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-11 12:06:00,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:00,751 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-11 12:06:00,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:00,752 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:00,752 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:00,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-11 12:06:00,963 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:00,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:00,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1969850905, now seen corresponding path program 136 times [2020-09-11 12:06:00,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:00,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565005279] [2020-09-11 12:06:00,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:01,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565005279] [2020-09-11 12:06:01,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134937994] [2020-09-11 12:06:01,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:01,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:01,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:01,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:01,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:01,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:01,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:01,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:01,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467191920] [2020-09-11 12:06:01,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:01,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:01,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:01,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:01,451 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-11 12:06:02,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:02,060 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2020-09-11 12:06:02,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:06:02,061 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:02,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:02,062 INFO L225 Difference]: With dead ends: 239 [2020-09-11 12:06:02,062 INFO L226 Difference]: Without dead ends: 237 [2020-09-11 12:06:02,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-09-11 12:06:02,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-11 12:06:02,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-09-11 12:06:02,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-11 12:06:02,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-11 12:06:02,067 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-11 12:06:02,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:02,067 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-11 12:06:02,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:02,067 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-11 12:06:02,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:02,068 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:02,068 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:02,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-11 12:06:02,269 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:02,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:02,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1969822075, now seen corresponding path program 137 times [2020-09-11 12:06:02,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:02,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309523863] [2020-09-11 12:06:02,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:02,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:02,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309523863] [2020-09-11 12:06:02,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644006657] [2020-09-11 12:06:02,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:02,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:06:02,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:02,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:02,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:02,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:02,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:02,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:02,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843800979] [2020-09-11 12:06:02,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:02,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:02,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:02,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:02,722 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-11 12:06:03,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:03,235 INFO L93 Difference]: Finished difference Result 234 states and 550 transitions. [2020-09-11 12:06:03,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:06:03,237 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:03,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:03,237 INFO L225 Difference]: With dead ends: 234 [2020-09-11 12:06:03,237 INFO L226 Difference]: Without dead ends: 232 [2020-09-11 12:06:03,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:06:03,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-11 12:06:03,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-09-11 12:06:03,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-11 12:06:03,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-11 12:06:03,241 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-11 12:06:03,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:03,241 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-11 12:06:03,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:03,242 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-11 12:06:03,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:03,242 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:03,242 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:03,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-09-11 12:06:03,451 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:03,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:03,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1968897593, now seen corresponding path program 138 times [2020-09-11 12:06:03,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:03,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312506911] [2020-09-11 12:06:03,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:03,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:03,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312506911] [2020-09-11 12:06:03,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370445672] [2020-09-11 12:06:03,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:03,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:06:03,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:03,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:03,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:03,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:03,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:03,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995301897] [2020-09-11 12:06:03,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:03,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:03,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:03,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:03,888 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-11 12:06:04,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:04,317 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-09-11 12:06:04,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:06:04,318 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:04,319 INFO L225 Difference]: With dead ends: 218 [2020-09-11 12:06:04,319 INFO L226 Difference]: Without dead ends: 216 [2020-09-11 12:06:04,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:06:04,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-11 12:06:04,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-09-11 12:06:04,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-11 12:06:04,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-09-11 12:06:04,323 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-09-11 12:06:04,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:04,323 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-09-11 12:06:04,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:04,323 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-09-11 12:06:04,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:04,324 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:04,324 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:04,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:04,525 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:04,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:04,525 INFO L82 PathProgramCache]: Analyzing trace with hash 575763989, now seen corresponding path program 139 times [2020-09-11 12:06:04,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:04,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401868631] [2020-09-11 12:06:04,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:04,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401868631] [2020-09-11 12:06:04,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854068411] [2020-09-11 12:06:04,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:04,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:04,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:05,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:05,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:05,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:05,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663486607] [2020-09-11 12:06:05,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:05,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:05,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:05,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:05,037 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-09-11 12:06:05,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:05,199 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-09-11 12:06:05,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:05,200 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:05,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:05,201 INFO L225 Difference]: With dead ends: 208 [2020-09-11 12:06:05,201 INFO L226 Difference]: Without dead ends: 206 [2020-09-11 12:06:05,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:06:05,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-11 12:06:05,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-09-11 12:06:05,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-11 12:06:05,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-09-11 12:06:05,205 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-09-11 12:06:05,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:05,205 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-09-11 12:06:05,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:05,205 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-09-11 12:06:05,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:05,206 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:05,206 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:05,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:05,407 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:05,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:05,407 INFO L82 PathProgramCache]: Analyzing trace with hash 575764950, now seen corresponding path program 140 times [2020-09-11 12:06:05,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:05,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665472604] [2020-09-11 12:06:05,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:05,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:05,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665472604] [2020-09-11 12:06:05,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983311868] [2020-09-11 12:06:05,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:05,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:05,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:05,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:05,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:05,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:05,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:05,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196343285] [2020-09-11 12:06:05,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:05,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:05,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:05,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:05,874 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-09-11 12:06:06,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:06,260 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-09-11 12:06:06,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:06:06,261 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:06,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:06,262 INFO L225 Difference]: With dead ends: 229 [2020-09-11 12:06:06,262 INFO L226 Difference]: Without dead ends: 227 [2020-09-11 12:06:06,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:06:06,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-11 12:06:06,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-09-11 12:06:06,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-11 12:06:06,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-09-11 12:06:06,266 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-09-11 12:06:06,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:06,266 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-09-11 12:06:06,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:06,266 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-09-11 12:06:06,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:06,266 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:06,267 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:06,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:06,467 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:06,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:06,468 INFO L82 PathProgramCache]: Analyzing trace with hash 575793780, now seen corresponding path program 141 times [2020-09-11 12:06:06,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:06,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664126169] [2020-09-11 12:06:06,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:06,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:06,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664126169] [2020-09-11 12:06:06,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089419781] [2020-09-11 12:06:06,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:06,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:06:06,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:06,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:06,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:07,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:07,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:07,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:07,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690666019] [2020-09-11 12:06:07,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:07,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:07,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:07,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:07,674 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-09-11 12:06:08,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:08,156 INFO L93 Difference]: Finished difference Result 235 states and 548 transitions. [2020-09-11 12:06:08,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:06:08,157 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:08,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:08,158 INFO L225 Difference]: With dead ends: 235 [2020-09-11 12:06:08,158 INFO L226 Difference]: Without dead ends: 233 [2020-09-11 12:06:08,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:06:08,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-11 12:06:08,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2020-09-11 12:06:08,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-11 12:06:08,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-09-11 12:06:08,161 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-09-11 12:06:08,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:08,161 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-09-11 12:06:08,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:08,161 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-09-11 12:06:08,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:08,162 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:08,162 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:08,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:08,363 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:08,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:08,363 INFO L82 PathProgramCache]: Analyzing trace with hash 576687510, now seen corresponding path program 142 times [2020-09-11 12:06:08,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:08,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642364629] [2020-09-11 12:06:08,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:08,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642364629] [2020-09-11 12:06:08,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336872345] [2020-09-11 12:06:08,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:08,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:08,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:08,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:08,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:08,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:08,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:08,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:08,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931763324] [2020-09-11 12:06:08,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:08,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:08,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:08,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:08,852 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-09-11 12:06:09,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:09,455 INFO L93 Difference]: Finished difference Result 233 states and 544 transitions. [2020-09-11 12:06:09,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:06:09,457 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:09,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:09,457 INFO L225 Difference]: With dead ends: 233 [2020-09-11 12:06:09,458 INFO L226 Difference]: Without dead ends: 231 [2020-09-11 12:06:09,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:06:09,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-11 12:06:09,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-09-11 12:06:09,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-11 12:06:09,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-09-11 12:06:09,462 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-09-11 12:06:09,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:09,462 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-09-11 12:06:09,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:09,463 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-09-11 12:06:09,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:09,463 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:09,463 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:09,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:09,672 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:09,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:09,672 INFO L82 PathProgramCache]: Analyzing trace with hash 576688471, now seen corresponding path program 143 times [2020-09-11 12:06:09,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:09,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696670919] [2020-09-11 12:06:09,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:09,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696670919] [2020-09-11 12:06:09,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396707979] [2020-09-11 12:06:09,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:09,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:09,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:09,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:09,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:14,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:14,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:14,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141556167] [2020-09-11 12:06:14,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:14,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:14,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:14,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-09-11 12:06:14,492 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-09-11 12:06:18,810 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-11 12:06:19,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:19,190 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-09-11 12:06:19,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:06:19,191 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:19,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:19,192 INFO L225 Difference]: With dead ends: 241 [2020-09-11 12:06:19,192 INFO L226 Difference]: Without dead ends: 239 [2020-09-11 12:06:19,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-09-11 12:06:19,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-11 12:06:19,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-09-11 12:06:19,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-11 12:06:19,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-09-11 12:06:19,196 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-09-11 12:06:19,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:19,196 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-09-11 12:06:19,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:19,196 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-09-11 12:06:19,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:19,197 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:19,197 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:19,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:19,405 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:19,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:19,405 INFO L82 PathProgramCache]: Analyzing trace with hash 576717301, now seen corresponding path program 144 times [2020-09-11 12:06:19,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:19,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164740936] [2020-09-11 12:06:19,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:19,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164740936] [2020-09-11 12:06:19,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226072318] [2020-09-11 12:06:19,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:19,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:06:19,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:19,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:19,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:19,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:19,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:19,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4616867] [2020-09-11 12:06:19,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:19,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:19,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:19,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:19,873 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-09-11 12:06:20,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:20,445 INFO L93 Difference]: Finished difference Result 233 states and 548 transitions. [2020-09-11 12:06:20,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:06:20,446 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:20,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:20,447 INFO L225 Difference]: With dead ends: 233 [2020-09-11 12:06:20,447 INFO L226 Difference]: Without dead ends: 231 [2020-09-11 12:06:20,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:06:20,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-11 12:06:20,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2020-09-11 12:06:20,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-11 12:06:20,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-09-11 12:06:20,451 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-09-11 12:06:20,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:20,451 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-09-11 12:06:20,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:20,451 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-09-11 12:06:20,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:20,451 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:20,452 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:20,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-09-11 12:06:20,652 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:20,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:20,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1212993479, now seen corresponding path program 145 times [2020-09-11 12:06:20,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:20,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876357085] [2020-09-11 12:06:20,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:20,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876357085] [2020-09-11 12:06:20,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663996596] [2020-09-11 12:06:20,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:20,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:20,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:21,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:21,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:21,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:21,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535326441] [2020-09-11 12:06:21,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:21,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:21,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:21,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:21,129 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-09-11 12:06:21,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:21,333 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-09-11 12:06:21,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:06:21,334 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:21,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:21,335 INFO L225 Difference]: With dead ends: 204 [2020-09-11 12:06:21,335 INFO L226 Difference]: Without dead ends: 202 [2020-09-11 12:06:21,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:06:21,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-11 12:06:21,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-09-11 12:06:21,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-11 12:06:21,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-09-11 12:06:21,339 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-09-11 12:06:21,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:21,339 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-09-11 12:06:21,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:21,339 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-09-11 12:06:21,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:21,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:21,339 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:21,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:21,540 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:21,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:21,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1212994440, now seen corresponding path program 146 times [2020-09-11 12:06:21,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:21,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484021440] [2020-09-11 12:06:21,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:21,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484021440] [2020-09-11 12:06:21,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760686168] [2020-09-11 12:06:21,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:21,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:21,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:21,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:21,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:22,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:22,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:22,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957127547] [2020-09-11 12:06:22,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:22,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:22,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:22,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:22,004 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-09-11 12:06:22,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:22,425 INFO L93 Difference]: Finished difference Result 225 states and 527 transitions. [2020-09-11 12:06:22,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:06:22,426 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:22,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:22,427 INFO L225 Difference]: With dead ends: 225 [2020-09-11 12:06:22,427 INFO L226 Difference]: Without dead ends: 223 [2020-09-11 12:06:22,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:06:22,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-11 12:06:22,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-09-11 12:06:22,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-11 12:06:22,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-09-11 12:06:22,431 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-09-11 12:06:22,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:22,431 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-09-11 12:06:22,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:22,431 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-09-11 12:06:22,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:22,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:22,431 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:22,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-11 12:06:22,632 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:22,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:22,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1213023270, now seen corresponding path program 147 times [2020-09-11 12:06:22,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:22,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118106518] [2020-09-11 12:06:22,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:22,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118106518] [2020-09-11 12:06:22,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527748015] [2020-09-11 12:06:22,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:22,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:06:22,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:22,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:22,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:23,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:23,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:23,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939720671] [2020-09-11 12:06:23,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:23,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:23,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:23,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:23,109 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-09-11 12:06:23,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:23,638 INFO L93 Difference]: Finished difference Result 231 states and 539 transitions. [2020-09-11 12:06:23,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:06:23,639 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:23,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:23,640 INFO L225 Difference]: With dead ends: 231 [2020-09-11 12:06:23,640 INFO L226 Difference]: Without dead ends: 229 [2020-09-11 12:06:23,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-09-11 12:06:23,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-09-11 12:06:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 161. [2020-09-11 12:06:23,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-11 12:06:23,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-09-11 12:06:23,644 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-09-11 12:06:23,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:23,644 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-09-11 12:06:23,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:23,644 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-09-11 12:06:23,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:23,644 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:23,644 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:23,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:23,845 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:23,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:23,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1233549269, now seen corresponding path program 148 times [2020-09-11 12:06:23,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:23,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053579744] [2020-09-11 12:06:23,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2020-09-11 12:06:23,969 WARN L210 SmtUtils]: Removed 5 from assertion stack [2020-09-11 12:06:23,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2020-09-11 12:06:23,970 WARN L544 AbstractCegarLoop]: Verification canceled [2020-09-11 12:06:23,973 WARN L228 ceAbstractionStarter]: Timeout [2020-09-11 12:06:23,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 12:06:23 BasicIcfg [2020-09-11 12:06:23,974 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-11 12:06:23,975 INFO L168 Benchmark]: Toolchain (without parser) took 266116.24 ms. Allocated memory was 138.4 MB in the beginning and 248.0 MB in the end (delta: 109.6 MB). Free memory was 98.6 MB in the beginning and 165.3 MB in the end (delta: -66.7 MB). Peak memory consumption was 42.9 MB. Max. memory is 7.1 GB. [2020-09-11 12:06:23,975 INFO L168 Benchmark]: CDTParser took 0.54 ms. Allocated memory is still 138.4 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-11 12:06:23,976 INFO L168 Benchmark]: CACSL2BoogieTranslator took 720.84 ms. Allocated memory was 138.4 MB in the beginning and 198.7 MB in the end (delta: 60.3 MB). Free memory was 98.0 MB in the beginning and 157.6 MB in the end (delta: -59.6 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. [2020-09-11 12:06:23,976 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.40 ms. Allocated memory is still 198.7 MB. Free memory was 157.6 MB in the beginning and 155.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-11 12:06:23,976 INFO L168 Benchmark]: Boogie Preprocessor took 35.22 ms. Allocated memory is still 198.7 MB. Free memory was 155.6 MB in the beginning and 154.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-11 12:06:23,976 INFO L168 Benchmark]: RCFGBuilder took 529.02 ms. Allocated memory is still 198.7 MB. Free memory was 153.5 MB in the beginning and 133.4 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-09-11 12:06:23,977 INFO L168 Benchmark]: TraceAbstraction took 264764.30 ms. Allocated memory was 198.7 MB in the beginning and 248.0 MB in the end (delta: 49.3 MB). Free memory was 132.7 MB in the beginning and 165.3 MB in the end (delta: -32.6 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2020-09-11 12:06:23,978 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.54 ms. Allocated memory is still 138.4 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 720.84 ms. Allocated memory was 138.4 MB in the beginning and 198.7 MB in the end (delta: 60.3 MB). Free memory was 98.0 MB in the beginning and 157.6 MB in the end (delta: -59.6 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 58.40 ms. Allocated memory is still 198.7 MB. Free memory was 157.6 MB in the beginning and 155.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.22 ms. Allocated memory is still 198.7 MB. Free memory was 155.6 MB in the beginning and 154.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 529.02 ms. Allocated memory is still 198.7 MB. Free memory was 153.5 MB in the beginning and 133.4 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 264764.30 ms. Allocated memory was 198.7 MB in the beginning and 248.0 MB in the end (delta: 49.3 MB). Free memory was 132.7 MB in the beginning and 165.3 MB in the end (delta: -32.6 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.5s, 59 ProgramPointsBefore, 20 ProgramPointsAfterwards, 57 TransitionsBefore, 15 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 3 ChoiceCompositions, 576 VarBasedMoverChecksPositive, 14 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 988 CheckedPairsTotal, 47 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while BasicCegarLoop was analyzing trace of length 15 with TraceHistMax 5,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 17 for 26ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 264.6s, OverallIterations: 182, TraceHistogramMax: 6, AutomataDifference: 151.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 2353 SDtfs, 16338 SDslu, 15989 SDs, 0 SdLazy, 11307 SolverSat, 4043 SolverUnsat, 25 SolverUnknown, 0 SolverNotchecked, 60.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4482 GetRequests, 852 SyntacticMatches, 156 SemanticMatches, 3474 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17685 ImplicationChecksByTransitivity, 140.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=163, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 181 MinimizatonAttempts, 8320 StatesRemovedByMinimization, 181 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.2s SsaConstructionTime, 3.6s SatisfiabilityAnalysisTime, 62.6s InterpolantComputationTime, 4418 NumberOfCodeBlocks, 4418 NumberOfCodeBlocksAsserted, 550 NumberOfCheckSat, 4064 ConstructedInterpolants, 9 QuantifiedInterpolants, 423460 SizeOfPredicates, 173 NumberOfNonLiveVariables, 14992 ConjunctsInSsa, 1687 ConjunctsInUnsatCore, 354 InterpolantComputations, 8 PerfectInterpolantSequences, 0/1716 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