/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/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-507b705 [2020-09-11 16:16:05,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-11 16:16:05,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-11 16:16:05,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-11 16:16:05,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-11 16:16:05,468 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-11 16:16:05,470 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-11 16:16:05,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-11 16:16:05,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-11 16:16:05,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-11 16:16:05,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-11 16:16:05,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-11 16:16:05,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-11 16:16:05,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-11 16:16:05,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-11 16:16:05,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-11 16:16:05,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-11 16:16:05,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-11 16:16:05,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-11 16:16:05,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-11 16:16:05,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-11 16:16:05,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-11 16:16:05,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-11 16:16:05,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-11 16:16:05,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-11 16:16:05,498 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-11 16:16:05,499 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-11 16:16:05,500 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-11 16:16:05,501 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-11 16:16:05,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-11 16:16:05,502 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-11 16:16:05,503 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-11 16:16:05,503 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-11 16:16:05,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-11 16:16:05,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-11 16:16:05,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-11 16:16:05,506 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-09-11 16:16:05,532 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-11 16:16:05,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-11 16:16:05,534 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-11 16:16:05,534 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-11 16:16:05,534 INFO L138 SettingsManager]: * Use SBE=true [2020-09-11 16:16:05,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-11 16:16:05,535 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-11 16:16:05,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-11 16:16:05,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-11 16:16:05,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-11 16:16:05,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-11 16:16:05,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-11 16:16:05,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-11 16:16:05,536 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-11 16:16:05,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-11 16:16:05,536 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-11 16:16:05,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-11 16:16:05,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-11 16:16:05,537 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-11 16:16:05,537 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-11 16:16:05,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-11 16:16:05,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 16:16:05,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-11 16:16:05,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-11 16:16:05,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-11 16:16:05,538 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-11 16:16:05,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-11 16:16:05,539 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-11 16:16:05,539 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-11 16:16:05,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-11 16:16:06,001 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-11 16:16:06,007 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-11 16:16:06,009 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-11 16:16:06,010 INFO L275 PluginConnector]: CDTParser initialized [2020-09-11 16:16:06,011 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-09-11 16:16:06,101 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ec9f77f9/8f08b96911b7423ebb6d54bb37fb63d3/FLAG714e477de [2020-09-11 16:16:06,760 INFO L306 CDTParser]: Found 1 translation units. [2020-09-11 16:16:06,761 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-09-11 16:16:06,775 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ec9f77f9/8f08b96911b7423ebb6d54bb37fb63d3/FLAG714e477de [2020-09-11 16:16:06,960 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ec9f77f9/8f08b96911b7423ebb6d54bb37fb63d3 [2020-09-11 16:16:06,975 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-11 16:16:06,982 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-11 16:16:06,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-11 16:16:06,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-11 16:16:06,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-11 16:16:06,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 04:16:06" (1/1) ... [2020-09-11 16:16:06,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a0dffbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:06, skipping insertion in model container [2020-09-11 16:16:06,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 04:16:06" (1/1) ... [2020-09-11 16:16:07,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-11 16:16:07,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-11 16:16:07,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 16:16:07,635 INFO L203 MainTranslator]: Completed pre-run [2020-09-11 16:16:07,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 16:16:07,772 INFO L208 MainTranslator]: Completed translation [2020-09-11 16:16:07,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:07 WrapperNode [2020-09-11 16:16:07,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-11 16:16:07,774 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-11 16:16:07,774 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-11 16:16:07,774 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-11 16:16:07,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:07" (1/1) ... [2020-09-11 16:16:07,803 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:07" (1/1) ... [2020-09-11 16:16:07,830 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-11 16:16:07,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-11 16:16:07,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-11 16:16:07,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-11 16:16:07,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:07" (1/1) ... [2020-09-11 16:16:07,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:07" (1/1) ... [2020-09-11 16:16:07,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:07" (1/1) ... [2020-09-11 16:16:07,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:07" (1/1) ... [2020-09-11 16:16:07,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:07" (1/1) ... [2020-09-11 16:16:07,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:07" (1/1) ... [2020-09-11 16:16:07,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:07" (1/1) ... [2020-09-11 16:16:07,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-11 16:16:07,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-11 16:16:07,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-11 16:16:07,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-11 16:16:07,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:07" (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 16:16:07,954 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-11 16:16:07,954 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-11 16:16:07,954 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-11 16:16:07,954 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-11 16:16:07,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-11 16:16:07,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-11 16:16:07,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-11 16:16:07,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-11 16:16:07,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-11 16:16:07,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-11 16:16:07,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-11 16:16:07,958 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 16:16:08,339 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-11 16:16:08,341 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-11 16:16:08,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 04:16:08 BoogieIcfgContainer [2020-09-11 16:16:08,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-11 16:16:08,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-11 16:16:08,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-11 16:16:08,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-11 16:16:08,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 04:16:06" (1/3) ... [2020-09-11 16:16:08,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59f96f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 04:16:08, skipping insertion in model container [2020-09-11 16:16:08,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:16:07" (2/3) ... [2020-09-11 16:16:08,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59f96f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 04:16:08, skipping insertion in model container [2020-09-11 16:16:08,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 04:16:08" (3/3) ... [2020-09-11 16:16:08,355 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-09-11 16:16:08,367 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-11 16:16:08,367 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-11 16:16:08,378 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-11 16:16:08,379 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-11 16:16:08,403 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,403 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,404 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,404 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,404 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,404 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,405 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,405 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,405 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,405 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,406 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,406 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,406 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,407 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,407 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,407 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,407 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,407 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,408 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,408 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,408 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,409 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,409 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,409 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,409 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,410 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,410 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,410 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,414 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,415 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,415 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,415 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,415 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,416 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,426 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,426 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,427 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,427 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,428 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,428 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:16:08,457 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-11 16:16:08,483 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-11 16:16:08,483 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-11 16:16:08,483 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-11 16:16:08,483 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-11 16:16:08,484 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-11 16:16:08,484 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-11 16:16:08,484 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-11 16:16:08,484 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-11 16:16:08,501 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-11 16:16:08,503 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-11 16:16:08,546 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-11 16:16:08,547 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 16:16:08,553 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-11 16:16:08,556 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-11 16:16:08,574 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-11 16:16:08,574 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 16:16:08,575 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-11 16:16:08,577 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-11 16:16:08,578 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-11 16:16:09,579 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-11 16:16:09,808 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-11 16:16:09,808 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-11 16:16:09,813 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-11 16:16:09,828 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-11 16:16:09,831 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-11 16:16:09,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-11 16:16:09,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:09,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-11 16:16:09,844 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:09,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:09,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-11 16:16:09,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:09,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987144249] [2020-09-11 16:16:09,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:10,122 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 16:16:10,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987144249] [2020-09-11 16:16:10,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:16:10,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-11 16:16:10,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130560212] [2020-09-11 16:16:10,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 16:16:10,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:10,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 16:16:10,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 16:16:10,173 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-11 16:16:10,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:10,258 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-11 16:16:10,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 16:16:10,260 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-11 16:16:10,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:10,276 INFO L225 Difference]: With dead ends: 75 [2020-09-11 16:16:10,276 INFO L226 Difference]: Without dead ends: 42 [2020-09-11 16:16:10,278 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 16:16:10,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-11 16:16:10,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-11 16:16:10,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 16:16:10,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-11 16:16:10,328 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-11 16:16:10,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:10,329 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-11 16:16:10,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 16:16:10,329 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-11 16:16:10,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 16:16:10,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:10,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:10,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-11 16:16:10,331 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:10,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:10,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-11 16:16:10,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:10,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007593864] [2020-09-11 16:16:10,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:10,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:10,453 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 16:16:10,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007593864] [2020-09-11 16:16:10,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:16:10,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 16:16:10,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891481061] [2020-09-11 16:16:10,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 16:16:10,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:10,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 16:16:10,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 16:16:10,459 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-11 16:16:10,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:10,511 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-11 16:16:10,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-11 16:16:10,513 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 16:16:10,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:10,514 INFO L225 Difference]: With dead ends: 56 [2020-09-11 16:16:10,515 INFO L226 Difference]: Without dead ends: 50 [2020-09-11 16:16:10,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:16:10,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-11 16:16:10,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-11 16:16:10,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 16:16:10,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-11 16:16:10,531 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-11 16:16:10,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:10,536 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-11 16:16:10,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 16:16:10,537 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-11 16:16:10,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:16:10,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:10,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:10,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-11 16:16:10,538 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:10,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:10,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-11 16:16:10,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:10,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141978497] [2020-09-11 16:16:10,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:10,632 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 16:16:10,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141978497] [2020-09-11 16:16:10,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:16:10,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 16:16:10,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014750078] [2020-09-11 16:16:10,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 16:16:10,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:10,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 16:16:10,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:16:10,635 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-09-11 16:16:10,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:10,717 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-11 16:16:10,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 16:16:10,717 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 16:16:10,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:10,719 INFO L225 Difference]: With dead ends: 78 [2020-09-11 16:16:10,719 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 16:16:10,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:10,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 16:16:10,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-09-11 16:16:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 16:16:10,728 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-09-11 16:16:10,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:10,729 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 16:16:10,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 16:16:10,729 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 16:16:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:16:10,730 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:10,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:10,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-11 16:16:10,731 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:10,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:10,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-09-11 16:16:10,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:10,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310687324] [2020-09-11 16:16:10,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:10,818 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 16:16:10,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310687324] [2020-09-11 16:16:10,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:16:10,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 16:16:10,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165226207] [2020-09-11 16:16:10,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 16:16:10,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:10,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 16:16:10,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:16:10,821 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-09-11 16:16:10,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:10,909 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-11 16:16:10,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 16:16:10,910 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 16:16:10,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:10,911 INFO L225 Difference]: With dead ends: 54 [2020-09-11 16:16:10,911 INFO L226 Difference]: Without dead ends: 43 [2020-09-11 16:16:10,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:10,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-11 16:16:10,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-11 16:16:10,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-11 16:16:10,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-09-11 16:16:10,917 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-09-11 16:16:10,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:10,917 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-09-11 16:16:10,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 16:16:10,917 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-09-11 16:16:10,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 16:16:10,918 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:10,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:10,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-11 16:16:10,919 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:10,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:10,919 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-09-11 16:16:10,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:10,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846609652] [2020-09-11 16:16:10,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:10,992 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 16:16:10,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846609652] [2020-09-11 16:16:10,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:16:10,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 16:16:10,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749472048] [2020-09-11 16:16:10,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 16:16:10,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:10,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 16:16:10,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:16:10,995 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-09-11 16:16:11,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:11,072 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-09-11 16:16:11,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 16:16:11,073 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 16:16:11,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:11,074 INFO L225 Difference]: With dead ends: 57 [2020-09-11 16:16:11,074 INFO L226 Difference]: Without dead ends: 51 [2020-09-11 16:16:11,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:11,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-11 16:16:11,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-09-11 16:16:11,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-11 16:16:11,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-11 16:16:11,081 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-09-11 16:16:11,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:11,081 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-11 16:16:11,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 16:16:11,081 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-11 16:16:11,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:16:11,082 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:11,082 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:11,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-11 16:16:11,083 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:11,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:11,083 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-09-11 16:16:11,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:11,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695365209] [2020-09-11 16:16:11,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:11,166 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 16:16:11,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695365209] [2020-09-11 16:16:11,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615195776] [2020-09-11 16:16:11,167 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 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 16:16:11,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:11,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:11,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:16:11,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:11,285 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:11,299 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 16:16:11,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:11,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 16:16:11,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170267106] [2020-09-11 16:16:11,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 16:16:11,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:11,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 16:16:11,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-11 16:16:11,302 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-09-11 16:16:11,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:11,411 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-09-11 16:16:11,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 16:16:11,412 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 16:16:11,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:11,413 INFO L225 Difference]: With dead ends: 48 [2020-09-11 16:16:11,413 INFO L226 Difference]: Without dead ends: 43 [2020-09-11 16:16:11,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:11,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-11 16:16:11,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-11 16:16:11,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-11 16:16:11,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-11 16:16:11,418 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-09-11 16:16:11,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:11,419 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-11 16:16:11,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 16:16:11,419 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-11 16:16:11,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:16:11,420 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:11,420 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:11,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-11 16:16:11,633 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:11,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:11,633 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-09-11 16:16:11,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:11,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141278111] [2020-09-11 16:16:11,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:11,770 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 16:16:11,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141278111] [2020-09-11 16:16:11,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579768378] [2020-09-11 16:16:11,771 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 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 16:16:11,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:11,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:11,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:16:11,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:11,841 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 16:16:11,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:11,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-11 16:16:11,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332216914] [2020-09-11 16:16:11,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 16:16:11,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:11,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 16:16:11,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-11 16:16:11,843 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-09-11 16:16:11,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:11,911 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-11 16:16:11,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 16:16:11,912 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-11 16:16:11,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:11,913 INFO L225 Difference]: With dead ends: 54 [2020-09-11 16:16:11,913 INFO L226 Difference]: Without dead ends: 48 [2020-09-11 16:16:11,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-11 16:16:11,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-11 16:16:11,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 16:16:11,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-11 16:16:11,918 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-09-11 16:16:11,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:11,919 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-11 16:16:11,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 16:16:11,919 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-11 16:16:11,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:16:11,920 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:11,920 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:12,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:12,132 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:12,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:12,132 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-09-11 16:16:12,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:12,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121489302] [2020-09-11 16:16:12,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:12,232 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 16:16:12,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121489302] [2020-09-11 16:16:12,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226242513] [2020-09-11 16:16:12,233 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 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 16:16:12,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:16:12,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:12,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:16:12,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:12,322 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:12,340 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 16:16:12,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:12,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 16:16:12,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192193530] [2020-09-11 16:16:12,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 16:16:12,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:12,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 16:16:12,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-11 16:16:12,343 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-09-11 16:16:12,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:12,451 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-09-11 16:16:12,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:16:12,451 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 16:16:12,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:12,452 INFO L225 Difference]: With dead ends: 58 [2020-09-11 16:16:12,452 INFO L226 Difference]: Without dead ends: 52 [2020-09-11 16:16:12,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:12,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-11 16:16:12,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-11 16:16:12,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-11 16:16:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-11 16:16:12,458 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-09-11 16:16:12,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:12,458 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-11 16:16:12,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 16:16:12,458 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-11 16:16:12,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:16:12,459 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:12,459 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:12,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:12,672 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:12,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:12,672 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-09-11 16:16:12,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:12,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253301932] [2020-09-11 16:16:12,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:12,746 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 16:16:12,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253301932] [2020-09-11 16:16:12,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139162615] [2020-09-11 16:16:12,747 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 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 16:16:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:12,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:16:12,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:12,811 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 16:16:12,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:12,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-11 16:16:12,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688435338] [2020-09-11 16:16:12,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 16:16:12,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:12,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 16:16:12,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-11 16:16:12,813 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-09-11 16:16:12,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:12,959 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-11 16:16:12,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:12,960 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-11 16:16:12,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:12,960 INFO L225 Difference]: With dead ends: 78 [2020-09-11 16:16:12,961 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 16:16:12,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:12,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 16:16:12,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-09-11 16:16:12,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:12,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-09-11 16:16:12,967 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-09-11 16:16:12,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:12,967 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-09-11 16:16:12,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 16:16:12,968 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-09-11 16:16:12,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:16:12,968 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:12,968 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:13,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:13,181 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:13,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:13,181 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-09-11 16:16:13,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:13,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921075271] [2020-09-11 16:16:13,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:13,257 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 16:16:13,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921075271] [2020-09-11 16:16:13,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084228446] [2020-09-11 16:16:13,258 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 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 16:16:13,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:13,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:13,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:16:13,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:13,367 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:13,379 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 16:16:13,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:13,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 16:16:13,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612400412] [2020-09-11 16:16:13,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 16:16:13,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:13,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 16:16:13,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-11 16:16:13,382 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-09-11 16:16:13,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:13,566 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-09-11 16:16:13,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:16:13,567 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 16:16:13,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:13,568 INFO L225 Difference]: With dead ends: 62 [2020-09-11 16:16:13,568 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 16:16:13,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:13,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 16:16:13,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-09-11 16:16:13,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-11 16:16:13,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-09-11 16:16:13,576 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-09-11 16:16:13,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:13,576 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-09-11 16:16:13,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 16:16:13,577 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-09-11 16:16:13,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:16:13,581 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:13,581 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:13,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-11 16:16:13,783 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:13,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:13,784 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-09-11 16:16:13,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:13,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981972570] [2020-09-11 16:16:13,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:13,888 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 16:16:13,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981972570] [2020-09-11 16:16:13,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528703410] [2020-09-11 16:16:13,889 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 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 16:16:13,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 16:16:13,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:13,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:16:13,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:13,972 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 16:16:13,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:13,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-11 16:16:13,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541571487] [2020-09-11 16:16:13,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 16:16:13,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:13,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 16:16:13,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-11 16:16:13,974 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-09-11 16:16:14,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:14,104 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-09-11 16:16:14,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:16:14,105 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-11 16:16:14,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:14,106 INFO L225 Difference]: With dead ends: 64 [2020-09-11 16:16:14,107 INFO L226 Difference]: Without dead ends: 58 [2020-09-11 16:16:14,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:14,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-11 16:16:14,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-11 16:16:14,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-11 16:16:14,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-09-11 16:16:14,113 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-09-11 16:16:14,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:14,113 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-09-11 16:16:14,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 16:16:14,113 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-09-11 16:16:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:16:14,114 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:14,114 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:14,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:14,325 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:14,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:14,326 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-09-11 16:16:14,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:14,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523691263] [2020-09-11 16:16:14,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:14,412 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 16:16:14,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523691263] [2020-09-11 16:16:14,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251615710] [2020-09-11 16:16:14,413 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 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 16:16:14,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:14,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:14,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:16:14,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:14,518 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:14,536 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 16:16:14,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:14,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 16:16:14,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751488003] [2020-09-11 16:16:14,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:14,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:14,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:14,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:14,540 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-09-11 16:16:14,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:14,700 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-09-11 16:16:14,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:16:14,701 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 16:16:14,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:14,702 INFO L225 Difference]: With dead ends: 61 [2020-09-11 16:16:14,702 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 16:16:14,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:16:14,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 16:16:14,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-09-11 16:16:14,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-11 16:16:14,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-11 16:16:14,707 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-09-11 16:16:14,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:14,708 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-11 16:16:14,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:14,708 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-11 16:16:14,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:16:14,709 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:14,709 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:14,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:14,921 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:14,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:14,922 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-09-11 16:16:14,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:14,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371943798] [2020-09-11 16:16:14,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:14,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:15,043 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 16:16:15,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371943798] [2020-09-11 16:16:15,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289543242] [2020-09-11 16:16:15,044 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 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 16:16:15,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:15,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:15,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:16:15,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:15,116 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 16:16:15,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:15,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-11 16:16:15,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938342749] [2020-09-11 16:16:15,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 16:16:15,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:15,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 16:16:15,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-11 16:16:15,119 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-09-11 16:16:15,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:15,297 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-11 16:16:15,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:15,298 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-11 16:16:15,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:15,299 INFO L225 Difference]: With dead ends: 77 [2020-09-11 16:16:15,299 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 16:16:15,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:15,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 16:16:15,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-09-11 16:16:15,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-11 16:16:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-09-11 16:16:15,304 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-09-11 16:16:15,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:15,305 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-09-11 16:16:15,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 16:16:15,305 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-09-11 16:16:15,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:16:15,306 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:15,306 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:15,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-11 16:16:15,519 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:15,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:15,520 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-09-11 16:16:15,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:15,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664403891] [2020-09-11 16:16:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:15,588 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 16:16:15,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664403891] [2020-09-11 16:16:15,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121731585] [2020-09-11 16:16:15,589 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 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 16:16:15,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 16:16:15,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:15,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:15,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:15,684 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 16:16:15,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:15,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 16:16:15,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914925676] [2020-09-11 16:16:15,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:15,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:15,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:15,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:15,686 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-09-11 16:16:15,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:15,897 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-09-11 16:16:15,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:16:15,898 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 16:16:15,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:15,899 INFO L225 Difference]: With dead ends: 56 [2020-09-11 16:16:15,899 INFO L226 Difference]: Without dead ends: 48 [2020-09-11 16:16:15,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:16:15,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-11 16:16:15,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-09-11 16:16:15,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-11 16:16:15,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-09-11 16:16:15,903 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-09-11 16:16:15,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:15,903 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-09-11 16:16:15,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:15,903 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-09-11 16:16:15,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 16:16:15,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:15,904 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:16,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:16,114 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:16,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:16,114 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-09-11 16:16:16,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:16,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552303689] [2020-09-11 16:16:16,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:16,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552303689] [2020-09-11 16:16:16,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055934703] [2020-09-11 16:16:16,234 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 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 16:16:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:16,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:16:16,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:16,349 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:16,364 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 16:16:16,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:16,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 16:16:16,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327338529] [2020-09-11 16:16:16,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:16,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:16,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:16,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:16,368 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-09-11 16:16:16,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:16,565 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-09-11 16:16:16,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:16,566 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 16:16:16,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:16,567 INFO L225 Difference]: With dead ends: 60 [2020-09-11 16:16:16,567 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 16:16:16,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:16:16,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 16:16:16,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-09-11 16:16:16,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:16,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 16:16:16,575 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-09-11 16:16:16,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:16,576 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 16:16:16,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:16,576 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 16:16:16,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:16,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:16,577 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:16,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-11 16:16:16,789 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:16,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:16,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-09-11 16:16:16,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:16,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353739579] [2020-09-11 16:16:16,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:16,870 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 16:16:16,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353739579] [2020-09-11 16:16:16,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020104037] [2020-09-11 16:16:16,871 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 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 16:16:16,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:16,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:16,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:16,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:16,957 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:16,971 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 16:16:16,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:16,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 16:16:16,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148675558] [2020-09-11 16:16:16,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:16,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:16,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:16,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:16,975 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-09-11 16:16:17,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:17,237 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-09-11 16:16:17,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:17,238 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 16:16:17,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:17,239 INFO L225 Difference]: With dead ends: 54 [2020-09-11 16:16:17,239 INFO L226 Difference]: Without dead ends: 49 [2020-09-11 16:16:17,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:16:17,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-11 16:16:17,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-11 16:16:17,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-11 16:16:17,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-11 16:16:17,245 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-09-11 16:16:17,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:17,245 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-11 16:16:17,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:17,245 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-11 16:16:17,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:17,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:17,246 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:17,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-11 16:16:17,450 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:17,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:17,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-09-11 16:16:17,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:17,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021304734] [2020-09-11 16:16:17,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:17,580 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 16:16:17,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021304734] [2020-09-11 16:16:17,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759021485] [2020-09-11 16:16:17,581 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 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 16:16:17,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:16:17,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:17,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:17,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:17,652 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 16:16:17,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:17,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 16:16:17,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769472674] [2020-09-11 16:16:17,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:17,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:17,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:17,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:17,654 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-09-11 16:16:17,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:17,793 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-09-11 16:16:17,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:16:17,794 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 16:16:17,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:17,795 INFO L225 Difference]: With dead ends: 60 [2020-09-11 16:16:17,795 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 16:16:17,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:17,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 16:16:17,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-11 16:16:17,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:17,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-11 16:16:17,799 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-09-11 16:16:17,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:17,800 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-11 16:16:17,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:17,800 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-11 16:16:17,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:17,801 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:17,801 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:18,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-11 16:16:18,006 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:18,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:18,007 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-09-11 16:16:18,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:18,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330544445] [2020-09-11 16:16:18,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:18,097 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 16:16:18,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330544445] [2020-09-11 16:16:18,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482353669] [2020-09-11 16:16:18,098 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 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 16:16:18,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:18,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:18,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:18,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:18,187 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:18,204 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 16:16:18,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:18,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 16:16:18,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286299162] [2020-09-11 16:16:18,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:18,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:18,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:18,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:18,206 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-09-11 16:16:18,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:18,359 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-09-11 16:16:18,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:16:18,360 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 16:16:18,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:18,361 INFO L225 Difference]: With dead ends: 66 [2020-09-11 16:16:18,361 INFO L226 Difference]: Without dead ends: 60 [2020-09-11 16:16:18,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:16:18,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-11 16:16:18,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-09-11 16:16:18,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-11 16:16:18,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-11 16:16:18,365 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-09-11 16:16:18,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:18,365 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-11 16:16:18,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:18,366 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-11 16:16:18,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:18,366 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:18,366 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:18,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-11 16:16:18,577 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:18,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:18,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-09-11 16:16:18,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:18,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567008064] [2020-09-11 16:16:18,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:18,670 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 16:16:18,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567008064] [2020-09-11 16:16:18,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406934903] [2020-09-11 16:16:18,671 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 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 16:16:18,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:16:18,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:18,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:18,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:18,742 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 16:16:18,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:18,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 16:16:18,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841773448] [2020-09-11 16:16:18,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:18,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:18,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:18,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:18,749 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-09-11 16:16:18,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:18,937 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-09-11 16:16:18,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:16:18,937 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 16:16:18,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:18,938 INFO L225 Difference]: With dead ends: 67 [2020-09-11 16:16:18,939 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 16:16:18,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:16:18,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 16:16:18,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-09-11 16:16:18,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-11 16:16:18,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-09-11 16:16:18,943 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-09-11 16:16:18,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:18,944 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-09-11 16:16:18,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:18,944 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-09-11 16:16:18,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:18,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:18,945 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:19,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:19,157 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:19,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:19,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-09-11 16:16:19,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:19,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777604756] [2020-09-11 16:16:19,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:19,275 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 16:16:19,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777604756] [2020-09-11 16:16:19,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983134365] [2020-09-11 16:16:19,276 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 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 16:16:19,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:16:19,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:19,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:19,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:19,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:19,354 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 16:16:19,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:19,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 16:16:19,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941644581] [2020-09-11 16:16:19,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:19,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:19,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:19,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:19,356 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-09-11 16:16:19,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:19,611 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-09-11 16:16:19,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:16:19,613 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 16:16:19,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:19,614 INFO L225 Difference]: With dead ends: 69 [2020-09-11 16:16:19,614 INFO L226 Difference]: Without dead ends: 63 [2020-09-11 16:16:19,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:16:19,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-11 16:16:19,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-11 16:16:19,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:19,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 16:16:19,620 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-09-11 16:16:19,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:19,620 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 16:16:19,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:19,621 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 16:16:19,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:19,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:19,621 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:19,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:19,822 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:19,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:19,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-09-11 16:16:19,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:19,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498454794] [2020-09-11 16:16:19,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:19,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498454794] [2020-09-11 16:16:19,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456908107] [2020-09-11 16:16:19,899 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 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 16:16:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:19,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:19,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:19,977 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 16:16:19,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:19,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 16:16:19,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015628035] [2020-09-11 16:16:19,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:16:19,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:19,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:16:19,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:16:19,979 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-09-11 16:16:20,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:20,210 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-11 16:16:20,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:20,217 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 16:16:20,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:20,218 INFO L225 Difference]: With dead ends: 88 [2020-09-11 16:16:20,218 INFO L226 Difference]: Without dead ends: 82 [2020-09-11 16:16:20,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:16:20,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-11 16:16:20,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-09-11 16:16:20,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 16:16:20,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-09-11 16:16:20,224 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-09-11 16:16:20,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:20,224 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-09-11 16:16:20,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:16:20,225 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-09-11 16:16:20,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 16:16:20,225 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:20,225 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:20,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:20,436 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:20,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:20,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-09-11 16:16:20,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:20,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374900908] [2020-09-11 16:16:20,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:20,527 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 16:16:20,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374900908] [2020-09-11 16:16:20,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628435569] [2020-09-11 16:16:20,528 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 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 16:16:20,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:20,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:20,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:16:20,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:20,608 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:20,617 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 16:16:20,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:20,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 16:16:20,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312871218] [2020-09-11 16:16:20,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:20,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:20,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:20,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:20,619 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-09-11 16:16:20,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:20,926 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-11 16:16:20,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:20,927 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 16:16:20,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:20,927 INFO L225 Difference]: With dead ends: 69 [2020-09-11 16:16:20,928 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 16:16:20,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:16:20,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 16:16:20,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-11 16:16:20,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-11 16:16:20,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-09-11 16:16:20,932 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-09-11 16:16:20,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:20,932 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-09-11 16:16:20,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:20,932 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-09-11 16:16:20,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:20,933 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:20,933 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:21,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-11 16:16:21,142 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:21,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:21,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-09-11 16:16:21,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:21,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899181967] [2020-09-11 16:16:21,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:21,274 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 16:16:21,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899181967] [2020-09-11 16:16:21,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100919336] [2020-09-11 16:16:21,274 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 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 16:16:21,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:16:21,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:21,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:21,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:21,349 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 16:16:21,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:21,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 16:16:21,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456396957] [2020-09-11 16:16:21,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:21,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:21,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:21,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:21,351 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-09-11 16:16:21,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:21,526 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-11 16:16:21,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:21,527 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 16:16:21,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:21,528 INFO L225 Difference]: With dead ends: 74 [2020-09-11 16:16:21,528 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 16:16:21,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:16:21,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 16:16:21,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-09-11 16:16:21,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 16:16:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 16:16:21,532 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-11 16:16:21,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:21,532 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 16:16:21,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 16:16:21,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:21,533 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:21,533 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:21,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-11 16:16:21,743 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:21,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:21,744 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-09-11 16:16:21,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:21,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183924960] [2020-09-11 16:16:21,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:21,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:21,858 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 16:16:21,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183924960] [2020-09-11 16:16:21,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554193662] [2020-09-11 16:16:21,859 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 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 16:16:21,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:21,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:21,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:21,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:21,956 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:21,972 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 16:16:21,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:21,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 16:16:21,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349504049] [2020-09-11 16:16:21,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:21,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:21,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:21,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:21,976 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-11 16:16:22,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:22,181 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-09-11 16:16:22,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:16:22,182 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 16:16:22,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:22,183 INFO L225 Difference]: With dead ends: 71 [2020-09-11 16:16:22,183 INFO L226 Difference]: Without dead ends: 65 [2020-09-11 16:16:22,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:16:22,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-11 16:16:22,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-09-11 16:16:22,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 16:16:22,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 16:16:22,186 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-11 16:16:22,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:22,186 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 16:16:22,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:22,186 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 16:16:22,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:22,187 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:22,187 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:22,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-11 16:16:22,398 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:22,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:22,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-09-11 16:16:22,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:22,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029963712] [2020-09-11 16:16:22,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:22,490 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 16:16:22,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029963712] [2020-09-11 16:16:22,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361564203] [2020-09-11 16:16:22,491 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 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 16:16:22,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 16:16:22,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:22,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:22,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:22,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:22,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:22,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 16:16:22,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204399675] [2020-09-11 16:16:22,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:22,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:22,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:22,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:22,578 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-11 16:16:22,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:22,824 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-09-11 16:16:22,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:16:22,825 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 16:16:22,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:22,826 INFO L225 Difference]: With dead ends: 68 [2020-09-11 16:16:22,826 INFO L226 Difference]: Without dead ends: 62 [2020-09-11 16:16:22,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:16:22,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-11 16:16:22,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-11 16:16:22,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 16:16:22,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 16:16:22,829 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-11 16:16:22,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:22,830 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 16:16:22,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:22,830 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 16:16:22,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:22,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:22,831 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:23,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-11 16:16:23,040 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:23,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:23,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-09-11 16:16:23,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:23,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244589660] [2020-09-11 16:16:23,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:23,152 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 16:16:23,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244589660] [2020-09-11 16:16:23,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485234720] [2020-09-11 16:16:23,153 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 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 16:16:23,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 16:16:23,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:23,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:23,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:23,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:23,271 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 16:16:23,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:23,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 16:16:23,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567863150] [2020-09-11 16:16:23,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:23,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:23,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:23,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:23,273 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-11 16:16:23,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:23,627 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-09-11 16:16:23,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:23,628 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 16:16:23,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:23,629 INFO L225 Difference]: With dead ends: 67 [2020-09-11 16:16:23,629 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 16:16:23,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:16:23,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 16:16:23,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-11 16:16:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 16:16:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 16:16:23,632 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-11 16:16:23,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:23,633 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 16:16:23,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:23,633 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 16:16:23,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:23,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:23,634 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:23,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-11 16:16:23,836 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:23,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:23,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-09-11 16:16:23,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:23,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658086275] [2020-09-11 16:16:23,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:23,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:23,924 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 16:16:23,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658086275] [2020-09-11 16:16:23,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433663478] [2020-09-11 16:16:23,924 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 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 16:16:23,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:23,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:23,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:23,999 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 16:16:23,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:24,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 16:16:24,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222411419] [2020-09-11 16:16:24,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:16:24,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:24,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:16:24,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:16:24,002 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-11 16:16:24,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:24,236 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-11 16:16:24,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:24,237 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 16:16:24,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:24,238 INFO L225 Difference]: With dead ends: 83 [2020-09-11 16:16:24,238 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 16:16:24,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:16:24,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 16:16:24,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-11 16:16:24,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 16:16:24,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-09-11 16:16:24,245 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-09-11 16:16:24,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:24,245 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-09-11 16:16:24,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:16:24,245 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-09-11 16:16:24,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:24,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:24,246 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:24,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:24,447 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:24,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:24,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-09-11 16:16:24,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:24,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210354489] [2020-09-11 16:16:24,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:24,539 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 16:16:24,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210354489] [2020-09-11 16:16:24,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066296910] [2020-09-11 16:16:24,540 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 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 16:16:24,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:24,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:24,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:24,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:24,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:24,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 16:16:24,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566599569] [2020-09-11 16:16:24,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:24,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:24,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:24,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:24,630 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-09-11 16:16:24,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:24,961 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-09-11 16:16:24,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:24,961 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 16:16:24,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:24,962 INFO L225 Difference]: With dead ends: 62 [2020-09-11 16:16:24,962 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 16:16:24,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:16:24,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 16:16:24,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-09-11 16:16:24,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-11 16:16:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-09-11 16:16:24,966 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-09-11 16:16:24,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:24,966 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-09-11 16:16:24,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:24,966 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-09-11 16:16:24,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:16:24,967 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:24,967 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:25,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-11 16:16:25,168 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:25,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:25,168 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-09-11 16:16:25,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:25,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975117885] [2020-09-11 16:16:25,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:25,254 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 16:16:25,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975117885] [2020-09-11 16:16:25,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808649312] [2020-09-11 16:16:25,255 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 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 16:16:25,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:16:25,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:25,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:16:25,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:25,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:25,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:25,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 16:16:25,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303059404] [2020-09-11 16:16:25,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:25,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:25,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:25,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:25,364 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-09-11 16:16:25,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:25,712 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-09-11 16:16:25,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:25,713 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 16:16:25,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:25,714 INFO L225 Difference]: With dead ends: 68 [2020-09-11 16:16:25,714 INFO L226 Difference]: Without dead ends: 63 [2020-09-11 16:16:25,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:16:25,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-11 16:16:25,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-09-11 16:16:25,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 16:16:25,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-11 16:16:25,717 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-09-11 16:16:25,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:25,717 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-11 16:16:25,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:25,717 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-11 16:16:25,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:25,718 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:25,718 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:25,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-11 16:16:25,926 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:25,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:25,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-09-11 16:16:25,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:25,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963723653] [2020-09-11 16:16:25,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:26,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:26,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963723653] [2020-09-11 16:16:26,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259054736] [2020-09-11 16:16:26,018 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 16:16:26,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:26,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:26,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:26,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:26,092 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:26,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:26,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:26,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 16:16:26,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518243707] [2020-09-11 16:16:26,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:26,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:26,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:26,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:26,106 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-09-11 16:16:26,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:26,469 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-09-11 16:16:26,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:26,470 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 16:16:26,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:26,471 INFO L225 Difference]: With dead ends: 60 [2020-09-11 16:16:26,471 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 16:16:26,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:16:26,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 16:16:26,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-11 16:16:26,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 16:16:26,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-11 16:16:26,475 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-09-11 16:16:26,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:26,475 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-11 16:16:26,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:26,476 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-11 16:16:26,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:26,476 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:26,476 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:26,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:26,685 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:26,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:26,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-09-11 16:16:26,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:26,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664767658] [2020-09-11 16:16:26,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:26,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664767658] [2020-09-11 16:16:26,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775311846] [2020-09-11 16:16:26,820 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 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 16:16:26,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 16:16:26,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:26,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:26,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:26,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:26,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:26,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 16:16:26,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892360183] [2020-09-11 16:16:26,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:26,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:26,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:26,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:26,896 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-09-11 16:16:27,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:27,042 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-09-11 16:16:27,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:16:27,042 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 16:16:27,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:27,043 INFO L225 Difference]: With dead ends: 66 [2020-09-11 16:16:27,043 INFO L226 Difference]: Without dead ends: 60 [2020-09-11 16:16:27,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:16:27,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-11 16:16:27,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-11 16:16:27,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 16:16:27,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-11 16:16:27,046 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-09-11 16:16:27,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:27,047 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-11 16:16:27,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:27,047 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-11 16:16:27,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:27,047 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:27,048 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:27,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:27,248 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:27,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:27,249 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-09-11 16:16:27,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:27,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680219385] [2020-09-11 16:16:27,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:27,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680219385] [2020-09-11 16:16:27,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641293205] [2020-09-11 16:16:27,376 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 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 16:16:27,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 16:16:27,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:27,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:27,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:27,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:27,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:27,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 16:16:27,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734237776] [2020-09-11 16:16:27,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:27,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:27,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:27,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:27,488 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-09-11 16:16:27,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:27,723 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-09-11 16:16:27,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:16:27,723 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 16:16:27,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:27,724 INFO L225 Difference]: With dead ends: 74 [2020-09-11 16:16:27,724 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 16:16:27,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:16:27,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 16:16:27,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-11 16:16:27,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-11 16:16:27,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-09-11 16:16:27,728 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-09-11 16:16:27,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:27,728 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-09-11 16:16:27,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:27,728 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-09-11 16:16:27,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:27,729 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:27,729 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:27,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-11 16:16:27,930 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:27,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:27,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-09-11 16:16:27,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:27,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434803956] [2020-09-11 16:16:27,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:28,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:28,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434803956] [2020-09-11 16:16:28,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140513475] [2020-09-11 16:16:28,045 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 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 16:16:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:28,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:28,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:28,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:28,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 16:16:28,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988384228] [2020-09-11 16:16:28,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:28,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:28,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:28,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:28,116 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-09-11 16:16:28,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:28,348 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-09-11 16:16:28,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:28,349 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 16:16:28,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:28,350 INFO L225 Difference]: With dead ends: 75 [2020-09-11 16:16:28,350 INFO L226 Difference]: Without dead ends: 69 [2020-09-11 16:16:28,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:16:28,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-11 16:16:28,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-09-11 16:16:28,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 16:16:28,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 16:16:28,354 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-09-11 16:16:28,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:28,355 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 16:16:28,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:28,355 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 16:16:28,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:28,356 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:28,356 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:28,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:28,566 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:28,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:28,567 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-09-11 16:16:28,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:28,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003632577] [2020-09-11 16:16:28,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:28,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:28,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003632577] [2020-09-11 16:16:28,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514951619] [2020-09-11 16:16:28,673 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 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 16:16:28,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:28,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:28,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:28,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:28,755 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:28,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:28,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 16:16:28,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428521326] [2020-09-11 16:16:28,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:28,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:28,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:28,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:28,770 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-09-11 16:16:29,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:29,083 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-09-11 16:16:29,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:29,083 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 16:16:29,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:29,084 INFO L225 Difference]: With dead ends: 79 [2020-09-11 16:16:29,084 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 16:16:29,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:16:29,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 16:16:29,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-09-11 16:16:29,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 16:16:29,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 16:16:29,088 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-09-11 16:16:29,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:29,088 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 16:16:29,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:29,088 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 16:16:29,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:29,089 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:29,089 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:29,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-11 16:16:29,298 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:29,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:29,299 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-09-11 16:16:29,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:29,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799136221] [2020-09-11 16:16:29,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:29,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799136221] [2020-09-11 16:16:29,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068559948] [2020-09-11 16:16:29,427 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 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 16:16:29,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 16:16:29,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:29,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:29,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:29,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:29,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 16:16:29,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260952407] [2020-09-11 16:16:29,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:29,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:29,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:29,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:29,527 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-09-11 16:16:29,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:29,799 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-09-11 16:16:29,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:16:29,800 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 16:16:29,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:29,801 INFO L225 Difference]: With dead ends: 79 [2020-09-11 16:16:29,801 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 16:16:29,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:16:29,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 16:16:29,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-09-11 16:16:29,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-11 16:16:29,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-09-11 16:16:29,804 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-09-11 16:16:29,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:29,804 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-09-11 16:16:29,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:29,805 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-09-11 16:16:29,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:29,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:29,805 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:30,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:30,006 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:30,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:30,006 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-09-11 16:16:30,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:30,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670286812] [2020-09-11 16:16:30,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:30,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670286812] [2020-09-11 16:16:30,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284630468] [2020-09-11 16:16:30,106 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 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 16:16:30,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:30,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:30,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:30,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:30,184 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:30,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:30,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 16:16:30,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003122856] [2020-09-11 16:16:30,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:30,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:30,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:30,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:30,201 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-09-11 16:16:30,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:30,562 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-09-11 16:16:30,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:16:30,563 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 16:16:30,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:30,564 INFO L225 Difference]: With dead ends: 76 [2020-09-11 16:16:30,564 INFO L226 Difference]: Without dead ends: 70 [2020-09-11 16:16:30,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:16:30,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-11 16:16:30,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-09-11 16:16:30,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 16:16:30,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-11 16:16:30,569 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-09-11 16:16:30,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:30,569 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-11 16:16:30,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:30,569 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-11 16:16:30,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:30,570 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:30,570 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:30,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-11 16:16:30,771 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:30,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:30,771 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-09-11 16:16:30,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:30,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499556234] [2020-09-11 16:16:30,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:30,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499556234] [2020-09-11 16:16:30,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411984545] [2020-09-11 16:16:30,862 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 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 16:16:30,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 16:16:30,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:30,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:30,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:30,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:30,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:30,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 16:16:30,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555487220] [2020-09-11 16:16:30,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:16:30,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:30,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:16:30,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:16:30,947 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-09-11 16:16:31,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:31,245 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-09-11 16:16:31,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:31,245 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 16:16:31,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:31,246 INFO L225 Difference]: With dead ends: 96 [2020-09-11 16:16:31,246 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 16:16:31,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:16:31,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 16:16:31,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-09-11 16:16:31,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:16:31,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-09-11 16:16:31,250 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-09-11 16:16:31,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:31,250 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-09-11 16:16:31,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:16:31,250 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-09-11 16:16:31,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:16:31,251 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:31,251 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:31,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-11 16:16:31,452 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:31,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:31,452 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-09-11 16:16:31,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:31,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827399494] [2020-09-11 16:16:31,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:31,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827399494] [2020-09-11 16:16:31,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504169526] [2020-09-11 16:16:31,568 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 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 16:16:31,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 16:16:31,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:31,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:16:31,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:31,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:31,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:31,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 16:16:31,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713907732] [2020-09-11 16:16:31,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:31,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:31,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:31,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:31,670 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-09-11 16:16:32,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:32,120 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-09-11 16:16:32,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:16:32,121 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 16:16:32,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:32,122 INFO L225 Difference]: With dead ends: 77 [2020-09-11 16:16:32,122 INFO L226 Difference]: Without dead ends: 69 [2020-09-11 16:16:32,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-11 16:16:32,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-11 16:16:32,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-11 16:16:32,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 16:16:32,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-09-11 16:16:32,125 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-09-11 16:16:32,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:32,125 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-09-11 16:16:32,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:32,126 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-09-11 16:16:32,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:32,126 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:32,126 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:32,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-11 16:16:32,336 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:32,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:32,337 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-09-11 16:16:32,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:32,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497148457] [2020-09-11 16:16:32,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:32,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:32,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497148457] [2020-09-11 16:16:32,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094094893] [2020-09-11 16:16:32,504 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 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 16:16:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:32,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:32,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:32,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:32,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:32,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 16:16:32,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288002127] [2020-09-11 16:16:32,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:32,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:32,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:32,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:32,574 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-09-11 16:16:32,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:32,798 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-11 16:16:32,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:16:32,798 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 16:16:32,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:32,799 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:16:32,800 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 16:16:32,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:16:32,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 16:16:32,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-11 16:16:32,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 16:16:32,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 16:16:32,805 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 16:16:32,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:32,805 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 16:16:32,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:32,806 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 16:16:32,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:32,807 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:32,807 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:33,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-11 16:16:33,011 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:33,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:33,012 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-09-11 16:16:33,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:33,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568879334] [2020-09-11 16:16:33,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:33,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568879334] [2020-09-11 16:16:33,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328853710] [2020-09-11 16:16:33,149 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 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 16:16:33,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:33,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:33,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:33,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:33,224 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:33,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:33,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 16:16:33,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244040993] [2020-09-11 16:16:33,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:33,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:33,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:33,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:33,240 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 16:16:33,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:33,557 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-11 16:16:33,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:33,557 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 16:16:33,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:33,558 INFO L225 Difference]: With dead ends: 81 [2020-09-11 16:16:33,559 INFO L226 Difference]: Without dead ends: 75 [2020-09-11 16:16:33,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:16:33,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-11 16:16:33,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-09-11 16:16:33,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 16:16:33,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 16:16:33,562 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 16:16:33,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:33,563 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 16:16:33,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:33,563 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 16:16:33,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:33,563 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:33,564 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:33,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-11 16:16:33,771 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:33,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:33,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-09-11 16:16:33,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:33,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844473986] [2020-09-11 16:16:33,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:33,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:33,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844473986] [2020-09-11 16:16:33,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081077912] [2020-09-11 16:16:33,886 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 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 16:16:33,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 16:16:33,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:33,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:33,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:33,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:33,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 16:16:33,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577861211] [2020-09-11 16:16:33,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:33,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:33,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:33,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:33,969 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 16:16:34,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:34,218 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-11 16:16:34,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:34,219 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 16:16:34,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:34,220 INFO L225 Difference]: With dead ends: 78 [2020-09-11 16:16:34,220 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 16:16:34,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:16:34,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 16:16:34,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-09-11 16:16:34,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 16:16:34,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 16:16:34,223 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 16:16:34,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:34,223 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 16:16:34,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:34,224 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 16:16:34,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:34,224 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:34,224 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:34,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-11 16:16:34,433 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:34,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:34,434 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-09-11 16:16:34,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:34,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45660410] [2020-09-11 16:16:34,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:34,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:34,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:34,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45660410] [2020-09-11 16:16:34,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321527483] [2020-09-11 16:16:34,572 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 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 16:16:34,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:34,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:34,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:34,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:34,646 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:34,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:34,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 16:16:34,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291755939] [2020-09-11 16:16:34,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:34,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:34,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:34,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:34,675 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 16:16:35,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:35,072 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-11 16:16:35,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:16:35,075 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 16:16:35,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:35,076 INFO L225 Difference]: With dead ends: 77 [2020-09-11 16:16:35,076 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 16:16:35,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:16:35,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 16:16:35,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-09-11 16:16:35,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 16:16:35,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 16:16:35,079 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 16:16:35,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:35,080 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 16:16:35,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:35,080 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 16:16:35,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:35,080 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:35,081 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:35,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-11 16:16:35,285 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:35,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:35,286 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-09-11 16:16:35,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:35,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800607757] [2020-09-11 16:16:35,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:35,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800607757] [2020-09-11 16:16:35,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698473396] [2020-09-11 16:16:35,414 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 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 16:16:35,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 16:16:35,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:35,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:35,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:35,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:35,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:35,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 16:16:35,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365056614] [2020-09-11 16:16:35,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:35,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:35,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:35,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:35,490 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 16:16:35,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:35,814 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-09-11 16:16:35,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:16:35,815 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 16:16:35,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:35,816 INFO L225 Difference]: With dead ends: 74 [2020-09-11 16:16:35,816 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 16:16:35,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:16:35,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 16:16:35,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-09-11 16:16:35,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 16:16:35,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 16:16:35,820 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 16:16:35,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:35,820 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 16:16:35,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:35,820 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 16:16:35,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:35,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:35,821 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:36,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:36,030 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:36,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:36,031 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-09-11 16:16:36,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:36,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284194892] [2020-09-11 16:16:36,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:36,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284194892] [2020-09-11 16:16:36,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823523985] [2020-09-11 16:16:36,140 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 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 16:16:36,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 16:16:36,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:36,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:36,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:36,222 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:36,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:36,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:36,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 16:16:36,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501208201] [2020-09-11 16:16:36,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:36,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:36,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:36,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:36,240 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 16:16:36,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:36,728 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-09-11 16:16:36,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:16:36,728 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 16:16:36,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:36,729 INFO L225 Difference]: With dead ends: 73 [2020-09-11 16:16:36,729 INFO L226 Difference]: Without dead ends: 67 [2020-09-11 16:16:36,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:16:36,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-11 16:16:36,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-09-11 16:16:36,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 16:16:36,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 16:16:36,734 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 16:16:36,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:36,734 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 16:16:36,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:36,734 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 16:16:36,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:36,735 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:36,735 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:36,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-11 16:16:36,936 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:36,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:36,936 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-09-11 16:16:36,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:36,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950973339] [2020-09-11 16:16:36,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:37,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:37,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950973339] [2020-09-11 16:16:37,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165244899] [2020-09-11 16:16:37,037 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 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 16:16:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:37,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:37,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:37,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:37,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 16:16:37,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990676963] [2020-09-11 16:16:37,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:16:37,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:37,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:16:37,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:16:37,112 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 16:16:37,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:37,500 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-11 16:16:37,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:37,501 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 16:16:37,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:37,502 INFO L225 Difference]: With dead ends: 89 [2020-09-11 16:16:37,502 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 16:16:37,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-09-11 16:16:37,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 16:16:37,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-11 16:16:37,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 16:16:37,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-09-11 16:16:37,506 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-09-11 16:16:37,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:37,507 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-09-11 16:16:37,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:16:37,507 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-09-11 16:16:37,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:37,507 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:37,508 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:37,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:37,717 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:37,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:37,718 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-09-11 16:16:37,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:37,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181529569] [2020-09-11 16:16:37,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:37,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181529569] [2020-09-11 16:16:37,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372550270] [2020-09-11 16:16:37,831 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 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 16:16:37,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:37,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:37,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:37,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:37,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:37,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 16:16:37,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750781972] [2020-09-11 16:16:37,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:37,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:37,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:37,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:37,948 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-09-11 16:16:38,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:38,371 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-09-11 16:16:38,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:16:38,372 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 16:16:38,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:38,373 INFO L225 Difference]: With dead ends: 68 [2020-09-11 16:16:38,373 INFO L226 Difference]: Without dead ends: 60 [2020-09-11 16:16:38,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:16:38,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-11 16:16:38,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-09-11 16:16:38,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-11 16:16:38,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-09-11 16:16:38,379 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-09-11 16:16:38,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:38,380 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-09-11 16:16:38,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:38,380 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-09-11 16:16:38,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:16:38,380 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:38,380 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:38,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-11 16:16:38,589 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:38,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:38,590 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-09-11 16:16:38,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:38,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403778040] [2020-09-11 16:16:38,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:38,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403778040] [2020-09-11 16:16:38,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624458125] [2020-09-11 16:16:38,699 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 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 16:16:38,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 16:16:38,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:38,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:16:38,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:38,771 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:38,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:38,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 16:16:38,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747628203] [2020-09-11 16:16:38,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:38,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:38,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:38,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:38,789 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-09-11 16:16:39,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:39,267 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-09-11 16:16:39,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:39,267 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 16:16:39,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:39,268 INFO L225 Difference]: With dead ends: 76 [2020-09-11 16:16:39,268 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 16:16:39,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:16:39,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 16:16:39,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-09-11 16:16:39,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:16:39,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-11 16:16:39,272 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-09-11 16:16:39,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:39,272 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-11 16:16:39,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:39,273 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-11 16:16:39,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:39,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:39,273 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:39,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:39,482 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:39,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:39,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-09-11 16:16:39,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:39,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142346046] [2020-09-11 16:16:39,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:39,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142346046] [2020-09-11 16:16:39,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936061425] [2020-09-11 16:16:39,598 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 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 16:16:39,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:39,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:39,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:39,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:39,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:39,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:39,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:39,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101507301] [2020-09-11 16:16:39,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:39,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:39,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:39,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:39,717 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-09-11 16:16:40,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:40,203 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-09-11 16:16:40,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:40,204 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:40,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:40,205 INFO L225 Difference]: With dead ends: 66 [2020-09-11 16:16:40,205 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 16:16:40,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:16:40,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 16:16:40,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-09-11 16:16:40,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:16:40,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-11 16:16:40,209 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-09-11 16:16:40,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:40,209 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-11 16:16:40,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:40,209 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-11 16:16:40,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:40,210 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:40,210 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:40,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-11 16:16:40,418 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:40,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:40,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-09-11 16:16:40,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:40,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370061348] [2020-09-11 16:16:40,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:40,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:40,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370061348] [2020-09-11 16:16:40,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848907738] [2020-09-11 16:16:40,581 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 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 16:16:40,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 16:16:40,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:40,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:40,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:40,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:40,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 16:16:40,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076819007] [2020-09-11 16:16:40,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:40,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:40,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:40,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:40,652 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-09-11 16:16:40,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:40,894 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-09-11 16:16:40,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:16:40,895 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 16:16:40,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:40,896 INFO L225 Difference]: With dead ends: 72 [2020-09-11 16:16:40,896 INFO L226 Difference]: Without dead ends: 66 [2020-09-11 16:16:40,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:16:40,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-11 16:16:40,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-11 16:16:40,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 16:16:40,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-11 16:16:40,900 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-09-11 16:16:40,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:40,900 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-11 16:16:40,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:40,900 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-11 16:16:40,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:40,901 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:40,901 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:41,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-11 16:16:41,110 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:41,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:41,110 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-09-11 16:16:41,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:41,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899827665] [2020-09-11 16:16:41,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:41,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899827665] [2020-09-11 16:16:41,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240040046] [2020-09-11 16:16:41,266 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 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 16:16:41,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 16:16:41,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:41,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:41,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:41,346 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:41,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:41,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:41,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110125415] [2020-09-11 16:16:41,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:41,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:41,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:41,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:41,361 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-09-11 16:16:41,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:41,651 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-09-11 16:16:41,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:16:41,652 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:41,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:41,653 INFO L225 Difference]: With dead ends: 82 [2020-09-11 16:16:41,653 INFO L226 Difference]: Without dead ends: 76 [2020-09-11 16:16:41,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:16:41,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-11 16:16:41,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-11 16:16:41,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 16:16:41,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-09-11 16:16:41,656 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-09-11 16:16:41,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:41,657 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-09-11 16:16:41,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:41,657 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-09-11 16:16:41,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:41,657 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:41,657 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:41,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-11 16:16:41,858 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:41,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:41,859 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-09-11 16:16:41,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:41,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998055059] [2020-09-11 16:16:41,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:42,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998055059] [2020-09-11 16:16:42,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435327093] [2020-09-11 16:16:42,002 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 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 16:16:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:42,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:42,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:42,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:42,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 16:16:42,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103597371] [2020-09-11 16:16:42,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:42,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:42,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:42,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:42,065 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-09-11 16:16:42,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:42,369 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-09-11 16:16:42,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:16:42,370 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 16:16:42,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:42,370 INFO L225 Difference]: With dead ends: 83 [2020-09-11 16:16:42,371 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 16:16:42,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:16:42,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 16:16:42,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-09-11 16:16:42,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 16:16:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-09-11 16:16:42,374 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-09-11 16:16:42,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:42,374 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-09-11 16:16:42,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:42,375 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-09-11 16:16:42,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:42,375 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:42,375 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:42,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-11 16:16:42,584 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:42,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:42,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-09-11 16:16:42,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:42,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688526062] [2020-09-11 16:16:42,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:42,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688526062] [2020-09-11 16:16:42,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393037318] [2020-09-11 16:16:42,740 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 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 16:16:42,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:42,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:42,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:42,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:42,819 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:42,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:42,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:42,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307852628] [2020-09-11 16:16:42,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:42,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:42,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:42,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:42,833 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-09-11 16:16:43,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:43,207 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-09-11 16:16:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:16:43,208 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:43,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:43,210 INFO L225 Difference]: With dead ends: 89 [2020-09-11 16:16:43,210 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 16:16:43,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-11 16:16:43,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 16:16:43,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-09-11 16:16:43,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 16:16:43,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-09-11 16:16:43,213 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-09-11 16:16:43,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:43,214 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-09-11 16:16:43,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:43,214 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-09-11 16:16:43,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:43,215 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:43,215 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:43,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:43,416 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:43,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-09-11 16:16:43,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:43,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985606133] [2020-09-11 16:16:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:43,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:43,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985606133] [2020-09-11 16:16:43,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332881393] [2020-09-11 16:16:43,548 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 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 16:16:43,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 16:16:43,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:43,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:43,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:43,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:43,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 16:16:43,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157438965] [2020-09-11 16:16:43,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:43,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:43,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:43,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:43,638 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-09-11 16:16:44,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:44,014 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-09-11 16:16:44,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:44,015 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 16:16:44,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:44,016 INFO L225 Difference]: With dead ends: 89 [2020-09-11 16:16:44,016 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 16:16:44,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:16:44,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 16:16:44,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-09-11 16:16:44,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 16:16:44,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 16:16:44,022 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-09-11 16:16:44,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:44,022 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 16:16:44,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:44,022 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 16:16:44,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:44,023 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:44,023 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:44,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:44,233 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:44,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:44,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-09-11 16:16:44,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:44,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335357237] [2020-09-11 16:16:44,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:44,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335357237] [2020-09-11 16:16:44,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463618478] [2020-09-11 16:16:44,379 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 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 16:16:44,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:44,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:44,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:44,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:44,460 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:44,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:44,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:44,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379498754] [2020-09-11 16:16:44,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:44,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:44,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:44,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:44,476 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-09-11 16:16:44,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:44,963 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-09-11 16:16:44,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:16:44,963 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:44,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:44,964 INFO L225 Difference]: With dead ends: 86 [2020-09-11 16:16:44,964 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 16:16:44,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:16:44,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 16:16:44,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-09-11 16:16:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 16:16:44,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 16:16:44,967 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-09-11 16:16:44,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:44,968 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 16:16:44,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:44,968 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 16:16:44,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:44,968 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:44,968 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:45,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-11 16:16:45,176 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:45,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:45,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-09-11 16:16:45,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:45,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199545415] [2020-09-11 16:16:45,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:45,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199545415] [2020-09-11 16:16:45,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953865291] [2020-09-11 16:16:45,303 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 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 16:16:45,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 16:16:45,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:45,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:45,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:45,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:45,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 16:16:45,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900477288] [2020-09-11 16:16:45,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:45,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:45,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:45,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:45,381 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-09-11 16:16:45,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:45,824 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-09-11 16:16:45,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:16:45,825 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 16:16:45,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:45,826 INFO L225 Difference]: With dead ends: 87 [2020-09-11 16:16:45,826 INFO L226 Difference]: Without dead ends: 81 [2020-09-11 16:16:45,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:16:45,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-11 16:16:45,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-09-11 16:16:45,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-11 16:16:45,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-09-11 16:16:45,829 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-09-11 16:16:45,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:45,829 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-09-11 16:16:45,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:45,829 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-09-11 16:16:45,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:45,830 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:45,830 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:46,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:46,037 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:46,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:46,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-09-11 16:16:46,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:46,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116358478] [2020-09-11 16:16:46,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:46,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116358478] [2020-09-11 16:16:46,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143461468] [2020-09-11 16:16:46,175 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 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 16:16:46,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 16:16:46,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:46,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:46,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:46,259 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:46,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:46,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:46,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261549262] [2020-09-11 16:16:46,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:46,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:46,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:46,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:46,277 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-09-11 16:16:46,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:46,841 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-09-11 16:16:46,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:16:46,842 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:46,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:46,843 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:16:46,843 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 16:16:46,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:16:46,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 16:16:46,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-09-11 16:16:46,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:16:46,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-11 16:16:46,848 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-09-11 16:16:46,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:46,848 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-11 16:16:46,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:46,848 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-11 16:16:46,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:46,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:46,849 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:47,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-11 16:16:47,058 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:47,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:47,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-09-11 16:16:47,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:47,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622635680] [2020-09-11 16:16:47,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:47,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622635680] [2020-09-11 16:16:47,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501329102] [2020-09-11 16:16:47,170 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 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 16:16:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:47,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:47,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:47,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:47,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 16:16:47,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930439952] [2020-09-11 16:16:47,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:16:47,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:47,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:16:47,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:16:47,276 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-09-11 16:16:47,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:47,759 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-11 16:16:47,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:16:47,759 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 16:16:47,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:47,760 INFO L225 Difference]: With dead ends: 104 [2020-09-11 16:16:47,760 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 16:16:47,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:16:47,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 16:16:47,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-09-11 16:16:47,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 16:16:47,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-09-11 16:16:47,763 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-09-11 16:16:47,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:47,764 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-09-11 16:16:47,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:16:47,764 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-09-11 16:16:47,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 16:16:47,764 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:47,765 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:47,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-11 16:16:47,973 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:47,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:47,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-09-11 16:16:47,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:47,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647620234] [2020-09-11 16:16:47,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:47,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:48,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647620234] [2020-09-11 16:16:48,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306056581] [2020-09-11 16:16:48,094 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 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 16:16:48,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:48,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:48,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:16:48,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:48,175 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:48,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:48,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:48,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:16:48,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665238268] [2020-09-11 16:16:48,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:48,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:48,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:48,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:48,190 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-09-11 16:16:48,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:48,795 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-09-11 16:16:48,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:16:48,796 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 16:16:48,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:48,796 INFO L225 Difference]: With dead ends: 85 [2020-09-11 16:16:48,797 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 16:16:48,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:16:48,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 16:16:48,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-09-11 16:16:48,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-11 16:16:48,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-09-11 16:16:48,799 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-09-11 16:16:48,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:48,800 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-09-11 16:16:48,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:48,800 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-09-11 16:16:48,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:48,801 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:48,801 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:49,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-11 16:16:49,010 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:49,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:49,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-09-11 16:16:49,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:49,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654407158] [2020-09-11 16:16:49,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:49,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654407158] [2020-09-11 16:16:49,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80416153] [2020-09-11 16:16:49,218 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 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 16:16:49,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 16:16:49,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:49,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:49,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:49,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:49,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 16:16:49,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805974787] [2020-09-11 16:16:49,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:49,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:49,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:49,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:49,296 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-09-11 16:16:49,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:49,551 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-11 16:16:49,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:16:49,556 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 16:16:49,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:49,557 INFO L225 Difference]: With dead ends: 94 [2020-09-11 16:16:49,557 INFO L226 Difference]: Without dead ends: 88 [2020-09-11 16:16:49,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:16:49,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-11 16:16:49,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-09-11 16:16:49,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:16:49,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 16:16:49,561 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 16:16:49,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:49,561 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 16:16:49,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:49,562 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 16:16:49,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:49,562 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:49,562 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:49,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-11 16:16:49,763 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:49,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:49,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-09-11 16:16:49,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:49,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683095951] [2020-09-11 16:16:49,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:49,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683095951] [2020-09-11 16:16:49,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165930079] [2020-09-11 16:16:49,950 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 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 16:16:50,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:50,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:50,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:50,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:50,030 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:50,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:50,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:16:50,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616210778] [2020-09-11 16:16:50,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:16:50,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:50,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:16:50,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:50,046 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 16:16:50,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:50,441 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-09-11 16:16:50,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:16:50,442 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:16:50,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:50,443 INFO L225 Difference]: With dead ends: 91 [2020-09-11 16:16:50,443 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 16:16:50,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:16:50,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 16:16:50,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-11 16:16:50,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:16:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 16:16:50,447 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 16:16:50,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:50,447 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 16:16:50,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:16:50,447 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 16:16:50,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:50,448 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:50,448 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:50,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-11 16:16:50,649 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:50,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:50,649 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-09-11 16:16:50,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:50,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109310007] [2020-09-11 16:16:50,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:50,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109310007] [2020-09-11 16:16:50,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692982096] [2020-09-11 16:16:50,818 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 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 16:16:50,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 16:16:50,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:50,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:50,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:50,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:50,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 16:16:50,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514725675] [2020-09-11 16:16:50,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:50,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:50,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:50,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:50,886 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 16:16:51,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:51,238 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-11 16:16:51,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:16:51,238 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 16:16:51,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:51,239 INFO L225 Difference]: With dead ends: 88 [2020-09-11 16:16:51,239 INFO L226 Difference]: Without dead ends: 82 [2020-09-11 16:16:51,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-09-11 16:16:51,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-11 16:16:51,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-09-11 16:16:51,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:16:51,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 16:16:51,243 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 16:16:51,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:51,243 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 16:16:51,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:51,243 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 16:16:51,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:51,243 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:51,244 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:51,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:51,444 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:51,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:51,445 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-09-11 16:16:51,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:51,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170289710] [2020-09-11 16:16:51,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:51,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170289710] [2020-09-11 16:16:51,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141843242] [2020-09-11 16:16:51,623 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 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 16:16:51,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 16:16:51,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:51,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:51,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:51,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:51,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:51,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:16:51,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829028488] [2020-09-11 16:16:51,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:16:51,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:51,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:16:51,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:51,731 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 16:16:52,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:52,221 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-09-11 16:16:52,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:16:52,222 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:16:52,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:52,223 INFO L225 Difference]: With dead ends: 87 [2020-09-11 16:16:52,223 INFO L226 Difference]: Without dead ends: 81 [2020-09-11 16:16:52,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:16:52,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-11 16:16:52,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-09-11 16:16:52,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:16:52,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 16:16:52,227 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 16:16:52,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:52,227 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 16:16:52,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:16:52,227 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 16:16:52,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:52,228 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:52,228 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:52,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:52,431 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:52,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:52,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-09-11 16:16:52,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:52,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578456019] [2020-09-11 16:16:52,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:52,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578456019] [2020-09-11 16:16:52,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855828560] [2020-09-11 16:16:52,569 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 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 16:16:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:52,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:52,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:52,648 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:52,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:52,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 16:16:52,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036119893] [2020-09-11 16:16:52,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:52,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:52,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:52,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:52,650 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 16:16:53,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:53,013 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-11 16:16:53,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:16:53,014 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 16:16:53,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:53,015 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:16:53,015 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 16:16:53,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:16:53,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 16:16:53,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-09-11 16:16:53,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:16:53,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 16:16:53,018 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 16:16:53,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:53,018 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 16:16:53,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:53,018 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 16:16:53,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:53,019 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:53,019 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:53,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-11 16:16:53,220 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:53,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:53,220 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-09-11 16:16:53,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:53,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920049151] [2020-09-11 16:16:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:53,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920049151] [2020-09-11 16:16:53,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823194595] [2020-09-11 16:16:53,390 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 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 16:16:53,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:53,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:53,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:53,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:53,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:53,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:53,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:16:53,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220930680] [2020-09-11 16:16:53,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:16:53,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:53,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:16:53,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:53,504 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 16:16:54,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:54,084 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-11 16:16:54,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:16:54,085 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:16:54,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:54,086 INFO L225 Difference]: With dead ends: 83 [2020-09-11 16:16:54,086 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 16:16:54,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:16:54,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 16:16:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-09-11 16:16:54,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:16:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 16:16:54,090 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 16:16:54,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:54,090 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 16:16:54,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:16:54,090 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 16:16:54,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:54,091 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:54,091 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:54,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:54,300 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:54,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:54,301 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-09-11 16:16:54,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:54,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406614474] [2020-09-11 16:16:54,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:54,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406614474] [2020-09-11 16:16:54,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463601451] [2020-09-11 16:16:54,429 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 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 16:16:54,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 16:16:54,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:54,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:54,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:54,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:54,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 16:16:54,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847158791] [2020-09-11 16:16:54,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:54,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:54,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:54,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:54,509 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 16:16:54,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:54,993 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-09-11 16:16:54,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:16:54,994 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 16:16:54,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:54,995 INFO L225 Difference]: With dead ends: 80 [2020-09-11 16:16:54,995 INFO L226 Difference]: Without dead ends: 74 [2020-09-11 16:16:54,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:16:54,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-11 16:16:54,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-09-11 16:16:54,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:16:54,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 16:16:54,998 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 16:16:54,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:54,998 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 16:16:54,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:54,999 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 16:16:54,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:54,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:54,999 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:55,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-11 16:16:55,200 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:55,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:55,201 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-09-11 16:16:55,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:55,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358241507] [2020-09-11 16:16:55,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:55,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358241507] [2020-09-11 16:16:55,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245396419] [2020-09-11 16:16:55,339 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 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 16:16:55,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:16:55,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:55,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:55,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:55,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:55,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:55,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:16:55,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373112843] [2020-09-11 16:16:55,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:16:55,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:55,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:16:55,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:55,441 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 16:16:56,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:56,101 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-09-11 16:16:56,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:16:56,101 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:16:56,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:56,102 INFO L225 Difference]: With dead ends: 79 [2020-09-11 16:16:56,102 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 16:16:56,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 16:16:56,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 16:16:56,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-09-11 16:16:56,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:16:56,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 16:16:56,105 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 16:16:56,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:56,106 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 16:16:56,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:16:56,106 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 16:16:56,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:56,106 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:56,106 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:56,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:56,316 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:56,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:56,317 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-09-11 16:16:56,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:56,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952896252] [2020-09-11 16:16:56,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:56,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952896252] [2020-09-11 16:16:56,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551327739] [2020-09-11 16:16:56,459 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 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 16:16:56,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 16:16:56,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:56,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:56,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:56,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:56,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 16:16:56,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450996540] [2020-09-11 16:16:56,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:16:56,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:56,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:16:56,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:16:56,542 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 16:16:57,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:57,060 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-11 16:16:57,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:16:57,061 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 16:16:57,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:57,062 INFO L225 Difference]: With dead ends: 95 [2020-09-11 16:16:57,062 INFO L226 Difference]: Without dead ends: 89 [2020-09-11 16:16:57,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:16:57,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-11 16:16:57,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-09-11 16:16:57,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 16:16:57,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-09-11 16:16:57,066 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-09-11 16:16:57,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:57,067 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-09-11 16:16:57,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:16:57,067 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-09-11 16:16:57,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:57,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:57,067 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:57,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-11 16:16:57,270 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:57,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:57,271 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-09-11 16:16:57,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:57,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960933045] [2020-09-11 16:16:57,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:57,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960933045] [2020-09-11 16:16:57,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010117988] [2020-09-11 16:16:57,398 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 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 16:16:57,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 16:16:57,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:57,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:57,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:57,488 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:16:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:57,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:57,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:16:57,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796572603] [2020-09-11 16:16:57,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:16:57,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:57,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:16:57,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:57,501 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-09-11 16:16:58,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:58,218 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-09-11 16:16:58,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:16:58,219 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:16:58,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:58,220 INFO L225 Difference]: With dead ends: 76 [2020-09-11 16:16:58,220 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 16:16:58,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:16:58,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 16:16:58,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-09-11 16:16:58,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-11 16:16:58,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-09-11 16:16:58,222 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-09-11 16:16:58,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:58,222 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-09-11 16:16:58,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:16:58,222 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-09-11 16:16:58,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 16:16:58,223 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:58,223 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:58,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:16:58,424 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:58,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:58,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-09-11 16:16:58,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:58,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172289470] [2020-09-11 16:16:58,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:58,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172289470] [2020-09-11 16:16:58,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758143007] [2020-09-11 16:16:58,565 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 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 16:16:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:58,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:16:58,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:58,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:58,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:58,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:16:58,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371240574] [2020-09-11 16:16:58,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:16:58,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:58,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:16:58,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:16:58,659 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-09-11 16:16:59,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:16:59,316 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-09-11 16:16:59,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:16:59,317 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 16:16:59,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:16:59,318 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:16:59,318 INFO L226 Difference]: Without dead ends: 79 [2020-09-11 16:16:59,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:16:59,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-11 16:16:59,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-09-11 16:16:59,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 16:16:59,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-11 16:16:59,321 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-09-11 16:16:59,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:16:59,321 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-11 16:16:59,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:16:59,321 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-11 16:16:59,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:16:59,321 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:16:59,321 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:16:59,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-11 16:16:59,523 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:16:59,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:16:59,523 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-09-11 16:16:59,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:16:59,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105538196] [2020-09-11 16:16:59,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:16:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:16:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:59,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105538196] [2020-09-11 16:16:59,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41061611] [2020-09-11 16:16:59,688 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 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 16:16:59,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:16:59,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:16:59,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:16:59,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:16:59,771 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:16:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:16:59,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:16:59,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:16:59,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66837784] [2020-09-11 16:16:59,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:16:59,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:16:59,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:16:59,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:16:59,792 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-09-11 16:17:00,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:00,494 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-09-11 16:17:00,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:17:00,495 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:00,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:00,496 INFO L225 Difference]: With dead ends: 72 [2020-09-11 16:17:00,496 INFO L226 Difference]: Without dead ends: 67 [2020-09-11 16:17:00,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:17:00,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-11 16:17:00,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-09-11 16:17:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 16:17:00,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-11 16:17:00,500 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-09-11 16:17:00,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:00,501 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-11 16:17:00,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:00,501 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-11 16:17:00,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:00,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:00,502 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:00,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-11 16:17:00,702 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:00,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:00,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-09-11 16:17:00,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:00,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349598095] [2020-09-11 16:17:00,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:00,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349598095] [2020-09-11 16:17:00,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616949874] [2020-09-11 16:17:00,900 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 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 16:17:00,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 16:17:00,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:00,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:00,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:00,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:00,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:00,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139878883] [2020-09-11 16:17:00,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:00,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:00,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:00,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:00,976 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-09-11 16:17:01,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:01,280 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-09-11 16:17:01,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:17:01,281 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:01,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:01,282 INFO L225 Difference]: With dead ends: 78 [2020-09-11 16:17:01,282 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 16:17:01,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-09-11 16:17:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 16:17:01,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-09-11 16:17:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:17:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-09-11 16:17:01,285 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-09-11 16:17:01,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:01,285 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-09-11 16:17:01,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:01,285 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-09-11 16:17:01,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:01,286 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:01,286 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:01,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:01,490 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:01,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:01,491 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-09-11 16:17:01,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:01,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281712151] [2020-09-11 16:17:01,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:01,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281712151] [2020-09-11 16:17:01,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922928038] [2020-09-11 16:17:01,663 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 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 16:17:01,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:01,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:01,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:01,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:01,750 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:01,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:01,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:01,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748775839] [2020-09-11 16:17:01,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:01,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:01,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:01,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:01,763 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-09-11 16:17:02,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:02,117 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-09-11 16:17:02,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:17:02,117 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:02,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:02,118 INFO L225 Difference]: With dead ends: 90 [2020-09-11 16:17:02,119 INFO L226 Difference]: Without dead ends: 84 [2020-09-11 16:17:02,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:17:02,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-11 16:17:02,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-09-11 16:17:02,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 16:17:02,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-09-11 16:17:02,122 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-09-11 16:17:02,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:02,122 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-09-11 16:17:02,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:02,122 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-09-11 16:17:02,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:02,123 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:02,123 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:02,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:02,332 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:02,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:02,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-09-11 16:17:02,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:02,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067655568] [2020-09-11 16:17:02,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:02,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067655568] [2020-09-11 16:17:02,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527299723] [2020-09-11 16:17:02,511 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 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 16:17:02,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 16:17:02,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:02,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:02,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:02,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:02,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:02,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64423849] [2020-09-11 16:17:02,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:02,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:02,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:02,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:02,590 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-09-11 16:17:02,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:02,997 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-09-11 16:17:02,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:17:02,997 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:02,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:02,998 INFO L225 Difference]: With dead ends: 91 [2020-09-11 16:17:02,999 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 16:17:02,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:17:02,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 16:17:03,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-09-11 16:17:03,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-11 16:17:03,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-09-11 16:17:03,001 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-09-11 16:17:03,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:03,001 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-09-11 16:17:03,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:03,001 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-09-11 16:17:03,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:03,001 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:03,001 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:03,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:03,202 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:03,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:03,203 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-09-11 16:17:03,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:03,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280968479] [2020-09-11 16:17:03,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:03,385 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:03,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280968479] [2020-09-11 16:17:03,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381250618] [2020-09-11 16:17:03,386 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 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 16:17:03,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 16:17:03,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:03,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:03,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:03,496 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:03,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:03,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:03,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466761701] [2020-09-11 16:17:03,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:03,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:03,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:03,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:03,514 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-09-11 16:17:04,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:04,023 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-09-11 16:17:04,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:17:04,024 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:04,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:04,025 INFO L225 Difference]: With dead ends: 99 [2020-09-11 16:17:04,025 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 16:17:04,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:17:04,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 16:17:04,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-09-11 16:17:04,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:17:04,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-09-11 16:17:04,030 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-09-11 16:17:04,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:04,030 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-09-11 16:17:04,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:04,030 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-09-11 16:17:04,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:04,031 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:04,031 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:04,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:04,232 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:04,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:04,233 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-09-11 16:17:04,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:04,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632225226] [2020-09-11 16:17:04,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:04,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632225226] [2020-09-11 16:17:04,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942044288] [2020-09-11 16:17:04,439 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 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 16:17:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:04,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:04,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:04,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:04,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:04,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759722871] [2020-09-11 16:17:04,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:04,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:04,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:04,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:04,534 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-09-11 16:17:04,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:04,928 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-11 16:17:04,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:17:04,929 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:04,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:04,930 INFO L225 Difference]: With dead ends: 99 [2020-09-11 16:17:04,930 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 16:17:04,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:17:04,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 16:17:04,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-09-11 16:17:04,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-11 16:17:04,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-09-11 16:17:04,933 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-09-11 16:17:04,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:04,934 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-09-11 16:17:04,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:04,934 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-09-11 16:17:04,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:04,934 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:04,934 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:05,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-09-11 16:17:05,143 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:05,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:05,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-09-11 16:17:05,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:05,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064479835] [2020-09-11 16:17:05,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:05,317 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:05,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064479835] [2020-09-11 16:17:05,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184093991] [2020-09-11 16:17:05,318 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 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 16:17:05,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:05,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:05,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:05,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:05,401 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:05,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:05,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:05,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091172656] [2020-09-11 16:17:05,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:05,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:05,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:05,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:05,421 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-09-11 16:17:05,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:05,976 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-09-11 16:17:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:17:05,977 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:05,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:05,978 INFO L225 Difference]: With dead ends: 96 [2020-09-11 16:17:05,978 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 16:17:05,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:17:05,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 16:17:05,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-09-11 16:17:05,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 16:17:05,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-09-11 16:17:05,981 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-09-11 16:17:05,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:05,981 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-09-11 16:17:05,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:05,981 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-09-11 16:17:05,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:05,982 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:05,982 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:06,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:06,183 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:06,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:06,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-09-11 16:17:06,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:06,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055744734] [2020-09-11 16:17:06,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:06,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055744734] [2020-09-11 16:17:06,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674503718] [2020-09-11 16:17:06,350 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 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 16:17:06,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 16:17:06,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:06,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:06,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:06,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:06,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:06,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104245961] [2020-09-11 16:17:06,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:06,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:06,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:06,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:06,431 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-09-11 16:17:06,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:06,852 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-09-11 16:17:06,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:17:06,853 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:06,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:06,854 INFO L225 Difference]: With dead ends: 97 [2020-09-11 16:17:06,854 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 16:17:06,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 16:17:06,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 16:17:06,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-09-11 16:17:06,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:17:06,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 16:17:06,857 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-09-11 16:17:06,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:06,857 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 16:17:06,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 16:17:06,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:06,858 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:06,858 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:07,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-11 16:17:07,059 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:07,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:07,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-09-11 16:17:07,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:07,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41762229] [2020-09-11 16:17:07,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:07,235 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:07,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41762229] [2020-09-11 16:17:07,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084457108] [2020-09-11 16:17:07,236 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 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 16:17:07,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:07,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:07,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:07,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:07,320 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:07,338 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:07,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:07,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:07,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925601980] [2020-09-11 16:17:07,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:07,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:07,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:07,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:07,340 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-09-11 16:17:07,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:07,997 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-11 16:17:07,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:17:07,998 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:07,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:07,999 INFO L225 Difference]: With dead ends: 94 [2020-09-11 16:17:07,999 INFO L226 Difference]: Without dead ends: 88 [2020-09-11 16:17:08,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 16:17:08,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-11 16:17:08,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-09-11 16:17:08,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:17:08,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 16:17:08,003 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-09-11 16:17:08,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:08,004 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 16:17:08,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:08,004 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 16:17:08,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:08,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:08,005 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:08,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:08,206 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:08,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:08,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-09-11 16:17:08,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:08,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130301795] [2020-09-11 16:17:08,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:08,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130301795] [2020-09-11 16:17:08,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49559621] [2020-09-11 16:17:08,404 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 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 16:17:08,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 16:17:08,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:08,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:08,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:08,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:08,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:08,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175369400] [2020-09-11 16:17:08,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:08,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:08,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:08,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:08,502 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-09-11 16:17:09,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:09,036 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-09-11 16:17:09,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:17:09,037 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:09,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:09,038 INFO L225 Difference]: With dead ends: 95 [2020-09-11 16:17:09,038 INFO L226 Difference]: Without dead ends: 89 [2020-09-11 16:17:09,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:17:09,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-11 16:17:09,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-09-11 16:17:09,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-11 16:17:09,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-09-11 16:17:09,040 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-09-11 16:17:09,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:09,041 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-09-11 16:17:09,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:09,041 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-09-11 16:17:09,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:09,041 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:09,041 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:09,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-11 16:17:09,242 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:09,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:09,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-09-11 16:17:09,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:09,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793294760] [2020-09-11 16:17:09,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:09,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793294760] [2020-09-11 16:17:09,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287536438] [2020-09-11 16:17:09,416 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 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 16:17:09,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 16:17:09,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:09,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:09,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:09,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:09,534 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:09,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:09,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:09,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472393209] [2020-09-11 16:17:09,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:09,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:09,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:09,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:09,536 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-09-11 16:17:10,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:10,242 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-09-11 16:17:10,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:17:10,243 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:10,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:10,244 INFO L225 Difference]: With dead ends: 92 [2020-09-11 16:17:10,244 INFO L226 Difference]: Without dead ends: 86 [2020-09-11 16:17:10,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:17:10,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-11 16:17:10,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-09-11 16:17:10,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 16:17:10,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-11 16:17:10,246 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-09-11 16:17:10,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:10,247 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-11 16:17:10,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:10,247 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-11 16:17:10,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:10,247 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:10,247 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:10,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:10,456 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:10,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:10,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-09-11 16:17:10,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:10,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181595615] [2020-09-11 16:17:10,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:10,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181595615] [2020-09-11 16:17:10,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972585592] [2020-09-11 16:17:10,602 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 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 16:17:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:10,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:17:10,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:10,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:10,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 16:17:10,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260777537] [2020-09-11 16:17:10,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:17:10,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:10,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:17:10,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:17:10,714 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-09-11 16:17:11,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:11,330 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-09-11 16:17:11,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:11,331 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 16:17:11,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:11,331 INFO L225 Difference]: With dead ends: 112 [2020-09-11 16:17:11,332 INFO L226 Difference]: Without dead ends: 106 [2020-09-11 16:17:11,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:17:11,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-11 16:17:11,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-09-11 16:17:11,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:17:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-09-11 16:17:11,335 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-09-11 16:17:11,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:11,335 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-09-11 16:17:11,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:17:11,335 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-09-11 16:17:11,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:17:11,336 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:11,336 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:11,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:11,546 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:11,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:11,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-09-11 16:17:11,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:11,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710030424] [2020-09-11 16:17:11,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:11,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:11,686 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:11,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710030424] [2020-09-11 16:17:11,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109603680] [2020-09-11 16:17:11,687 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 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 16:17:11,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:11,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:11,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:11,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:11,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:11,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:17:11,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215075890] [2020-09-11 16:17:11,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:11,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:11,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:11,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:11,793 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-09-11 16:17:12,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:12,549 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-09-11 16:17:12,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:17:12,550 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 16:17:12,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:12,551 INFO L225 Difference]: With dead ends: 93 [2020-09-11 16:17:12,551 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 16:17:12,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:17:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 16:17:12,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-09-11 16:17:12,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-11 16:17:12,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-09-11 16:17:12,554 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-09-11 16:17:12,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:12,554 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-09-11 16:17:12,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:12,554 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-09-11 16:17:12,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:12,554 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:12,554 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:12,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:12,755 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:12,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:12,756 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-09-11 16:17:12,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:12,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980664349] [2020-09-11 16:17:12,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:12,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980664349] [2020-09-11 16:17:12,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920184010] [2020-09-11 16:17:12,964 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 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 16:17:13,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 16:17:13,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:13,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:13,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:13,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:13,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:13,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153108466] [2020-09-11 16:17:13,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:13,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:13,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:13,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:13,048 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-09-11 16:17:13,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:13,445 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-09-11 16:17:13,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:17:13,446 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:13,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:13,447 INFO L225 Difference]: With dead ends: 104 [2020-09-11 16:17:13,447 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 16:17:13,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:17:13,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 16:17:13,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-09-11 16:17:13,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:13,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:13,451 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 16:17:13,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:13,451 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:13,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:13,452 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:13,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:13,452 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:13,452 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:13,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:13,662 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:13,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:13,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-09-11 16:17:13,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:13,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126783864] [2020-09-11 16:17:13,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:13,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:13,888 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:13,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126783864] [2020-09-11 16:17:13,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122742337] [2020-09-11 16:17:13,889 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 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 16:17:13,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:13,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:13,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:13,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:13,974 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:13,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:13,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:13,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829468412] [2020-09-11 16:17:13,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:13,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:13,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:13,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:13,988 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 16:17:14,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:14,385 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-09-11 16:17:14,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:17:14,386 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:14,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:14,386 INFO L225 Difference]: With dead ends: 101 [2020-09-11 16:17:14,387 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 16:17:14,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:17:14,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 16:17:14,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-09-11 16:17:14,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:14,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:14,389 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 16:17:14,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:14,389 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:14,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:14,390 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:14,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:14,390 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:14,390 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:14,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:14,591 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:14,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:14,591 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-09-11 16:17:14,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:14,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640085690] [2020-09-11 16:17:14,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:14,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640085690] [2020-09-11 16:17:14,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050437810] [2020-09-11 16:17:14,773 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 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 16:17:14,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 16:17:14,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:14,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:14,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:14,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:14,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:14,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56231261] [2020-09-11 16:17:14,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:14,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:14,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:14,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:14,843 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 16:17:15,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:15,364 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-09-11 16:17:15,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:17:15,365 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:15,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:15,367 INFO L225 Difference]: With dead ends: 98 [2020-09-11 16:17:15,367 INFO L226 Difference]: Without dead ends: 92 [2020-09-11 16:17:15,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:17:15,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-11 16:17:15,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-09-11 16:17:15,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:15,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:15,371 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 16:17:15,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:15,371 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:15,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:15,371 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:15,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:15,372 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:15,372 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:15,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:15,573 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:15,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:15,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-09-11 16:17:15,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:15,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666909552] [2020-09-11 16:17:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:15,827 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:15,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666909552] [2020-09-11 16:17:15,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693845238] [2020-09-11 16:17:15,828 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 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 16:17:15,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 16:17:15,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:15,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:15,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:15,942 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:15,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:15,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:15,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895041734] [2020-09-11 16:17:15,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:15,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:15,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:15,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:15,964 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 16:17:16,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:16,581 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-09-11 16:17:16,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:17:16,582 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:16,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:16,583 INFO L225 Difference]: With dead ends: 97 [2020-09-11 16:17:16,583 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 16:17:16,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 16:17:16,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 16:17:16,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-09-11 16:17:16,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:16,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:16,586 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 16:17:16,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:16,587 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:16,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:16,587 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:16,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:16,587 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:16,587 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:16,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:16,796 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:16,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:16,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-09-11 16:17:16,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:16,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118987609] [2020-09-11 16:17:16,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:17,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118987609] [2020-09-11 16:17:17,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109977993] [2020-09-11 16:17:17,002 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 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 16:17:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:17,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:17,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:17,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:17,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:17,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624134251] [2020-09-11 16:17:17,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:17,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:17,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:17,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:17,084 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 16:17:17,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:17,593 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-09-11 16:17:17,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:17:17,594 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:17,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:17,595 INFO L225 Difference]: With dead ends: 94 [2020-09-11 16:17:17,595 INFO L226 Difference]: Without dead ends: 88 [2020-09-11 16:17:17,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:17:17,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-11 16:17:17,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-09-11 16:17:17,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:17,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:17,599 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 16:17:17,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:17,599 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:17,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:17,599 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:17,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:17,600 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:17,600 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:17,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-09-11 16:17:17,801 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:17,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:17,801 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-09-11 16:17:17,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:17,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458939297] [2020-09-11 16:17:17,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:18,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458939297] [2020-09-11 16:17:18,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390788919] [2020-09-11 16:17:18,000 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 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 16:17:18,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:18,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:18,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:18,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:18,074 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:18,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:18,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:18,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658771779] [2020-09-11 16:17:18,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:18,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:18,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:18,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:18,089 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 16:17:18,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:18,743 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-09-11 16:17:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:17:18,743 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:18,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:18,744 INFO L225 Difference]: With dead ends: 93 [2020-09-11 16:17:18,745 INFO L226 Difference]: Without dead ends: 87 [2020-09-11 16:17:18,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:17:18,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-11 16:17:18,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-09-11 16:17:18,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:18,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:18,748 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 16:17:18,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:18,748 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:18,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:18,748 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:18,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:18,748 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:18,748 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:18,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:18,949 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:18,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:18,950 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-09-11 16:17:18,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:18,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94749001] [2020-09-11 16:17:18,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:19,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94749001] [2020-09-11 16:17:19,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767410355] [2020-09-11 16:17:19,120 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 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 16:17:19,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 16:17:19,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:19,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:19,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:19,231 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:19,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:19,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:19,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702730671] [2020-09-11 16:17:19,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:19,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:19,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:19,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:19,233 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 16:17:19,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:19,914 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-09-11 16:17:19,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:17:19,915 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:19,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:19,916 INFO L225 Difference]: With dead ends: 90 [2020-09-11 16:17:19,917 INFO L226 Difference]: Without dead ends: 84 [2020-09-11 16:17:19,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 16:17:19,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-11 16:17:19,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-09-11 16:17:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:19,921 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 16:17:19,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:19,921 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:19,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:19,922 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:19,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:19,923 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:19,923 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:20,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-11 16:17:20,133 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:20,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:20,134 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-09-11 16:17:20,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:20,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771232471] [2020-09-11 16:17:20,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:20,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771232471] [2020-09-11 16:17:20,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934717761] [2020-09-11 16:17:20,318 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 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 16:17:20,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:20,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:20,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:20,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:20,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:20,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:20,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:20,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632698128] [2020-09-11 16:17:20,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:20,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:20,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:20,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:20,407 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 16:17:21,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:21,122 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-11 16:17:21,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:17:21,122 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:21,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:21,123 INFO L225 Difference]: With dead ends: 89 [2020-09-11 16:17:21,124 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 16:17:21,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:17:21,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 16:17:21,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-09-11 16:17:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:21,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:21,126 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 16:17:21,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:21,127 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:21,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:21,127 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:21,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:21,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:21,127 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:21,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:21,328 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:21,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:21,329 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-09-11 16:17:21,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:21,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496743218] [2020-09-11 16:17:21,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:21,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496743218] [2020-09-11 16:17:21,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808684016] [2020-09-11 16:17:21,516 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 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 16:17:21,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 16:17:21,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:21,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:21,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:21,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:21,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:21,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376952922] [2020-09-11 16:17:21,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:21,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:21,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:21,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:21,608 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 16:17:22,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:22,238 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-09-11 16:17:22,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:17:22,239 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:22,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:22,240 INFO L225 Difference]: With dead ends: 86 [2020-09-11 16:17:22,240 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 16:17:22,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:17:22,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 16:17:22,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-09-11 16:17:22,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:22,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:22,244 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 16:17:22,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:22,245 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:22,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:22,245 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:22,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:22,245 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:22,245 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:22,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:22,456 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:22,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:22,457 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-09-11 16:17:22,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:22,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263150142] [2020-09-11 16:17:22,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:22,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263150142] [2020-09-11 16:17:22,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132672261] [2020-09-11 16:17:22,683 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 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 16:17:22,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 16:17:22,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:22,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:22,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:22,799 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:22,818 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:22,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:22,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:22,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755529832] [2020-09-11 16:17:22,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:22,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:22,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:22,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:22,820 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 16:17:23,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:23,627 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-09-11 16:17:23,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:17:23,628 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:23,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:23,629 INFO L225 Difference]: With dead ends: 85 [2020-09-11 16:17:23,630 INFO L226 Difference]: Without dead ends: 79 [2020-09-11 16:17:23,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:17:23,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-11 16:17:23,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-09-11 16:17:23,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:23,634 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 16:17:23,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:23,634 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:23,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:23,635 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:23,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:23,635 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:23,635 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:23,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:23,836 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:23,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:23,837 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-09-11 16:17:23,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:23,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083686448] [2020-09-11 16:17:23,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:24,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083686448] [2020-09-11 16:17:24,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952199490] [2020-09-11 16:17:24,020 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 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 16:17:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:24,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:24,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:24,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:24,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 16:17:24,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044793745] [2020-09-11 16:17:24,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:17:24,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:24,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:17:24,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:17:24,097 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 16:17:24,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:24,719 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-11 16:17:24,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:24,720 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 16:17:24,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:24,721 INFO L225 Difference]: With dead ends: 101 [2020-09-11 16:17:24,721 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 16:17:24,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:17:24,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 16:17:24,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-09-11 16:17:24,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 16:17:24,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-09-11 16:17:24,725 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-09-11 16:17:24,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:24,725 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-09-11 16:17:24,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:17:24,725 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-09-11 16:17:24,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:24,726 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:24,726 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:24,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:24,927 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:24,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:24,927 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-09-11 16:17:24,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:24,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951378156] [2020-09-11 16:17:24,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:25,108 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:25,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951378156] [2020-09-11 16:17:25,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816837121] [2020-09-11 16:17:25,109 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 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 16:17:25,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:25,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:25,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:25,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:25,201 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:25,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:25,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:25,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780850754] [2020-09-11 16:17:25,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:25,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:25,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:25,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:25,222 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-09-11 16:17:26,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:26,136 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-09-11 16:17:26,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:17:26,136 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:26,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:26,137 INFO L225 Difference]: With dead ends: 82 [2020-09-11 16:17:26,138 INFO L226 Difference]: Without dead ends: 74 [2020-09-11 16:17:26,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:17:26,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-11 16:17:26,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-09-11 16:17:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-11 16:17:26,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-09-11 16:17:26,140 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-09-11 16:17:26,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:26,141 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-09-11 16:17:26,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:26,141 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-09-11 16:17:26,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 16:17:26,141 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:26,141 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:26,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:26,349 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:26,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:26,350 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-09-11 16:17:26,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:26,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850754589] [2020-09-11 16:17:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:26,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850754589] [2020-09-11 16:17:26,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001268587] [2020-09-11 16:17:26,536 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 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 16:17:26,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 16:17:26,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:26,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:17:26,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:26,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:17:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:26,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:26,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:17:26,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193657658] [2020-09-11 16:17:26,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:26,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:26,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:26,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:26,647 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-09-11 16:17:27,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:27,490 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-11 16:17:27,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:27,490 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 16:17:27,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:27,491 INFO L225 Difference]: With dead ends: 92 [2020-09-11 16:17:27,492 INFO L226 Difference]: Without dead ends: 87 [2020-09-11 16:17:27,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:17:27,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-11 16:17:27,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-09-11 16:17:27,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:17:27,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-11 16:17:27,495 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-09-11 16:17:27,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:27,495 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-11 16:17:27,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:27,496 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-11 16:17:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:27,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:27,496 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:27,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:27,697 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:27,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:27,698 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-09-11 16:17:27,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:27,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450422078] [2020-09-11 16:17:27,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:27,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450422078] [2020-09-11 16:17:27,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903022961] [2020-09-11 16:17:27,902 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 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 16:17:27,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:27,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:27,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:27,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:27,988 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:17:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:28,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:28,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:28,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521011987] [2020-09-11 16:17:28,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:28,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:28,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:28,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:28,010 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-09-11 16:17:28,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:28,934 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-09-11 16:17:28,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:28,935 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:28,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:28,936 INFO L225 Difference]: With dead ends: 78 [2020-09-11 16:17:28,936 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 16:17:28,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:17:28,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 16:17:28,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-09-11 16:17:28,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 16:17:28,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-11 16:17:28,938 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-09-11 16:17:28,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:28,939 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-11 16:17:28,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:28,939 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-11 16:17:28,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:28,939 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:28,939 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:29,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-09-11 16:17:29,143 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:29,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:29,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-09-11 16:17:29,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:29,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398051572] [2020-09-11 16:17:29,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:29,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398051572] [2020-09-11 16:17:29,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174191061] [2020-09-11 16:17:29,400 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 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 16:17:29,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 16:17:29,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:29,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:29,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:29,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:29,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:29,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885482901] [2020-09-11 16:17:29,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:29,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:29,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:29,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:29,476 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-09-11 16:17:29,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:29,868 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-11 16:17:29,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:17:29,869 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:29,870 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:17:29,871 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 16:17:29,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-09-11 16:17:29,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 16:17:29,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-09-11 16:17:29,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:17:29,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-09-11 16:17:29,874 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-09-11 16:17:29,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:29,874 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-09-11 16:17:29,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:29,874 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-09-11 16:17:29,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:29,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:29,875 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:30,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:30,080 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:30,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:30,081 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-09-11 16:17:30,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:30,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364267119] [2020-09-11 16:17:30,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:30,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364267119] [2020-09-11 16:17:30,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042325760] [2020-09-11 16:17:30,325 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 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 16:17:30,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 16:17:30,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:30,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:30,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:30,410 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:30,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:30,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:30,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538797075] [2020-09-11 16:17:30,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:30,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:30,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:30,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:30,425 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-09-11 16:17:30,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:30,884 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-09-11 16:17:30,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:17:30,885 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:30,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:30,886 INFO L225 Difference]: With dead ends: 98 [2020-09-11 16:17:30,886 INFO L226 Difference]: Without dead ends: 92 [2020-09-11 16:17:30,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:17:30,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-11 16:17:30,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-09-11 16:17:30,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 16:17:30,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-09-11 16:17:30,889 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-09-11 16:17:30,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:30,889 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-09-11 16:17:30,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:30,889 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-09-11 16:17:30,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:30,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:30,890 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:31,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-09-11 16:17:31,098 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:31,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:31,099 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-09-11 16:17:31,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:31,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382539243] [2020-09-11 16:17:31,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:31,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382539243] [2020-09-11 16:17:31,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686327018] [2020-09-11 16:17:31,345 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 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 16:17:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:31,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:31,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:31,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:31,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:31,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923910377] [2020-09-11 16:17:31,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:31,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:31,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:31,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:31,421 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-09-11 16:17:31,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:31,924 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-11 16:17:31,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:17:31,925 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:31,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:31,926 INFO L225 Difference]: With dead ends: 99 [2020-09-11 16:17:31,926 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 16:17:31,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:17:31,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 16:17:31,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-09-11 16:17:31,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 16:17:31,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-09-11 16:17:31,930 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-09-11 16:17:31,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:31,930 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-09-11 16:17:31,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:31,930 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-09-11 16:17:31,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:31,930 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:31,930 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:32,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:32,131 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:32,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:32,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-09-11 16:17:32,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:32,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266853307] [2020-09-11 16:17:32,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:32,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266853307] [2020-09-11 16:17:32,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051898292] [2020-09-11 16:17:32,380 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 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 16:17:32,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:32,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:32,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:32,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:32,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:32,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:32,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:32,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121939852] [2020-09-11 16:17:32,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:32,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:32,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:32,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:32,482 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-09-11 16:17:33,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:33,037 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-09-11 16:17:33,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:17:33,037 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:33,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:33,039 INFO L225 Difference]: With dead ends: 109 [2020-09-11 16:17:33,039 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 16:17:33,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 16:17:33,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 16:17:33,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-09-11 16:17:33,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:17:33,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-09-11 16:17:33,045 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-09-11 16:17:33,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:33,045 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-09-11 16:17:33,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:33,045 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-09-11 16:17:33,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:33,046 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:33,046 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:33,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:33,255 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:33,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:33,256 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-09-11 16:17:33,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:33,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049773123] [2020-09-11 16:17:33,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:33,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049773123] [2020-09-11 16:17:33,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690396853] [2020-09-11 16:17:33,485 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 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 16:17:33,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 16:17:33,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:33,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:33,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:33,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:33,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:33,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052649011] [2020-09-11 16:17:33,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:33,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:33,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:33,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:33,567 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-09-11 16:17:34,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:34,096 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-09-11 16:17:34,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:17:34,097 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:34,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:34,098 INFO L225 Difference]: With dead ends: 109 [2020-09-11 16:17:34,098 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 16:17:34,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:17:34,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 16:17:34,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-09-11 16:17:34,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-11 16:17:34,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-09-11 16:17:34,102 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-09-11 16:17:34,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:34,102 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-09-11 16:17:34,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:34,102 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-09-11 16:17:34,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:34,103 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:34,103 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:34,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-11 16:17:34,313 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:34,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:34,314 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-09-11 16:17:34,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:34,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765954888] [2020-09-11 16:17:34,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:34,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765954888] [2020-09-11 16:17:34,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804343890] [2020-09-11 16:17:34,545 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 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 16:17:34,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:34,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:34,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:34,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:34,627 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:34,641 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:34,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:34,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:34,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986476060] [2020-09-11 16:17:34,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:34,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:34,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:34,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:34,643 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-09-11 16:17:35,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:35,298 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-09-11 16:17:35,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:17:35,299 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:35,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:35,300 INFO L225 Difference]: With dead ends: 106 [2020-09-11 16:17:35,300 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 16:17:35,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:17:35,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 16:17:35,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-11 16:17:35,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 16:17:35,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-09-11 16:17:35,304 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-09-11 16:17:35,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:35,305 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-09-11 16:17:35,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:35,305 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-09-11 16:17:35,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:35,305 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:35,306 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:35,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-11 16:17:35,515 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:35,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:35,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-09-11 16:17:35,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:35,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152174675] [2020-09-11 16:17:35,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:35,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152174675] [2020-09-11 16:17:35,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869491352] [2020-09-11 16:17:35,722 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 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 16:17:35,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 16:17:35,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:35,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:35,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:35,803 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:35,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:35,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:35,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918437136] [2020-09-11 16:17:35,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:35,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:35,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:35,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:35,804 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-09-11 16:17:36,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:36,410 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-09-11 16:17:36,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:17:36,414 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:36,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:36,415 INFO L225 Difference]: With dead ends: 107 [2020-09-11 16:17:36,415 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:17:36,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:17:36,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:17:36,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-11 16:17:36,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-11 16:17:36,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-09-11 16:17:36,418 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-09-11 16:17:36,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:36,418 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-09-11 16:17:36,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:36,418 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-09-11 16:17:36,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:36,419 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:36,419 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:36,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:36,623 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:36,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:36,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-09-11 16:17:36,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:36,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042725472] [2020-09-11 16:17:36,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:36,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042725472] [2020-09-11 16:17:36,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859687943] [2020-09-11 16:17:36,852 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 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 16:17:36,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 16:17:36,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:36,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:36,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:36,937 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:36,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:36,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:36,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932257371] [2020-09-11 16:17:36,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:36,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:36,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:36,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:36,956 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-09-11 16:17:37,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:37,715 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-09-11 16:17:37,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:17:37,716 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:37,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:37,716 INFO L225 Difference]: With dead ends: 104 [2020-09-11 16:17:37,717 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 16:17:37,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:17:37,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 16:17:37,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-09-11 16:17:37,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 16:17:37,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-09-11 16:17:37,721 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-09-11 16:17:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:37,721 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-09-11 16:17:37,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:37,721 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-09-11 16:17:37,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:37,722 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:37,722 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:37,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-11 16:17:37,931 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:37,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:37,932 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-09-11 16:17:37,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:37,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440215068] [2020-09-11 16:17:37,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:38,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440215068] [2020-09-11 16:17:38,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594245140] [2020-09-11 16:17:38,137 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 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 16:17:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:38,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:38,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:38,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:38,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:38,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788425333] [2020-09-11 16:17:38,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:38,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:38,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:38,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:38,228 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-09-11 16:17:38,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:38,892 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-09-11 16:17:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:38,893 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:38,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:38,894 INFO L225 Difference]: With dead ends: 105 [2020-09-11 16:17:38,894 INFO L226 Difference]: Without dead ends: 99 [2020-09-11 16:17:38,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:17:38,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-11 16:17:38,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-09-11 16:17:38,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:17:38,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 16:17:38,898 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-09-11 16:17:38,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:38,898 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 16:17:38,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:38,898 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 16:17:38,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:38,899 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:38,899 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:39,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:39,102 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:39,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:39,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-09-11 16:17:39,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:39,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297512317] [2020-09-11 16:17:39,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:39,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297512317] [2020-09-11 16:17:39,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205654655] [2020-09-11 16:17:39,314 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 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 16:17:39,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:39,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:39,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:39,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:39,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:39,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:39,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:39,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646778629] [2020-09-11 16:17:39,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:39,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:39,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:39,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:39,411 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-09-11 16:17:40,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:40,186 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-09-11 16:17:40,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:17:40,187 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:40,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:40,187 INFO L225 Difference]: With dead ends: 102 [2020-09-11 16:17:40,188 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 16:17:40,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:17:40,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 16:17:40,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-09-11 16:17:40,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:17:40,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 16:17:40,190 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-09-11 16:17:40,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:40,190 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 16:17:40,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:40,191 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 16:17:40,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:40,191 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:40,191 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:40,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-11 16:17:40,392 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:40,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:40,392 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-09-11 16:17:40,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:40,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92906791] [2020-09-11 16:17:40,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:40,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:40,593 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:40,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92906791] [2020-09-11 16:17:40,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589108998] [2020-09-11 16:17:40,594 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 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 16:17:40,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 16:17:40,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:40,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:40,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:40,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:40,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:40,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130112245] [2020-09-11 16:17:40,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:40,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:40,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:40,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:40,679 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-09-11 16:17:41,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:41,427 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-09-11 16:17:41,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:17:41,428 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:41,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:41,429 INFO L225 Difference]: With dead ends: 103 [2020-09-11 16:17:41,430 INFO L226 Difference]: Without dead ends: 97 [2020-09-11 16:17:41,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:17:41,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-11 16:17:41,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-09-11 16:17:41,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 16:17:41,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-09-11 16:17:41,433 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-09-11 16:17:41,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:41,433 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-09-11 16:17:41,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:41,433 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-09-11 16:17:41,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:41,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:41,434 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:41,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:41,636 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:41,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:41,637 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-09-11 16:17:41,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:41,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058973786] [2020-09-11 16:17:41,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:41,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058973786] [2020-09-11 16:17:41,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701101365] [2020-09-11 16:17:41,842 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 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 16:17:41,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:41,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:41,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:41,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:41,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:41,945 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:41,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:41,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:41,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074920982] [2020-09-11 16:17:41,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:41,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:41,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:41,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:41,947 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-09-11 16:17:42,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:42,867 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-09-11 16:17:42,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:17:42,868 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:42,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:42,868 INFO L225 Difference]: With dead ends: 100 [2020-09-11 16:17:42,869 INFO L226 Difference]: Without dead ends: 94 [2020-09-11 16:17:42,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:17:42,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-11 16:17:42,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-09-11 16:17:42,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:17:42,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-11 16:17:42,872 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-09-11 16:17:42,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:42,872 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-11 16:17:42,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:42,872 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-11 16:17:42,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:42,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:42,873 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:43,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-11 16:17:43,081 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:43,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:43,082 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-09-11 16:17:43,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:43,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836854129] [2020-09-11 16:17:43,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:43,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836854129] [2020-09-11 16:17:43,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149258386] [2020-09-11 16:17:43,265 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 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 16:17:43,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 16:17:43,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:43,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:43,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:43,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:43,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 16:17:43,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515091661] [2020-09-11 16:17:43,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:17:43,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:43,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:17:43,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:17:43,372 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-09-11 16:17:44,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:44,158 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-11 16:17:44,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:17:44,159 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 16:17:44,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:44,159 INFO L225 Difference]: With dead ends: 120 [2020-09-11 16:17:44,159 INFO L226 Difference]: Without dead ends: 114 [2020-09-11 16:17:44,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:17:44,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-11 16:17:44,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-09-11 16:17:44,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 16:17:44,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-09-11 16:17:44,162 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-09-11 16:17:44,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:44,162 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-09-11 16:17:44,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:17:44,163 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-09-11 16:17:44,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 16:17:44,164 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:44,164 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:44,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-11 16:17:44,365 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:44,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:44,365 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-09-11 16:17:44,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:44,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226570182] [2020-09-11 16:17:44,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:44,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226570182] [2020-09-11 16:17:44,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454486024] [2020-09-11 16:17:44,567 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 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 16:17:44,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 16:17:44,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:44,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:17:44,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:44,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:44,674 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:44,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:44,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:17:44,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752870122] [2020-09-11 16:17:44,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:44,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:44,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:44,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:44,676 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-09-11 16:17:45,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:45,656 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-09-11 16:17:45,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:17:45,657 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 16:17:45,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:45,657 INFO L225 Difference]: With dead ends: 101 [2020-09-11 16:17:45,657 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 16:17:45,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:17:45,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 16:17:45,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-09-11 16:17:45,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-11 16:17:45,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-09-11 16:17:45,659 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-09-11 16:17:45,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:45,659 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-09-11 16:17:45,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:45,660 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-09-11 16:17:45,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:45,660 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:45,660 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:45,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:45,861 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:45,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:45,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-09-11 16:17:45,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:45,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258764432] [2020-09-11 16:17:45,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:46,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258764432] [2020-09-11 16:17:46,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643761710] [2020-09-11 16:17:46,151 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 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 16:17:46,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:46,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:46,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:46,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:46,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:46,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851931708] [2020-09-11 16:17:46,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:46,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:46,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:46,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:46,226 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-09-11 16:17:46,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:46,700 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-09-11 16:17:46,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:17:46,701 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:46,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:46,701 INFO L225 Difference]: With dead ends: 114 [2020-09-11 16:17:46,701 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 16:17:46,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 16:17:46,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 16:17:46,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-09-11 16:17:46,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:46,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:46,704 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:46,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:46,704 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:46,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:46,704 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:46,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:46,705 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:46,705 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:46,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:46,909 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:46,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:46,910 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-09-11 16:17:46,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:46,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447195809] [2020-09-11 16:17:46,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:47,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447195809] [2020-09-11 16:17:47,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557973921] [2020-09-11 16:17:47,203 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 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 16:17:47,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:47,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:47,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:47,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:47,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:47,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:47,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:17:47,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714417583] [2020-09-11 16:17:47,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:17:47,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:47,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:17:47,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:17:47,307 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:17:47,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:47,880 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-09-11 16:17:47,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:17:47,881 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:17:47,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:47,881 INFO L225 Difference]: With dead ends: 111 [2020-09-11 16:17:47,882 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 16:17:47,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:17:47,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 16:17:47,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-09-11 16:17:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:17:47,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:17:47,884 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:17:47,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:47,885 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:17:47,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:17:47,885 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:17:47,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:47,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:47,885 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:48,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-11 16:17:48,086 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:48,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:48,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-09-11 16:17:48,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:48,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504003737] [2020-09-11 16:17:48,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:48,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504003737] [2020-09-11 16:17:48,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410594479] [2020-09-11 16:17:48,356 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 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 16:17:48,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 16:17:48,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:48,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:48,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:48,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:48,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:48,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876975295] [2020-09-11 16:17:48,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:48,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:48,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:48,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:48,438 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:17:48,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:48,966 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-11 16:17:48,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:17:48,967 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:48,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:48,967 INFO L225 Difference]: With dead ends: 108 [2020-09-11 16:17:48,967 INFO L226 Difference]: Without dead ends: 102 [2020-09-11 16:17:48,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 16:17:48,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-11 16:17:48,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-09-11 16:17:48,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:48,970 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:48,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:48,971 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:48,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:48,971 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:48,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:48,973 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:48,973 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:49,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:49,176 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:49,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:49,177 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-09-11 16:17:49,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:49,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889156908] [2020-09-11 16:17:49,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:49,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889156908] [2020-09-11 16:17:49,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872914351] [2020-09-11 16:17:49,460 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 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 16:17:49,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:49,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:49,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:49,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:49,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:49,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:49,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:17:49,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057810691] [2020-09-11 16:17:49,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:17:49,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:49,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:17:49,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:17:49,559 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:17:50,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:50,237 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-09-11 16:17:50,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:17:50,237 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:17:50,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:50,238 INFO L225 Difference]: With dead ends: 107 [2020-09-11 16:17:50,238 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:17:50,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:17:50,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:17:50,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-09-11 16:17:50,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:17:50,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:17:50,241 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:17:50,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:50,241 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:17:50,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:17:50,242 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:17:50,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:50,242 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:50,242 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:50,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-11 16:17:50,443 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:50,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:50,443 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-09-11 16:17:50,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:50,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394477215] [2020-09-11 16:17:50,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:50,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394477215] [2020-09-11 16:17:50,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542746073] [2020-09-11 16:17:50,694 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 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 16:17:50,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 16:17:50,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:50,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:50,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:50,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:50,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:50,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964428096] [2020-09-11 16:17:50,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:50,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:50,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:50,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:50,776 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:17:51,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:51,397 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-11 16:17:51,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:17:51,398 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:51,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:51,398 INFO L225 Difference]: With dead ends: 104 [2020-09-11 16:17:51,399 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 16:17:51,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:17:51,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 16:17:51,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-09-11 16:17:51,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:51,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:51,402 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:51,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:51,402 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:51,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:51,402 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:51,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:51,402 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:51,402 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:51,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-11 16:17:51,603 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:51,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:51,604 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-09-11 16:17:51,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:51,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459410792] [2020-09-11 16:17:51,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:51,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459410792] [2020-09-11 16:17:51,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905078427] [2020-09-11 16:17:51,865 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 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 16:17:51,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 16:17:51,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:51,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:51,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:51,987 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:51,999 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:52,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:52,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:17:52,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190369870] [2020-09-11 16:17:52,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:17:52,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:52,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:17:52,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:17:52,003 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:17:52,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:52,776 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-09-11 16:17:52,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:17:52,777 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:17:52,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:52,777 INFO L225 Difference]: With dead ends: 103 [2020-09-11 16:17:52,778 INFO L226 Difference]: Without dead ends: 97 [2020-09-11 16:17:52,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:17:52,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-11 16:17:52,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-09-11 16:17:52,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:17:52,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:17:52,786 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:17:52,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:52,786 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:17:52,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:17:52,786 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:17:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:52,786 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:52,787 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:52,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-11 16:17:52,988 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:52,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:52,988 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-09-11 16:17:52,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:52,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781750682] [2020-09-11 16:17:52,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:53,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781750682] [2020-09-11 16:17:53,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909933480] [2020-09-11 16:17:53,232 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 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 16:17:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:53,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:53,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:53,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:53,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:53,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230276823] [2020-09-11 16:17:53,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:53,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:53,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:53,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:53,311 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:17:53,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:53,984 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-09-11 16:17:53,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:17:53,985 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:53,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:53,986 INFO L225 Difference]: With dead ends: 100 [2020-09-11 16:17:53,986 INFO L226 Difference]: Without dead ends: 94 [2020-09-11 16:17:53,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:17:53,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-11 16:17:53,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-09-11 16:17:53,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:53,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:53,989 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:53,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:53,989 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:53,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:53,989 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:53,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:53,989 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:53,990 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:54,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:54,198 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:54,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:54,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-09-11 16:17:54,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:54,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928610315] [2020-09-11 16:17:54,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:54,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928610315] [2020-09-11 16:17:54,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637021189] [2020-09-11 16:17:54,448 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 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 16:17:54,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:17:54,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:54,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:54,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:54,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:54,559 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:54,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:54,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:17:54,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401847839] [2020-09-11 16:17:54,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:17:54,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:54,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:17:54,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:17:54,561 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:17:55,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:55,435 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-09-11 16:17:55,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:17:55,436 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:17:55,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:55,437 INFO L225 Difference]: With dead ends: 99 [2020-09-11 16:17:55,437 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 16:17:55,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:17:55,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 16:17:55,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-09-11 16:17:55,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:17:55,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:17:55,439 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:17:55,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:55,439 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:17:55,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:17:55,440 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:17:55,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:55,440 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:55,440 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:55,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-11 16:17:55,641 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:55,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:55,641 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-09-11 16:17:55,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:55,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209669008] [2020-09-11 16:17:55,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:55,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209669008] [2020-09-11 16:17:55,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356415510] [2020-09-11 16:17:55,882 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 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 16:17:55,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 16:17:55,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:55,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:55,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:55,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:55,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:55,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743316509] [2020-09-11 16:17:55,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:55,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:55,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:55,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:55,966 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:17:56,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:56,713 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-09-11 16:17:56,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:17:56,714 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:56,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:56,715 INFO L225 Difference]: With dead ends: 96 [2020-09-11 16:17:56,715 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 16:17:56,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:17:56,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 16:17:56,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-09-11 16:17:56,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:56,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:56,718 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:56,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:56,719 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:56,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:56,719 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:56,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:56,719 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:56,720 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:56,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:56,923 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:56,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:56,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-09-11 16:17:56,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:56,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388343623] [2020-09-11 16:17:56,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:57,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388343623] [2020-09-11 16:17:57,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522962951] [2020-09-11 16:17:57,143 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 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 16:17:57,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:17:57,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:57,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:57,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:57,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:17:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:57,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:57,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:17:57,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392809724] [2020-09-11 16:17:57,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:17:57,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:57,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:17:57,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:17:57,247 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:17:58,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:58,230 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-11 16:17:58,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:17:58,231 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:17:58,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:58,232 INFO L225 Difference]: With dead ends: 95 [2020-09-11 16:17:58,232 INFO L226 Difference]: Without dead ends: 89 [2020-09-11 16:17:58,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:17:58,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-11 16:17:58,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-09-11 16:17:58,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:17:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:17:58,236 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:17:58,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:58,236 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:17:58,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:17:58,236 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:17:58,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:58,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:58,237 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:58,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:58,437 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:58,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:58,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-09-11 16:17:58,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:58,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994858943] [2020-09-11 16:17:58,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:58,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:17:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:58,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994858943] [2020-09-11 16:17:58,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756065557] [2020-09-11 16:17:58,657 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 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 16:17:58,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 16:17:58,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:17:58,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:17:58,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:17:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:17:58,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:17:58,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:17:58,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852367590] [2020-09-11 16:17:58,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:17:58,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:17:58,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:17:58,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:17:58,757 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:17:59,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:17:59,551 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-11 16:17:59,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:17:59,551 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:17:59,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:17:59,552 INFO L225 Difference]: With dead ends: 92 [2020-09-11 16:17:59,552 INFO L226 Difference]: Without dead ends: 86 [2020-09-11 16:17:59,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:17:59,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-11 16:17:59,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-09-11 16:17:59,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:17:59,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:17:59,555 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 16:17:59,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:17:59,558 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:17:59,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:17:59,558 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:17:59,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:17:59,559 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:17:59,560 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:17:59,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:17:59,768 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:17:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:17:59,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-09-11 16:17:59,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:17:59,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391277696] [2020-09-11 16:17:59,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:17:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:00,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391277696] [2020-09-11 16:18:00,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490781122] [2020-09-11 16:18:00,004 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 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 16:18:00,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 16:18:00,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:00,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:18:00,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:00,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:00,119 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:00,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:00,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:18:00,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15452776] [2020-09-11 16:18:00,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:00,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:00,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:00,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:00,120 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 16:18:01,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:01,229 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-09-11 16:18:01,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:18:01,230 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:18:01,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:01,231 INFO L225 Difference]: With dead ends: 91 [2020-09-11 16:18:01,231 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 16:18:01,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 16:18:01,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 16:18:01,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-09-11 16:18:01,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:18:01,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:18:01,234 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 16:18:01,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:01,234 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:18:01,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:01,234 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:18:01,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:18:01,234 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:01,234 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:01,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:01,435 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:01,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:01,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-09-11 16:18:01,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:01,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844360736] [2020-09-11 16:18:01,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:01,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844360736] [2020-09-11 16:18:01,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394668685] [2020-09-11 16:18:01,661 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 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 16:18:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:01,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:18:01,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:01,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:01,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 16:18:01,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454897470] [2020-09-11 16:18:01,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:18:01,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:01,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:18:01,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:18:01,746 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 16:18:02,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:02,636 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-11 16:18:02,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:18:02,636 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 16:18:02,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:02,637 INFO L225 Difference]: With dead ends: 107 [2020-09-11 16:18:02,637 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:18:02,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:18:02,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:18:02,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-09-11 16:18:02,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-11 16:18:02,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-09-11 16:18:02,641 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-09-11 16:18:02,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:02,641 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-09-11 16:18:02,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:18:02,641 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-09-11 16:18:02,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:18:02,641 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:02,641 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:02,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-11 16:18:02,842 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:02,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:02,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-09-11 16:18:02,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:02,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314787602] [2020-09-11 16:18:02,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:03,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314787602] [2020-09-11 16:18:03,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446041059] [2020-09-11 16:18:03,043 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 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 16:18:03,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:03,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:03,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:18:03,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:03,166 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:03,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:03,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:18:03,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420036988] [2020-09-11 16:18:03,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:03,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:03,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:03,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:03,192 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-09-11 16:18:04,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:04,356 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-09-11 16:18:04,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 16:18:04,357 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:18:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:04,358 INFO L225 Difference]: With dead ends: 88 [2020-09-11 16:18:04,358 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 16:18:04,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:18:04,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 16:18:04,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-09-11 16:18:04,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 16:18:04,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-09-11 16:18:04,361 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-09-11 16:18:04,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:04,361 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-09-11 16:18:04,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:04,361 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-09-11 16:18:04,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:18:04,362 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:04,362 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:04,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-11 16:18:04,563 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:04,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:04,563 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-09-11 16:18:04,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:04,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266703585] [2020-09-11 16:18:04,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:04,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:04,791 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:04,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266703585] [2020-09-11 16:18:04,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744682390] [2020-09-11 16:18:04,792 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 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 16:18:04,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 16:18:04,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:04,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:18:04,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:04,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:18:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:04,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:04,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:18:04,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095562127] [2020-09-11 16:18:04,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:04,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:04,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:04,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:04,914 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-09-11 16:18:05,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:05,965 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-09-11 16:18:05,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:18:05,966 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 16:18:05,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:05,966 INFO L225 Difference]: With dead ends: 100 [2020-09-11 16:18:05,967 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 16:18:05,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:18:05,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 16:18:05,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-09-11 16:18:05,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 16:18:05,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-11 16:18:05,969 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-09-11 16:18:05,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:05,969 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-11 16:18:05,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:05,969 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-11 16:18:05,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:05,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:05,970 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:06,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-11 16:18:06,171 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:06,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:06,172 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-09-11 16:18:06,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:06,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501290747] [2020-09-11 16:18:06,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:06,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501290747] [2020-09-11 16:18:06,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16425302] [2020-09-11 16:18:06,413 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 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 16:18:06,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:06,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:06,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:06,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:06,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:18:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:06,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:06,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:06,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435344862] [2020-09-11 16:18:06,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:06,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:06,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:06,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:06,524 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-09-11 16:18:07,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:07,660 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-09-11 16:18:07,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:18:07,661 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:07,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:07,662 INFO L225 Difference]: With dead ends: 84 [2020-09-11 16:18:07,662 INFO L226 Difference]: Without dead ends: 79 [2020-09-11 16:18:07,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 16:18:07,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-11 16:18:07,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-09-11 16:18:07,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 16:18:07,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-11 16:18:07,665 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-09-11 16:18:07,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:07,665 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-11 16:18:07,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:07,665 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-11 16:18:07,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:07,666 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:07,666 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:07,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-11 16:18:07,867 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:07,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:07,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-09-11 16:18:07,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:07,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377410362] [2020-09-11 16:18:07,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:08,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377410362] [2020-09-11 16:18:08,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981986972] [2020-09-11 16:18:08,192 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 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 16:18:08,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:08,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:08,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:08,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:08,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:08,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:08,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066976408] [2020-09-11 16:18:08,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:08,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:08,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:08,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:08,272 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-09-11 16:18:08,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:08,731 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-09-11 16:18:08,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:18:08,732 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:08,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:08,733 INFO L225 Difference]: With dead ends: 90 [2020-09-11 16:18:08,733 INFO L226 Difference]: Without dead ends: 84 [2020-09-11 16:18:08,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 16:18:08,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-11 16:18:08,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-09-11 16:18:08,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 16:18:08,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-09-11 16:18:08,735 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-09-11 16:18:08,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:08,735 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-09-11 16:18:08,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:08,735 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-09-11 16:18:08,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:08,735 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:08,736 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:08,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:08,939 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:08,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:08,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-09-11 16:18:08,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:08,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718150976] [2020-09-11 16:18:08,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:09,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718150976] [2020-09-11 16:18:09,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600389474] [2020-09-11 16:18:09,270 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 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 16:18:09,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:09,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:09,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:09,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:09,370 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:09,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:09,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:09,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677073690] [2020-09-11 16:18:09,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:09,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:09,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:09,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:09,383 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-09-11 16:18:09,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:09,941 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-09-11 16:18:09,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:18:09,942 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:09,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:09,943 INFO L225 Difference]: With dead ends: 106 [2020-09-11 16:18:09,943 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 16:18:09,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:18:09,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 16:18:09,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-11 16:18:09,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 16:18:09,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-09-11 16:18:09,946 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-09-11 16:18:09,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:09,946 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-09-11 16:18:09,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:09,947 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-09-11 16:18:09,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:09,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:09,947 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:10,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-11 16:18:10,150 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:10,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:10,150 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-09-11 16:18:10,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:10,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060537365] [2020-09-11 16:18:10,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:10,467 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:10,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060537365] [2020-09-11 16:18:10,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377158044] [2020-09-11 16:18:10,468 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 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 16:18:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:10,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:10,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:10,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:10,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:10,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397302281] [2020-09-11 16:18:10,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:10,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:10,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:10,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:10,545 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-09-11 16:18:11,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:11,183 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-09-11 16:18:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:18:11,184 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:11,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:11,185 INFO L225 Difference]: With dead ends: 107 [2020-09-11 16:18:11,185 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:18:11,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:18:11,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:18:11,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-11 16:18:11,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-11 16:18:11,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-09-11 16:18:11,188 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-09-11 16:18:11,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:11,189 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-09-11 16:18:11,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:11,189 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-09-11 16:18:11,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:11,189 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:11,189 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:11,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-11 16:18:11,397 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:11,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:11,398 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-09-11 16:18:11,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:11,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445637771] [2020-09-11 16:18:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:11,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445637771] [2020-09-11 16:18:11,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091733604] [2020-09-11 16:18:11,710 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 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 16:18:11,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:11,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:11,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:11,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:11,804 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:11,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:11,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:11,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964090126] [2020-09-11 16:18:11,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:11,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:11,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:11,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:11,820 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-09-11 16:18:12,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:12,439 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-09-11 16:18:12,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:18:12,440 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:12,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:12,440 INFO L225 Difference]: With dead ends: 119 [2020-09-11 16:18:12,440 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 16:18:12,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:18:12,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 16:18:12,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-09-11 16:18:12,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 16:18:12,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-09-11 16:18:12,443 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-09-11 16:18:12,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:12,444 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-09-11 16:18:12,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:12,444 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-09-11 16:18:12,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:12,444 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:12,444 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:12,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-11 16:18:12,645 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:12,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:12,646 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-09-11 16:18:12,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:12,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186168697] [2020-09-11 16:18:12,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:12,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186168697] [2020-09-11 16:18:12,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368213365] [2020-09-11 16:18:12,938 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 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 16:18:13,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 16:18:13,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:13,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:13,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:13,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:13,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:13,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874615184] [2020-09-11 16:18:13,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:13,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:13,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:13,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:13,025 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-09-11 16:18:13,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:13,700 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-09-11 16:18:13,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:18:13,701 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:13,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:13,702 INFO L225 Difference]: With dead ends: 119 [2020-09-11 16:18:13,702 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 16:18:13,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:18:13,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 16:18:13,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-09-11 16:18:13,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 16:18:13,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-09-11 16:18:13,706 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-09-11 16:18:13,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:13,706 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-09-11 16:18:13,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:13,706 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-09-11 16:18:13,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:13,707 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:13,707 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:13,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:13,917 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:13,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:13,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-09-11 16:18:13,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:13,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946271118] [2020-09-11 16:18:13,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:14,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946271118] [2020-09-11 16:18:14,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141233944] [2020-09-11 16:18:14,200 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 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 16:18:14,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:14,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:14,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:14,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:14,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:14,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:14,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:14,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062566227] [2020-09-11 16:18:14,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:14,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:14,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:14,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:14,309 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-09-11 16:18:15,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:15,089 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-09-11 16:18:15,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:18:15,090 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:15,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:15,090 INFO L225 Difference]: With dead ends: 116 [2020-09-11 16:18:15,090 INFO L226 Difference]: Without dead ends: 110 [2020-09-11 16:18:15,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:18:15,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-11 16:18:15,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-09-11 16:18:15,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:18:15,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-09-11 16:18:15,093 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-09-11 16:18:15,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:15,093 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-09-11 16:18:15,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:15,093 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-09-11 16:18:15,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:15,094 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:15,094 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:15,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:15,295 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:15,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:15,295 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-09-11 16:18:15,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:15,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383660508] [2020-09-11 16:18:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:15,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383660508] [2020-09-11 16:18:15,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584630758] [2020-09-11 16:18:15,574 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 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 16:18:15,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:15,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:15,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:15,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:15,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:15,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:15,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876813992] [2020-09-11 16:18:15,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:15,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:15,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:15,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:15,673 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-09-11 16:18:16,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:16,421 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-09-11 16:18:16,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:18:16,422 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:16,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:16,423 INFO L225 Difference]: With dead ends: 117 [2020-09-11 16:18:16,423 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 16:18:16,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:18:16,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 16:18:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-09-11 16:18:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 16:18:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-09-11 16:18:16,426 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-09-11 16:18:16,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:16,426 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-09-11 16:18:16,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:16,426 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-09-11 16:18:16,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:16,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:16,427 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:16,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:16,635 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:16,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:16,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-09-11 16:18:16,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:16,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533435934] [2020-09-11 16:18:16,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:16,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533435934] [2020-09-11 16:18:16,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017739697] [2020-09-11 16:18:16,918 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 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 16:18:16,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:16,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:16,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:16,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:17,014 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:17,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:17,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:17,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553484988] [2020-09-11 16:18:17,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:17,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:17,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:17,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:17,031 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-09-11 16:18:17,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:17,909 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-09-11 16:18:17,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:18:17,910 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:17,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:17,910 INFO L225 Difference]: With dead ends: 114 [2020-09-11 16:18:17,910 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 16:18:17,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:18:17,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 16:18:17,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-09-11 16:18:17,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:18:17,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-09-11 16:18:17,912 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-09-11 16:18:17,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:17,912 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-09-11 16:18:17,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:17,913 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-09-11 16:18:17,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:17,913 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:17,913 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:18,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-11 16:18:18,120 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:18,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-09-11 16:18:18,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:18,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919674205] [2020-09-11 16:18:18,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:18,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919674205] [2020-09-11 16:18:18,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651146766] [2020-09-11 16:18:18,396 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 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 16:18:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:18,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:18,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:18,477 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:18,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:18,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:18,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510479528] [2020-09-11 16:18:18,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:18,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:18,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:18,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:18,479 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-09-11 16:18:19,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:19,277 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-09-11 16:18:19,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:18:19,278 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:19,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:19,279 INFO L225 Difference]: With dead ends: 115 [2020-09-11 16:18:19,279 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 16:18:19,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:18:19,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 16:18:19,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-09-11 16:18:19,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-11 16:18:19,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-09-11 16:18:19,283 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-09-11 16:18:19,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:19,283 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-09-11 16:18:19,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:19,283 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-09-11 16:18:19,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:19,284 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:19,284 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:19,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:19,490 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:19,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:19,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-09-11 16:18:19,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:19,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260777537] [2020-09-11 16:18:19,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:19,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260777537] [2020-09-11 16:18:19,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073285528] [2020-09-11 16:18:19,769 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 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 16:18:19,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:19,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:19,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:19,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:19,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:19,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:19,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:19,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530808630] [2020-09-11 16:18:19,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:19,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:19,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:19,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:19,881 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-09-11 16:18:20,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:20,835 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-09-11 16:18:20,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:18:20,836 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:20,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:20,837 INFO L225 Difference]: With dead ends: 112 [2020-09-11 16:18:20,837 INFO L226 Difference]: Without dead ends: 106 [2020-09-11 16:18:20,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:18:20,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-11 16:18:20,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-09-11 16:18:20,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 16:18:20,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-09-11 16:18:20,840 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-09-11 16:18:20,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:20,840 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-09-11 16:18:20,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:20,840 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-09-11 16:18:20,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:20,840 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:20,840 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:21,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-11 16:18:21,041 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:21,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:21,042 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-09-11 16:18:21,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:21,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297554901] [2020-09-11 16:18:21,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:21,308 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:21,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297554901] [2020-09-11 16:18:21,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165944203] [2020-09-11 16:18:21,309 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 16:18:21,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 16:18:21,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:21,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:21,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:21,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:21,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:21,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063812233] [2020-09-11 16:18:21,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:21,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:21,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:21,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:21,395 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-09-11 16:18:22,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:22,266 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-09-11 16:18:22,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:18:22,267 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:22,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:22,268 INFO L225 Difference]: With dead ends: 113 [2020-09-11 16:18:22,268 INFO L226 Difference]: Without dead ends: 107 [2020-09-11 16:18:22,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 16:18:22,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-11 16:18:22,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-09-11 16:18:22,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:18:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 16:18:22,271 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-09-11 16:18:22,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:22,271 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 16:18:22,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:22,271 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 16:18:22,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:22,272 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:22,272 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:22,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-11 16:18:22,473 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:22,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:22,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-09-11 16:18:22,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:22,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620955949] [2020-09-11 16:18:22,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:22,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620955949] [2020-09-11 16:18:22,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804640862] [2020-09-11 16:18:22,746 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 16:18:22,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:22,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:22,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:22,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:22,836 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:22,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:22,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:22,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35960880] [2020-09-11 16:18:22,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:22,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:22,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:22,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:22,856 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-09-11 16:18:23,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:23,921 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-09-11 16:18:23,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:18:23,922 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:23,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:23,923 INFO L225 Difference]: With dead ends: 110 [2020-09-11 16:18:23,923 INFO L226 Difference]: Without dead ends: 104 [2020-09-11 16:18:23,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 16:18:23,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-11 16:18:23,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-09-11 16:18:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:18:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 16:18:23,926 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-09-11 16:18:23,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:23,927 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 16:18:23,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:23,927 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 16:18:23,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:23,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:23,927 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:24,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-09-11 16:18:24,128 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:24,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:24,129 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-09-11 16:18:24,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:24,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59592896] [2020-09-11 16:18:24,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:24,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59592896] [2020-09-11 16:18:24,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714275980] [2020-09-11 16:18:24,379 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 16:18:24,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:24,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:24,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:24,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:24,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:24,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:24,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801716829] [2020-09-11 16:18:24,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:24,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:24,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:24,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:24,472 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-09-11 16:18:25,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:25,436 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-09-11 16:18:25,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 16:18:25,437 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:25,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:25,438 INFO L225 Difference]: With dead ends: 111 [2020-09-11 16:18:25,438 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 16:18:25,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:18:25,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 16:18:25,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-09-11 16:18:25,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-11 16:18:25,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-09-11 16:18:25,440 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-09-11 16:18:25,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:25,441 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-09-11 16:18:25,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:25,441 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-09-11 16:18:25,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:25,441 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:25,441 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:25,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:25,642 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:25,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:25,643 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-09-11 16:18:25,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:25,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235213949] [2020-09-11 16:18:25,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:25,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235213949] [2020-09-11 16:18:25,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617485569] [2020-09-11 16:18:25,901 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 16:18:25,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:25,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:25,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:25,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:25,996 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:26,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:26,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:26,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699746592] [2020-09-11 16:18:26,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:26,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:26,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:26,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:26,015 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-09-11 16:18:27,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:27,205 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-09-11 16:18:27,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 16:18:27,206 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:27,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:27,206 INFO L225 Difference]: With dead ends: 108 [2020-09-11 16:18:27,207 INFO L226 Difference]: Without dead ends: 102 [2020-09-11 16:18:27,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 16:18:27,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-11 16:18:27,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-09-11 16:18:27,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 16:18:27,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-11 16:18:27,209 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-09-11 16:18:27,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:27,209 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-11 16:18:27,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:27,209 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-11 16:18:27,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:27,210 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:27,210 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:27,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-11 16:18:27,413 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:27,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:27,414 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-09-11 16:18:27,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:27,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594129295] [2020-09-11 16:18:27,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:27,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594129295] [2020-09-11 16:18:27,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796213237] [2020-09-11 16:18:27,645 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 16:18:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:27,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:18:27,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:27,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:27,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 16:18:27,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203264008] [2020-09-11 16:18:27,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:18:27,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:27,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:18:27,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:18:27,734 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-09-11 16:18:28,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:28,741 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-09-11 16:18:28,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:18:28,743 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 16:18:28,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:28,743 INFO L225 Difference]: With dead ends: 128 [2020-09-11 16:18:28,743 INFO L226 Difference]: Without dead ends: 122 [2020-09-11 16:18:28,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 16:18:28,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-11 16:18:28,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-09-11 16:18:28,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 16:18:28,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-09-11 16:18:28,746 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-09-11 16:18:28,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:28,746 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-09-11 16:18:28,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:18:28,747 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-09-11 16:18:28,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 16:18:28,747 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:28,747 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:28,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:28,956 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:28,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:28,957 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-09-11 16:18:28,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:28,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573557940] [2020-09-11 16:18:28,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:28,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:29,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573557940] [2020-09-11 16:18:29,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776026609] [2020-09-11 16:18:29,208 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 16:18:29,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:29,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:29,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:29,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:29,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:29,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:18:29,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810757470] [2020-09-11 16:18:29,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:29,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:29,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:29,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:29,324 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-09-11 16:18:30,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:30,523 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-09-11 16:18:30,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 16:18:30,525 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 16:18:30,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:30,525 INFO L225 Difference]: With dead ends: 109 [2020-09-11 16:18:30,525 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:18:30,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=733, Invalid=1817, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 16:18:30,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:18:30,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-09-11 16:18:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 16:18:30,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-09-11 16:18:30,528 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-09-11 16:18:30,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:30,528 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-09-11 16:18:30,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:30,528 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-09-11 16:18:30,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:30,529 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:30,529 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:30,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:30,730 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:30,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:30,730 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-09-11 16:18:30,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:30,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609576968] [2020-09-11 16:18:30,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:31,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609576968] [2020-09-11 16:18:31,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201128569] [2020-09-11 16:18:31,085 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 16:18:31,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 16:18:31,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:31,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:31,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:31,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:31,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:31,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879453741] [2020-09-11 16:18:31,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:31,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:31,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:31,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:31,171 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-09-11 16:18:31,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:31,767 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-09-11 16:18:31,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:18:31,768 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:31,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:31,769 INFO L225 Difference]: With dead ends: 124 [2020-09-11 16:18:31,769 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 16:18:31,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-09-11 16:18:31,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 16:18:31,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-09-11 16:18:31,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:31,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:31,772 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:31,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:31,772 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:31,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:31,772 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:31,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:31,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:31,773 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:31,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:31,980 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:31,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:31,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-09-11 16:18:31,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:31,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876510504] [2020-09-11 16:18:31,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:32,347 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:32,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876510504] [2020-09-11 16:18:32,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403389664] [2020-09-11 16:18:32,348 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 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 16:18:32,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:32,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:32,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:32,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:32,441 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:32,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:32,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:32,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063969440] [2020-09-11 16:18:32,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:32,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:32,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:32,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:32,456 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:33,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:33,162 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-11 16:18:33,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:18:33,166 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:33,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:33,166 INFO L225 Difference]: With dead ends: 121 [2020-09-11 16:18:33,166 INFO L226 Difference]: Without dead ends: 115 [2020-09-11 16:18:33,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:18:33,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-11 16:18:33,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-09-11 16:18:33,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:33,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:33,168 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:33,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:33,168 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:33,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:33,168 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:33,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:33,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:33,169 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:33,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:33,369 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:33,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:33,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-09-11 16:18:33,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:33,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566646744] [2020-09-11 16:18:33,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:33,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566646744] [2020-09-11 16:18:33,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75094482] [2020-09-11 16:18:33,701 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 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 16:18:33,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:33,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:33,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:33,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:33,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:33,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:33,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374681082] [2020-09-11 16:18:33,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:33,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:33,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:33,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:33,787 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:34,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:34,432 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-11 16:18:34,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:18:34,433 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:34,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:34,433 INFO L225 Difference]: With dead ends: 118 [2020-09-11 16:18:34,434 INFO L226 Difference]: Without dead ends: 112 [2020-09-11 16:18:34,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-09-11 16:18:34,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-11 16:18:34,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-09-11 16:18:34,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:34,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:34,436 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:34,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:34,437 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:34,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:34,437 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:34,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:34,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:34,437 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:34,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:34,638 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:34,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:34,638 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-09-11 16:18:34,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:34,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836672271] [2020-09-11 16:18:34,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:34,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836672271] [2020-09-11 16:18:34,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212264676] [2020-09-11 16:18:34,980 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 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 16:18:35,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:35,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:35,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:35,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:35,080 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:35,095 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:35,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:35,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:35,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069933180] [2020-09-11 16:18:35,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:35,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:35,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:35,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:35,096 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:35,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:35,908 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-09-11 16:18:35,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:18:35,909 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:35,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:35,911 INFO L225 Difference]: With dead ends: 117 [2020-09-11 16:18:35,911 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 16:18:35,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:18:35,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 16:18:35,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-09-11 16:18:35,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:35,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:35,913 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:35,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:35,914 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:35,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:35,914 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:35,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:35,914 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:35,914 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:36,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-11 16:18:36,115 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:36,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:36,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-09-11 16:18:36,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:36,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071172281] [2020-09-11 16:18:36,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:36,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071172281] [2020-09-11 16:18:36,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778606294] [2020-09-11 16:18:36,442 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 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 16:18:36,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:36,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:36,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:36,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:36,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:36,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902925547] [2020-09-11 16:18:36,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:36,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:36,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:36,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:36,521 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:37,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:37,263 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-09-11 16:18:37,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:18:37,264 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:37,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:37,264 INFO L225 Difference]: With dead ends: 114 [2020-09-11 16:18:37,265 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 16:18:37,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:18:37,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 16:18:37,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-09-11 16:18:37,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:37,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:37,266 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:37,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:37,267 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:37,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:37,267 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:37,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:37,267 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:37,267 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:37,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-11 16:18:37,470 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:37,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:37,471 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-09-11 16:18:37,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:37,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732255495] [2020-09-11 16:18:37,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:37,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732255495] [2020-09-11 16:18:37,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746241448] [2020-09-11 16:18:37,799 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 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 16:18:37,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:37,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:37,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:37,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:37,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:37,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:37,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:37,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113322364] [2020-09-11 16:18:37,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:37,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:37,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:37,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:37,910 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:38,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:38,844 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-09-11 16:18:38,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:18:38,845 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:38,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:38,846 INFO L225 Difference]: With dead ends: 113 [2020-09-11 16:18:38,846 INFO L226 Difference]: Without dead ends: 107 [2020-09-11 16:18:38,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:18:38,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-11 16:18:38,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-09-11 16:18:38,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:38,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:38,848 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:38,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:38,848 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:38,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:38,849 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:38,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:38,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:38,849 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:39,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-11 16:18:39,055 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:39,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:39,056 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-09-11 16:18:39,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:39,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162336070] [2020-09-11 16:18:39,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:39,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162336070] [2020-09-11 16:18:39,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637584231] [2020-09-11 16:18:39,363 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 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 16:18:39,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 16:18:39,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:39,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:39,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:39,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:39,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:39,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185679876] [2020-09-11 16:18:39,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:39,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:39,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:39,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:39,451 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:40,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:40,288 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-09-11 16:18:40,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:18:40,289 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:40,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:40,290 INFO L225 Difference]: With dead ends: 110 [2020-09-11 16:18:40,290 INFO L226 Difference]: Without dead ends: 104 [2020-09-11 16:18:40,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:18:40,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-11 16:18:40,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-09-11 16:18:40,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:40,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:40,294 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:40,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:40,294 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:40,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:40,294 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:40,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:40,295 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:40,295 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:40,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-11 16:18:40,504 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:40,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:40,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-09-11 16:18:40,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:40,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265241465] [2020-09-11 16:18:40,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:40,806 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:40,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265241465] [2020-09-11 16:18:40,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701976931] [2020-09-11 16:18:40,806 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 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 16:18:40,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:40,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:40,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:40,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:40,902 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:40,925 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:40,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:40,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:40,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258644256] [2020-09-11 16:18:40,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:40,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:40,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:40,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:40,927 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:41,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:41,972 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-09-11 16:18:41,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:18:41,973 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:41,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:41,973 INFO L225 Difference]: With dead ends: 109 [2020-09-11 16:18:41,973 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 16:18:41,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 16:18:41,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 16:18:41,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-09-11 16:18:41,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:41,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:41,976 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:41,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:41,977 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:41,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:41,977 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:41,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:41,977 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:41,978 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:42,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:42,179 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:42,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:42,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-09-11 16:18:42,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:42,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019653776] [2020-09-11 16:18:42,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:42,481 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:42,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019653776] [2020-09-11 16:18:42,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732617745] [2020-09-11 16:18:42,482 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 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 16:18:42,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:42,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:42,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:42,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:42,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:42,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:42,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317107468] [2020-09-11 16:18:42,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:42,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:42,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:42,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:42,580 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:43,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:43,480 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-09-11 16:18:43,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:18:43,481 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:43,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:43,482 INFO L225 Difference]: With dead ends: 106 [2020-09-11 16:18:43,482 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 16:18:43,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:18:43,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 16:18:43,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-09-11 16:18:43,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:43,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:43,485 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:43,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:43,485 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:43,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:43,485 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:43,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:43,486 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:43,486 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:43,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-09-11 16:18:43,687 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:43,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:43,687 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-09-11 16:18:43,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:43,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46341770] [2020-09-11 16:18:43,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:43,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:43,993 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:43,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46341770] [2020-09-11 16:18:43,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764493217] [2020-09-11 16:18:43,994 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 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 16:18:44,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:44,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:44,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:44,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:44,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:44,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:44,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:44,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983261250] [2020-09-11 16:18:44,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:44,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:44,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:44,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:44,108 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:45,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:45,264 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-09-11 16:18:45,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:18:45,264 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:45,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:45,265 INFO L225 Difference]: With dead ends: 105 [2020-09-11 16:18:45,265 INFO L226 Difference]: Without dead ends: 99 [2020-09-11 16:18:45,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:18:45,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-11 16:18:45,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-09-11 16:18:45,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:45,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:45,268 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:45,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:45,268 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:45,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:45,268 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:45,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:45,269 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:45,269 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:45,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:45,470 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:45,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:45,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-09-11 16:18:45,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:45,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167889853] [2020-09-11 16:18:45,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:45,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167889853] [2020-09-11 16:18:45,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739903716] [2020-09-11 16:18:45,754 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 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 16:18:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:45,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:45,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:45,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:45,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:45,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293358094] [2020-09-11 16:18:45,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:45,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:45,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:45,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:45,844 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:46,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:46,833 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-09-11 16:18:46,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:18:46,833 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:46,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:46,834 INFO L225 Difference]: With dead ends: 102 [2020-09-11 16:18:46,834 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 16:18:46,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 16:18:46,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 16:18:46,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-09-11 16:18:46,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:46,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:46,837 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:46,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:46,837 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:46,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:46,838 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:46,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:46,838 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:46,838 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:47,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:47,039 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:47,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:47,039 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-09-11 16:18:47,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:47,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307877063] [2020-09-11 16:18:47,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:47,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307877063] [2020-09-11 16:18:47,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658606692] [2020-09-11 16:18:47,308 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 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 16:18:47,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:47,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:47,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:47,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:47,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:47,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:47,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:47,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801075358] [2020-09-11 16:18:47,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:47,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:47,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:47,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:47,423 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:48,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:48,691 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-11 16:18:48,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 16:18:48,692 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:48,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:48,693 INFO L225 Difference]: With dead ends: 101 [2020-09-11 16:18:48,693 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 16:18:48,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 16:18:48,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 16:18:48,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-09-11 16:18:48,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:48,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:48,696 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:48,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:48,696 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:48,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:48,697 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:48,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:48,697 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:48,697 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:48,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-09-11 16:18:48,900 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:48,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:48,901 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-09-11 16:18:48,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:48,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496362747] [2020-09-11 16:18:48,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:49,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496362747] [2020-09-11 16:18:49,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058340157] [2020-09-11 16:18:49,185 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 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 16:18:49,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 16:18:49,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:49,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:49,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:49,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:49,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:49,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237406021] [2020-09-11 16:18:49,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:49,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:49,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:49,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:49,283 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:50,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:50,353 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-09-11 16:18:50,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 16:18:50,354 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:50,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:50,354 INFO L225 Difference]: With dead ends: 98 [2020-09-11 16:18:50,355 INFO L226 Difference]: Without dead ends: 92 [2020-09-11 16:18:50,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 16:18:50,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-11 16:18:50,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-09-11 16:18:50,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:18:50,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:18:50,357 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 16:18:50,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:50,357 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:18:50,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:50,357 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:18:50,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:50,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:50,358 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:50,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:18:50,558 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:50,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:50,559 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-09-11 16:18:50,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:50,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811865106] [2020-09-11 16:18:50,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:50,845 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:50,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811865106] [2020-09-11 16:18:50,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763849246] [2020-09-11 16:18:50,846 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 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 16:18:50,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:18:50,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:50,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:50,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:50,937 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:50,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:50,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:50,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893794927] [2020-09-11 16:18:50,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:50,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:50,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:50,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:50,959 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 16:18:52,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:52,347 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-09-11 16:18:52,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 16:18:52,348 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:52,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:52,349 INFO L225 Difference]: With dead ends: 97 [2020-09-11 16:18:52,349 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 16:18:52,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-09-11 16:18:52,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 16:18:52,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-09-11 16:18:52,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:18:52,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:18:52,351 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 16:18:52,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:52,351 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:18:52,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:52,351 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:18:52,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:52,352 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:52,352 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:52,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-11 16:18:52,553 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:52,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:52,553 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-09-11 16:18:52,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:52,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856896935] [2020-09-11 16:18:52,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:52,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856896935] [2020-09-11 16:18:52,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336052431] [2020-09-11 16:18:52,841 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 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 16:18:52,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 16:18:52,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:52,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:52,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:52,936 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:52,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:52,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 16:18:52,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944787444] [2020-09-11 16:18:52,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:18:52,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:52,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:18:52,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:18:52,938 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 16:18:54,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:54,066 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-11 16:18:54,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:18:54,067 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 16:18:54,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:54,068 INFO L225 Difference]: With dead ends: 113 [2020-09-11 16:18:54,068 INFO L226 Difference]: Without dead ends: 107 [2020-09-11 16:18:54,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 16:18:54,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-11 16:18:54,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-09-11 16:18:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-11 16:18:54,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-09-11 16:18:54,071 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-09-11 16:18:54,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:54,071 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-09-11 16:18:54,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:18:54,072 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-09-11 16:18:54,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:54,072 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:54,072 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:54,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-11 16:18:54,273 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:54,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:54,273 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-09-11 16:18:54,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:54,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993019943] [2020-09-11 16:18:54,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:54,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993019943] [2020-09-11 16:18:54,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161128028] [2020-09-11 16:18:54,561 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 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 16:18:54,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 16:18:54,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:54,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:54,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:54,667 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:18:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:54,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:54,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:54,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350548254] [2020-09-11 16:18:54,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:54,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:54,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:54,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:54,691 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-09-11 16:18:56,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:56,092 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-09-11 16:18:56,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 16:18:56,093 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:56,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:56,094 INFO L225 Difference]: With dead ends: 94 [2020-09-11 16:18:56,094 INFO L226 Difference]: Without dead ends: 86 [2020-09-11 16:18:56,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-09-11 16:18:56,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-11 16:18:56,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-09-11 16:18:56,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-11 16:18:56,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-09-11 16:18:56,097 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-09-11 16:18:56,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:56,097 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-09-11 16:18:56,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:56,097 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-09-11 16:18:56,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 16:18:56,097 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:56,097 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:56,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-11 16:18:56,298 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:56,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:56,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-09-11 16:18:56,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:56,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828680006] [2020-09-11 16:18:56,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:56,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828680006] [2020-09-11 16:18:56,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170036072] [2020-09-11 16:18:56,582 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 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 16:18:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:56,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:18:56,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:56,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:18:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:56,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:56,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:18:56,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933836731] [2020-09-11 16:18:56,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:18:56,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:56,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:18:56,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:18:56,697 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-09-11 16:18:58,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:18:58,040 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-11 16:18:58,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:18:58,041 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 16:18:58,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:18:58,042 INFO L225 Difference]: With dead ends: 108 [2020-09-11 16:18:58,042 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 16:18:58,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-09-11 16:18:58,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 16:18:58,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-09-11 16:18:58,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 16:18:58,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-11 16:18:58,044 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-09-11 16:18:58,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:18:58,045 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-11 16:18:58,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:18:58,045 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-11 16:18:58,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:18:58,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:18:58,045 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:18:58,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-11 16:18:58,246 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:18:58,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:18:58,246 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-09-11 16:18:58,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:18:58,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569518970] [2020-09-11 16:18:58,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:18:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:18:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:58,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569518970] [2020-09-11 16:18:58,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712947439] [2020-09-11 16:18:58,563 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 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 16:18:58,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:18:58,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:18:58,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:18:58,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:18:58,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:18:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:18:58,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:18:58,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:18:58,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416869585] [2020-09-11 16:18:58,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:18:58,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:18:58,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:18:58,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:18:58,690 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-09-11 16:19:00,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:00,126 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-09-11 16:19:00,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:19:00,127 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:00,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:00,127 INFO L225 Difference]: With dead ends: 90 [2020-09-11 16:19:00,127 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 16:19:00,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-09-11 16:19:00,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 16:19:00,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-11 16:19:00,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 16:19:00,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-11 16:19:00,130 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-09-11 16:19:00,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:00,131 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-11 16:19:00,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:00,131 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-11 16:19:00,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:00,131 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:00,131 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:00,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:00,332 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:00,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:00,333 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-09-11 16:19:00,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:00,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770027641] [2020-09-11 16:19:00,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:00,725 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:00,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770027641] [2020-09-11 16:19:00,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460739485] [2020-09-11 16:19:00,726 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 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 16:19:00,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:19:00,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:00,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:00,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:00,812 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:00,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:00,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:00,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967879970] [2020-09-11 16:19:00,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:00,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:00,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:00,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:00,813 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-09-11 16:19:01,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:01,423 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-09-11 16:19:01,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:19:01,424 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:01,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:01,425 INFO L225 Difference]: With dead ends: 96 [2020-09-11 16:19:01,425 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 16:19:01,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 16:19:01,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 16:19:01,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-09-11 16:19:01,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:19:01,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-09-11 16:19:01,427 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-09-11 16:19:01,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:01,427 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-09-11 16:19:01,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:01,427 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-09-11 16:19:01,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:01,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:01,427 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:01,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:01,628 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:01,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:01,629 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-09-11 16:19:01,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:01,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773815793] [2020-09-11 16:19:01,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:02,038 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:02,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773815793] [2020-09-11 16:19:02,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950492100] [2020-09-11 16:19:02,039 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 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 16:19:02,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:19:02,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:02,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:02,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:02,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:02,146 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:02,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:02,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:02,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000071875] [2020-09-11 16:19:02,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:02,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:02,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:02,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:02,147 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-09-11 16:19:02,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:02,849 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-09-11 16:19:02,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 16:19:02,851 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:02,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:02,851 INFO L225 Difference]: With dead ends: 114 [2020-09-11 16:19:02,851 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 16:19:02,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 16:19:02,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 16:19:02,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-09-11 16:19:02,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 16:19:02,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-09-11 16:19:02,854 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-09-11 16:19:02,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:02,854 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-09-11 16:19:02,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:02,855 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-09-11 16:19:02,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:02,855 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:02,855 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:03,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:03,056 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:03,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:03,056 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-09-11 16:19:03,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:03,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634994859] [2020-09-11 16:19:03,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:03,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634994859] [2020-09-11 16:19:03,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808578447] [2020-09-11 16:19:03,443 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 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 16:19:03,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:19:03,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:03,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:03,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:03,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:03,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:03,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965886612] [2020-09-11 16:19:03,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:03,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:03,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:03,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:03,528 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-09-11 16:19:04,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:04,296 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-09-11 16:19:04,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:19:04,297 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:04,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:04,297 INFO L225 Difference]: With dead ends: 115 [2020-09-11 16:19:04,297 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 16:19:04,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:19:04,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 16:19:04,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-09-11 16:19:04,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 16:19:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-09-11 16:19:04,300 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-09-11 16:19:04,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:04,301 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-09-11 16:19:04,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:04,301 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-09-11 16:19:04,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:04,301 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:04,301 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:04,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:04,502 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:04,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:04,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-09-11 16:19:04,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:04,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254254915] [2020-09-11 16:19:04,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:04,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254254915] [2020-09-11 16:19:04,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233735931] [2020-09-11 16:19:04,897 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 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 16:19:04,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:19:04,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:04,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:04,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:04,996 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:05,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:05,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:05,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955062013] [2020-09-11 16:19:05,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:05,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:05,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:05,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:05,016 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-09-11 16:19:05,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:05,832 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-09-11 16:19:05,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:19:05,833 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:05,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:05,834 INFO L225 Difference]: With dead ends: 129 [2020-09-11 16:19:05,834 INFO L226 Difference]: Without dead ends: 123 [2020-09-11 16:19:05,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:19:05,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-11 16:19:05,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-09-11 16:19:05,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:19:05,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-09-11 16:19:05,843 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-09-11 16:19:05,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:05,843 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-09-11 16:19:05,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:05,844 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-09-11 16:19:05,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:05,844 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:05,844 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:06,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:06,048 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:06,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:06,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-09-11 16:19:06,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:06,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784514261] [2020-09-11 16:19:06,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:06,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784514261] [2020-09-11 16:19:06,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975820964] [2020-09-11 16:19:06,409 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 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 16:19:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:06,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:06,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:06,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:06,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:06,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149617441] [2020-09-11 16:19:06,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:06,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:06,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:06,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:06,489 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-09-11 16:19:07,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:07,329 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-09-11 16:19:07,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:19:07,331 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:07,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:07,331 INFO L225 Difference]: With dead ends: 129 [2020-09-11 16:19:07,331 INFO L226 Difference]: Without dead ends: 123 [2020-09-11 16:19:07,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:19:07,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-11 16:19:07,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-09-11 16:19:07,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-11 16:19:07,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-09-11 16:19:07,334 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-09-11 16:19:07,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:07,334 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-09-11 16:19:07,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:07,335 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-09-11 16:19:07,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:07,335 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:07,335 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:07,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:07,536 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:07,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:07,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-09-11 16:19:07,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:07,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281034752] [2020-09-11 16:19:07,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:07,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281034752] [2020-09-11 16:19:07,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904627655] [2020-09-11 16:19:07,914 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 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 16:19:07,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:19:07,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:07,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:07,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:08,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:08,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:08,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:08,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964396583] [2020-09-11 16:19:08,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:08,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:08,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:08,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:08,026 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-09-11 16:19:08,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:08,953 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-09-11 16:19:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:19:08,954 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:08,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:08,955 INFO L225 Difference]: With dead ends: 126 [2020-09-11 16:19:08,955 INFO L226 Difference]: Without dead ends: 120 [2020-09-11 16:19:08,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:19:08,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-11 16:19:08,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-09-11 16:19:08,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 16:19:08,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-09-11 16:19:08,964 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-09-11 16:19:08,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:08,964 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-09-11 16:19:08,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:08,964 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-09-11 16:19:08,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:08,964 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:08,964 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:09,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:09,165 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:09,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:09,166 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-09-11 16:19:09,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:09,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211827722] [2020-09-11 16:19:09,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:09,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:09,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211827722] [2020-09-11 16:19:09,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651371616] [2020-09-11 16:19:09,524 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 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 16:19:09,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:19:09,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:09,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:09,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:09,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:09,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:09,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829988111] [2020-09-11 16:19:09,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:09,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:09,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:09,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:09,616 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-09-11 16:19:10,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:10,522 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-09-11 16:19:10,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:19:10,523 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:10,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:10,524 INFO L225 Difference]: With dead ends: 127 [2020-09-11 16:19:10,524 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 16:19:10,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 16:19:10,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 16:19:10,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-09-11 16:19:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 16:19:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-09-11 16:19:10,527 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-09-11 16:19:10,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:10,527 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-09-11 16:19:10,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:10,527 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-09-11 16:19:10,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:10,528 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:10,528 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:10,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-11 16:19:10,729 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:10,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:10,729 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-09-11 16:19:10,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:10,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54291666] [2020-09-11 16:19:10,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:11,087 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:11,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54291666] [2020-09-11 16:19:11,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77108333] [2020-09-11 16:19:11,087 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 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 16:19:11,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:19:11,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:11,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:11,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:11,182 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:11,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:11,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:11,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277607796] [2020-09-11 16:19:11,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:11,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:11,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:11,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:11,202 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-09-11 16:19:12,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:12,268 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-09-11 16:19:12,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:19:12,269 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:12,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:12,270 INFO L225 Difference]: With dead ends: 124 [2020-09-11 16:19:12,270 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 16:19:12,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 16:19:12,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 16:19:12,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-09-11 16:19:12,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:19:12,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-09-11 16:19:12,272 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-09-11 16:19:12,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:12,273 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-09-11 16:19:12,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:12,273 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-09-11 16:19:12,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:12,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:12,273 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:12,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-09-11 16:19:12,480 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:12,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:12,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-09-11 16:19:12,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:12,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084471413] [2020-09-11 16:19:12,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:12,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084471413] [2020-09-11 16:19:12,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257059875] [2020-09-11 16:19:12,800 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 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 16:19:12,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:19:12,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:12,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:12,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:12,892 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:12,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:12,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:12,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551933205] [2020-09-11 16:19:12,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:12,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:12,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:12,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:12,894 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-09-11 16:19:13,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:13,826 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-09-11 16:19:13,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:19:13,827 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:13,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:13,828 INFO L225 Difference]: With dead ends: 125 [2020-09-11 16:19:13,828 INFO L226 Difference]: Without dead ends: 119 [2020-09-11 16:19:13,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:19:13,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-11 16:19:13,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-09-11 16:19:13,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-11 16:19:13,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-09-11 16:19:13,831 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-09-11 16:19:13,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:13,831 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-09-11 16:19:13,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:13,832 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-09-11 16:19:13,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:13,832 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:13,832 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:14,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-11 16:19:14,033 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:14,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:14,033 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-09-11 16:19:14,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:14,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569292786] [2020-09-11 16:19:14,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:14,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569292786] [2020-09-11 16:19:14,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674765463] [2020-09-11 16:19:14,385 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 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 16:19:14,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:19:14,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:14,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:14,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:14,490 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:14,508 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:14,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:14,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:14,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747384198] [2020-09-11 16:19:14,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:14,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:14,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:14,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:14,509 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-09-11 16:19:15,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:15,664 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-09-11 16:19:15,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:19:15,666 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:15,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:15,666 INFO L225 Difference]: With dead ends: 122 [2020-09-11 16:19:15,666 INFO L226 Difference]: Without dead ends: 116 [2020-09-11 16:19:15,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 16:19:15,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-11 16:19:15,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-09-11 16:19:15,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 16:19:15,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-09-11 16:19:15,669 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-09-11 16:19:15,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:15,669 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-09-11 16:19:15,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:15,670 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-09-11 16:19:15,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:15,670 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:15,670 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:15,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-11 16:19:15,871 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:15,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:15,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-09-11 16:19:15,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:15,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169168592] [2020-09-11 16:19:15,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:16,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169168592] [2020-09-11 16:19:16,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45939201] [2020-09-11 16:19:16,208 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 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 16:19:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:16,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:16,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:16,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:16,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:16,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308509896] [2020-09-11 16:19:16,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:16,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:16,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:16,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:16,296 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-09-11 16:19:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:17,358 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-11 16:19:17,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 16:19:17,359 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:17,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:17,360 INFO L225 Difference]: With dead ends: 123 [2020-09-11 16:19:17,361 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 16:19:17,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 16:19:17,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 16:19:17,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-09-11 16:19:17,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 16:19:17,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-09-11 16:19:17,364 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-09-11 16:19:17,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:17,364 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-09-11 16:19:17,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:17,364 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-09-11 16:19:17,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:17,364 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:17,364 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:17,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:17,565 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:17,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:17,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-09-11 16:19:17,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:17,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317904896] [2020-09-11 16:19:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:17,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317904896] [2020-09-11 16:19:17,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144235046] [2020-09-11 16:19:17,913 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 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 16:19:17,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:19:17,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:17,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:17,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:18,011 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:18,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:18,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:18,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986693046] [2020-09-11 16:19:18,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:18,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:18,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:18,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:18,033 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-09-11 16:19:19,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:19,309 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-09-11 16:19:19,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 16:19:19,310 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:19,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:19,310 INFO L225 Difference]: With dead ends: 120 [2020-09-11 16:19:19,311 INFO L226 Difference]: Without dead ends: 114 [2020-09-11 16:19:19,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 16:19:19,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-11 16:19:19,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-09-11 16:19:19,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-11 16:19:19,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-09-11 16:19:19,313 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-09-11 16:19:19,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:19,313 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-09-11 16:19:19,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:19,314 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-09-11 16:19:19,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:19,314 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:19,314 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:19,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:19,515 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:19,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:19,515 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-09-11 16:19:19,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:19,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072195292] [2020-09-11 16:19:19,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:19,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072195292] [2020-09-11 16:19:19,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994594342] [2020-09-11 16:19:19,842 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 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 16:19:19,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:19:19,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:19,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:19,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:19,935 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:19,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:19,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:19,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950051410] [2020-09-11 16:19:19,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:19,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:19,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:19,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:19,936 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-09-11 16:19:21,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:21,063 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-11 16:19:21,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:19:21,065 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:21,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:21,065 INFO L225 Difference]: With dead ends: 121 [2020-09-11 16:19:21,065 INFO L226 Difference]: Without dead ends: 115 [2020-09-11 16:19:21,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-09-11 16:19:21,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-11 16:19:21,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-09-11 16:19:21,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 16:19:21,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 16:19:21,068 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-09-11 16:19:21,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:21,068 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 16:19:21,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:21,069 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 16:19:21,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:21,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:21,069 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:21,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-11 16:19:21,270 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:21,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:21,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-09-11 16:19:21,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:21,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335580495] [2020-09-11 16:19:21,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:21,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335580495] [2020-09-11 16:19:21,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012845846] [2020-09-11 16:19:21,584 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 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 16:19:21,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:19:21,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:21,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:21,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:21,680 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:21,712 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:21,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:21,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:21,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860659710] [2020-09-11 16:19:21,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:21,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:21,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:21,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:21,714 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-09-11 16:19:23,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:23,093 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-11 16:19:23,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 16:19:23,095 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:23,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:23,095 INFO L225 Difference]: With dead ends: 118 [2020-09-11 16:19:23,095 INFO L226 Difference]: Without dead ends: 112 [2020-09-11 16:19:23,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-09-11 16:19:23,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-11 16:19:23,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-09-11 16:19:23,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 16:19:23,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 16:19:23,098 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-09-11 16:19:23,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:23,098 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 16:19:23,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:23,099 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 16:19:23,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:23,099 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:23,099 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:23,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:23,300 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:23,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:23,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-09-11 16:19:23,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:23,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867042266] [2020-09-11 16:19:23,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:23,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867042266] [2020-09-11 16:19:23,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275239350] [2020-09-11 16:19:23,630 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 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 16:19:23,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:19:23,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:23,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:23,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:23,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:23,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:23,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86764990] [2020-09-11 16:19:23,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:23,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:23,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:23,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:23,734 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-09-11 16:19:24,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:24,924 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-09-11 16:19:24,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-11 16:19:24,925 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:24,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:24,925 INFO L225 Difference]: With dead ends: 119 [2020-09-11 16:19:24,926 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 16:19:24,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-09-11 16:19:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 16:19:24,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-09-11 16:19:24,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-11 16:19:24,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-09-11 16:19:24,930 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-09-11 16:19:24,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:24,931 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-09-11 16:19:24,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:24,931 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-09-11 16:19:24,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:24,931 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:24,931 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:25,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:25,138 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:25,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:25,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-09-11 16:19:25,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:25,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915947369] [2020-09-11 16:19:25,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:25,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915947369] [2020-09-11 16:19:25,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718799273] [2020-09-11 16:19:25,458 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 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 16:19:25,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:19:25,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:25,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:25,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:25,558 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:25,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:25,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:25,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590981551] [2020-09-11 16:19:25,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:25,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:25,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:25,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:25,577 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-09-11 16:19:27,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:27,050 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-09-11 16:19:27,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 16:19:27,051 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:27,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:27,052 INFO L225 Difference]: With dead ends: 116 [2020-09-11 16:19:27,052 INFO L226 Difference]: Without dead ends: 110 [2020-09-11 16:19:27,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-09-11 16:19:27,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-11 16:19:27,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-09-11 16:19:27,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 16:19:27,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-11 16:19:27,055 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-09-11 16:19:27,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:27,056 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-11 16:19:27,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:27,056 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-11 16:19:27,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:27,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:27,056 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:27,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:27,266 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:27,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:27,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-09-11 16:19:27,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:27,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558460210] [2020-09-11 16:19:27,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:27,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558460210] [2020-09-11 16:19:27,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345607868] [2020-09-11 16:19:27,586 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 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 16:19:27,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:27,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:27,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:27,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:27,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 16:19:27,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476763142] [2020-09-11 16:19:27,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:19:27,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:27,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:19:27,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:19:27,681 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-09-11 16:19:28,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:28,959 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-09-11 16:19:28,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 16:19:28,960 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 16:19:28,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:28,961 INFO L225 Difference]: With dead ends: 136 [2020-09-11 16:19:28,961 INFO L226 Difference]: Without dead ends: 130 [2020-09-11 16:19:28,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-09-11 16:19:28,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-11 16:19:28,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-09-11 16:19:28,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-11 16:19:28,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-09-11 16:19:28,965 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-09-11 16:19:28,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:28,965 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-09-11 16:19:28,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:19:28,965 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-09-11 16:19:28,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:19:28,966 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:28,966 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:29,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:29,176 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:29,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:29,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-09-11 16:19:29,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:29,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537912476] [2020-09-11 16:19:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:29,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537912476] [2020-09-11 16:19:29,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602890278] [2020-09-11 16:19:29,481 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 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 16:19:29,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:19:29,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:29,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:19:29,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:29,582 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:29,604 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:29,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:29,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:19:29,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237983717] [2020-09-11 16:19:29,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:29,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:29,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:29,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:29,606 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-09-11 16:19:31,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:31,165 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-09-11 16:19:31,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-11 16:19:31,166 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 16:19:31,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:31,167 INFO L225 Difference]: With dead ends: 117 [2020-09-11 16:19:31,167 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 16:19:31,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-09-11 16:19:31,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 16:19:31,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-09-11 16:19:31,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-11 16:19:31,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-09-11 16:19:31,170 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-09-11 16:19:31,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:31,170 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-09-11 16:19:31,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:31,170 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-09-11 16:19:31,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:31,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:31,171 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:31,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:31,372 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:31,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:31,372 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-09-11 16:19:31,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:31,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137643892] [2020-09-11 16:19:31,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:31,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137643892] [2020-09-11 16:19:31,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906742100] [2020-09-11 16:19:31,814 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:31,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:19:31,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:31,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:31,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:31,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:31,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:31,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556664760] [2020-09-11 16:19:31,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:31,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:31,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:31,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:31,903 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-09-11 16:19:32,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:32,633 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-09-11 16:19:32,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:19:32,634 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:32,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:32,635 INFO L225 Difference]: With dead ends: 134 [2020-09-11 16:19:32,635 INFO L226 Difference]: Without dead ends: 128 [2020-09-11 16:19:32,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 16:19:32,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-11 16:19:32,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-09-11 16:19:32,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:32,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:32,638 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:32,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:32,639 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:32,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:32,639 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:32,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:32,639 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:32,639 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:32,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-09-11 16:19:32,840 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:32,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:32,841 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-09-11 16:19:32,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:32,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425656592] [2020-09-11 16:19:32,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:33,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425656592] [2020-09-11 16:19:33,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869965756] [2020-09-11 16:19:33,293 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:33,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:19:33,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:33,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:33,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:33,400 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:33,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:33,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:33,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633262210] [2020-09-11 16:19:33,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:33,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:33,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:33,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:33,415 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:34,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:34,292 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-09-11 16:19:34,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:19:34,294 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:34,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:34,294 INFO L225 Difference]: With dead ends: 131 [2020-09-11 16:19:34,294 INFO L226 Difference]: Without dead ends: 125 [2020-09-11 16:19:34,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:19:34,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-11 16:19:34,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-09-11 16:19:34,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:34,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:34,297 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:34,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:34,297 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:34,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:34,297 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:34,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:34,298 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:34,298 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:34,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-11 16:19:34,498 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:34,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:34,499 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-09-11 16:19:34,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:34,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541596821] [2020-09-11 16:19:34,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:34,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541596821] [2020-09-11 16:19:34,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957121018] [2020-09-11 16:19:34,931 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:34,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:19:34,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:35,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:35,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:35,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:35,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:35,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541945966] [2020-09-11 16:19:35,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:35,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:35,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:35,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:35,016 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:35,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:35,835 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-09-11 16:19:35,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 16:19:35,837 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:35,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:35,837 INFO L225 Difference]: With dead ends: 128 [2020-09-11 16:19:35,837 INFO L226 Difference]: Without dead ends: 122 [2020-09-11 16:19:35,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:19:35,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-11 16:19:35,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-09-11 16:19:35,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:35,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:35,840 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:35,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:35,840 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:35,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:35,841 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:35,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:35,841 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:35,841 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:36,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:36,042 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:36,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:36,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-09-11 16:19:36,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:36,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412266919] [2020-09-11 16:19:36,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:36,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412266919] [2020-09-11 16:19:36,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759095763] [2020-09-11 16:19:36,468 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:36,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:19:36,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:36,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:36,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:36,580 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:36,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:36,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:36,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028418838] [2020-09-11 16:19:36,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:36,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:36,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:36,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:36,601 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:37,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:37,533 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-09-11 16:19:37,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 16:19:37,535 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:37,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:37,535 INFO L225 Difference]: With dead ends: 127 [2020-09-11 16:19:37,535 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 16:19:37,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 16:19:37,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 16:19:37,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-09-11 16:19:37,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:37,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:37,538 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:37,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:37,539 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:37,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:37,539 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:37,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:37,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:37,539 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:37,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-09-11 16:19:37,740 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:37,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:37,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-09-11 16:19:37,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:37,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135363065] [2020-09-11 16:19:37,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:38,150 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:38,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135363065] [2020-09-11 16:19:38,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685676161] [2020-09-11 16:19:38,150 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:38,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:38,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:38,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:38,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:38,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836117976] [2020-09-11 16:19:38,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:38,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:38,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:38,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:38,235 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:39,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:39,142 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-09-11 16:19:39,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 16:19:39,143 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:39,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:39,144 INFO L225 Difference]: With dead ends: 124 [2020-09-11 16:19:39,144 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 16:19:39,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 16:19:39,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 16:19:39,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-09-11 16:19:39,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:39,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:39,147 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:39,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:39,147 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:39,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:39,147 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:39,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:39,148 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:39,148 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:39,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:39,349 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:39,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:39,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-09-11 16:19:39,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:39,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951597535] [2020-09-11 16:19:39,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:39,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951597535] [2020-09-11 16:19:39,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346591402] [2020-09-11 16:19:39,763 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:39,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:19:39,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:39,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:39,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:39,867 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:39,884 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:39,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:39,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:39,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24995144] [2020-09-11 16:19:39,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:39,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:39,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:39,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:39,885 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:41,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:41,012 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-09-11 16:19:41,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 16:19:41,013 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:41,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:41,014 INFO L225 Difference]: With dead ends: 123 [2020-09-11 16:19:41,014 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 16:19:41,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 16:19:41,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 16:19:41,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-09-11 16:19:41,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:41,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:41,016 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:41,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:41,017 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:41,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:41,017 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:41,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:41,017 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:41,017 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:41,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:41,218 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:41,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:41,219 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-09-11 16:19:41,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:41,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767604592] [2020-09-11 16:19:41,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:41,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767604592] [2020-09-11 16:19:41,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482493569] [2020-09-11 16:19:41,598 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:41,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:19:41,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:41,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:41,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:41,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:41,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:41,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641178350] [2020-09-11 16:19:41,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:41,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:41,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:41,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:41,689 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:42,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:42,693 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-11 16:19:42,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 16:19:42,694 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:42,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:42,695 INFO L225 Difference]: With dead ends: 120 [2020-09-11 16:19:42,695 INFO L226 Difference]: Without dead ends: 114 [2020-09-11 16:19:42,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-09-11 16:19:42,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-11 16:19:42,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-09-11 16:19:42,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:42,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:42,698 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:42,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:42,698 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:42,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:42,698 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:42,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:42,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:42,699 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:42,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:42,900 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:42,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:42,900 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-09-11 16:19:42,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:42,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459297251] [2020-09-11 16:19:42,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:42,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:43,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459297251] [2020-09-11 16:19:43,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457062273] [2020-09-11 16:19:43,292 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:43,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:19:43,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:43,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:43,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:43,387 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:43,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:43,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:43,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917558625] [2020-09-11 16:19:43,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:43,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:43,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:43,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:43,408 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:44,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:44,648 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-09-11 16:19:44,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:19:44,649 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:44,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:44,651 INFO L225 Difference]: With dead ends: 119 [2020-09-11 16:19:44,651 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 16:19:44,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 16:19:44,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 16:19:44,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-09-11 16:19:44,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:44,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:44,662 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:44,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:44,662 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:44,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:44,663 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:44,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:44,663 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:44,663 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:44,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:44,873 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:44,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:44,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-09-11 16:19:44,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:44,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010361020] [2020-09-11 16:19:44,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:45,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010361020] [2020-09-11 16:19:45,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958842983] [2020-09-11 16:19:45,250 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:45,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:19:45,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:45,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:45,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:45,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:45,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:45,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504730208] [2020-09-11 16:19:45,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:45,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:45,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:45,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:45,342 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:46,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:46,433 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-09-11 16:19:46,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 16:19:46,434 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:46,435 INFO L225 Difference]: With dead ends: 116 [2020-09-11 16:19:46,435 INFO L226 Difference]: Without dead ends: 110 [2020-09-11 16:19:46,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-09-11 16:19:46,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-11 16:19:46,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-09-11 16:19:46,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:46,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:46,438 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:46,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:46,438 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:46,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:46,439 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:46,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:46,439 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:46,439 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:46,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-09-11 16:19:46,640 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:46,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:46,640 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-09-11 16:19:46,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:46,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177128698] [2020-09-11 16:19:46,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:46,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:47,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177128698] [2020-09-11 16:19:47,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668697275] [2020-09-11 16:19:47,020 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:47,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:19:47,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:47,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:47,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:47,128 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:47,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:47,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:47,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354040049] [2020-09-11 16:19:47,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:47,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:47,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:47,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:47,146 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:48,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:48,527 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-09-11 16:19:48,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 16:19:48,528 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:48,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:48,529 INFO L225 Difference]: With dead ends: 115 [2020-09-11 16:19:48,529 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 16:19:48,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-09-11 16:19:48,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 16:19:48,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-09-11 16:19:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:48,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:48,532 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:48,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:48,533 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:48,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:48,533 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:48,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:48,533 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:48,533 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:48,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:48,741 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:48,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:48,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-09-11 16:19:48,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:48,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004234252] [2020-09-11 16:19:48,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:49,121 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:49,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004234252] [2020-09-11 16:19:49,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694688966] [2020-09-11 16:19:49,122 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:49,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:49,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:49,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:49,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:49,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247357690] [2020-09-11 16:19:49,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:49,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:49,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:49,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:49,212 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:50,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:50,391 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-09-11 16:19:50,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 16:19:50,392 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:50,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:50,393 INFO L225 Difference]: With dead ends: 112 [2020-09-11 16:19:50,393 INFO L226 Difference]: Without dead ends: 106 [2020-09-11 16:19:50,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 16:19:50,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-11 16:19:50,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-09-11 16:19:50,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:50,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:50,395 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:50,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:50,396 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:50,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:50,396 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:50,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:50,396 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:50,396 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:50,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-09-11 16:19:50,597 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:50,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:50,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-09-11 16:19:50,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:50,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268695112] [2020-09-11 16:19:50,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:50,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268695112] [2020-09-11 16:19:50,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831503123] [2020-09-11 16:19:50,968 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:51,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:19:51,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:51,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:51,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:51,069 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:51,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:51,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:51,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135462888] [2020-09-11 16:19:51,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:51,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:51,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:51,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:51,091 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:52,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:52,587 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-09-11 16:19:52,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 16:19:52,588 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:52,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:52,589 INFO L225 Difference]: With dead ends: 111 [2020-09-11 16:19:52,589 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 16:19:52,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-09-11 16:19:52,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 16:19:52,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-09-11 16:19:52,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:52,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:52,592 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:52,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:52,592 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:52,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:52,593 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:52,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:52,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:52,593 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:52,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-11 16:19:52,794 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:52,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:52,794 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-09-11 16:19:52,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:52,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545902159] [2020-09-11 16:19:52,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:53,154 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:53,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545902159] [2020-09-11 16:19:53,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970567885] [2020-09-11 16:19:53,155 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:53,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:19:53,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:53,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:53,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:53,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:53,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:53,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195608707] [2020-09-11 16:19:53,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:53,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:53,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:53,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:53,260 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:54,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:54,534 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-11 16:19:54,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:19:54,535 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:54,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:54,535 INFO L225 Difference]: With dead ends: 108 [2020-09-11 16:19:54,535 INFO L226 Difference]: Without dead ends: 102 [2020-09-11 16:19:54,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-09-11 16:19:54,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-11 16:19:54,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-09-11 16:19:54,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:54,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:54,538 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:54,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:54,538 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:54,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:54,539 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:54,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:54,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:54,539 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:54,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:54,741 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:54,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:54,741 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-09-11 16:19:54,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:54,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383418739] [2020-09-11 16:19:54,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:55,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383418739] [2020-09-11 16:19:55,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338355516] [2020-09-11 16:19:55,099 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:55,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:19:55,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:55,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:55,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:55,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:55,218 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:55,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:55,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:55,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175466449] [2020-09-11 16:19:55,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:55,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:55,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:55,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:55,220 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:19:56,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:56,869 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-11 16:19:56,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 16:19:56,870 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:19:56,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:56,871 INFO L225 Difference]: With dead ends: 107 [2020-09-11 16:19:56,871 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 16:19:56,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-09-11 16:19:56,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 16:19:56,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-09-11 16:19:56,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:19:56,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:19:56,876 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:19:56,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:56,876 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:19:56,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:19:56,876 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:19:56,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:56,879 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:56,879 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:57,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:57,080 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:57,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:57,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-09-11 16:19:57,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:57,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898928421] [2020-09-11 16:19:57,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:57,444 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:57,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898928421] [2020-09-11 16:19:57,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654555476] [2020-09-11 16:19:57,445 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:57,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 16:19:57,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:57,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:57,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:57,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:57,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:19:57,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697593343] [2020-09-11 16:19:57,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:19:57,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:57,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:19:57,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:19:57,540 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:19:58,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:19:58,917 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-09-11 16:19:58,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-11 16:19:58,918 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:19:58,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:19:58,919 INFO L225 Difference]: With dead ends: 104 [2020-09-11 16:19:58,919 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 16:19:58,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-09-11 16:19:58,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 16:19:58,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-09-11 16:19:58,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 16:19:58,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 16:19:58,922 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 16:19:58,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:19:58,922 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 16:19:58,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:19:58,922 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 16:19:58,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:19:58,922 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:19:58,923 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:19:59,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:59,123 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:19:59,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:19:59,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-09-11 16:19:59,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:19:59,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061390103] [2020-09-11 16:19:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:19:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:19:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:59,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061390103] [2020-09-11 16:19:59,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847174506] [2020-09-11 16:19:59,487 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:19:59,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 16:19:59,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:19:59,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:19:59,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:19:59,598 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:19:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:19:59,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:19:59,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:19:59,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024403505] [2020-09-11 16:19:59,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:19:59,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:19:59,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:19:59,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:19:59,624 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 16:20:01,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:01,413 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-09-11 16:20:01,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-11 16:20:01,415 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:20:01,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:01,415 INFO L225 Difference]: With dead ends: 103 [2020-09-11 16:20:01,415 INFO L226 Difference]: Without dead ends: 97 [2020-09-11 16:20:01,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-09-11 16:20:01,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-11 16:20:01,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-09-11 16:20:01,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 16:20:01,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 16:20:01,418 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 16:20:01,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:01,418 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 16:20:01,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:20:01,419 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 16:20:01,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:20:01,419 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:01,419 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:01,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-09-11 16:20:01,620 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:01,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:01,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-09-11 16:20:01,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:01,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082307603] [2020-09-11 16:20:01,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:01,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082307603] [2020-09-11 16:20:01,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82795158] [2020-09-11 16:20:01,979 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:02,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:20:02,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:02,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:02,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 16:20:02,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681591548] [2020-09-11 16:20:02,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:20:02,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:02,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:20:02,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:20:02,088 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 16:20:03,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:03,560 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-09-11 16:20:03,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 16:20:03,562 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 16:20:03,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:03,562 INFO L225 Difference]: With dead ends: 119 [2020-09-11 16:20:03,562 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 16:20:03,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-09-11 16:20:03,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 16:20:03,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-09-11 16:20:03,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-11 16:20:03,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-09-11 16:20:03,571 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-09-11 16:20:03,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:03,571 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-09-11 16:20:03,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:20:03,571 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-09-11 16:20:03,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:20:03,571 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:03,571 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:03,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:03,772 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:03,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:03,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-09-11 16:20:03,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:03,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063696364] [2020-09-11 16:20:03,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:04,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063696364] [2020-09-11 16:20:04,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287971285] [2020-09-11 16:20:04,137 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:04,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:20:04,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:04,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:20:04,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:04,236 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:20:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:04,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:04,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:20:04,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98065091] [2020-09-11 16:20:04,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:20:04,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:04,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:20:04,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:20:04,262 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-09-11 16:20:06,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:06,149 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-09-11 16:20:06,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-11 16:20:06,150 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:20:06,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:06,150 INFO L225 Difference]: With dead ends: 100 [2020-09-11 16:20:06,150 INFO L226 Difference]: Without dead ends: 92 [2020-09-11 16:20:06,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-09-11 16:20:06,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-11 16:20:06,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-09-11 16:20:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-11 16:20:06,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-09-11 16:20:06,153 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-09-11 16:20:06,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:06,153 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-09-11 16:20:06,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:20:06,153 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-09-11 16:20:06,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 16:20:06,154 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:06,154 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:06,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:06,355 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:06,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:06,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-09-11 16:20:06,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:06,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199566464] [2020-09-11 16:20:06,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:06,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199566464] [2020-09-11 16:20:06,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780135714] [2020-09-11 16:20:06,714 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:06,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:20:06,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:06,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 16:20:06,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:06,818 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:20:06,846 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:06,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:06,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:20:06,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59094394] [2020-09-11 16:20:06,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:20:06,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:06,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:20:06,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:20:06,849 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-09-11 16:20:08,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:08,569 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-09-11 16:20:08,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 16:20:08,570 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 16:20:08,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:08,570 INFO L225 Difference]: With dead ends: 116 [2020-09-11 16:20:08,570 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 16:20:08,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-09-11 16:20:08,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 16:20:08,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-09-11 16:20:08,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-11 16:20:08,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-11 16:20:08,573 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-09-11 16:20:08,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:08,573 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-11 16:20:08,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:20:08,573 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-11 16:20:08,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:08,574 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:08,574 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:08,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:08,778 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:08,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:08,779 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-09-11 16:20:08,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:08,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604983587] [2020-09-11 16:20:08,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:08,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:09,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604983587] [2020-09-11 16:20:09,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736240491] [2020-09-11 16:20:09,171 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:09,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:20:09,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:09,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:09,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:09,285 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 16:20:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:09,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:09,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 16:20:09,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851109909] [2020-09-11 16:20:09,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 16:20:09,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:09,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 16:20:09,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:20:09,316 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-09-11 16:20:11,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:11,163 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-09-11 16:20:11,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 16:20:11,164 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 16:20:11,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:11,164 INFO L225 Difference]: With dead ends: 96 [2020-09-11 16:20:11,165 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 16:20:11,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-09-11 16:20:11,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 16:20:11,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-09-11 16:20:11,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 16:20:11,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-11 16:20:11,168 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-09-11 16:20:11,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:11,169 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-11 16:20:11,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 16:20:11,169 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-11 16:20:11,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:11,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:11,170 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:11,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:11,378 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:11,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:11,379 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-09-11 16:20:11,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:11,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532187607] [2020-09-11 16:20:11,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:11,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532187607] [2020-09-11 16:20:11,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848339942] [2020-09-11 16:20:11,872 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:11,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-11 16:20:11,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:11,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:11,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:11,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:11,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 16:20:11,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397710500] [2020-09-11 16:20:11,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:20:11,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:11,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:20:11,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:20:11,956 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-09-11 16:20:12,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:12,737 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-09-11 16:20:12,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 16:20:12,738 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-11 16:20:12,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:12,739 INFO L225 Difference]: With dead ends: 102 [2020-09-11 16:20:12,739 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 16:20:12,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 16:20:12,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 16:20:12,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-09-11 16:20:12,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 16:20:12,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-09-11 16:20:12,742 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-09-11 16:20:12,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:12,742 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-09-11 16:20:12,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:20:12,743 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-09-11 16:20:12,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:12,743 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:12,743 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:12,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-09-11 16:20:12,944 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:12,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:12,945 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-09-11 16:20:12,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:12,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35723511] [2020-09-11 16:20:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:13,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35723511] [2020-09-11 16:20:13,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838282783] [2020-09-11 16:20:13,447 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:20:13,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-11 16:20:13,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:20:13,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:13,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:13,551 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 16:20:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:13,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:20:13,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 16:20:13,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514690237] [2020-09-11 16:20:13,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 16:20:13,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:20:13,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 16:20:13,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:20:13,569 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-09-11 16:20:14,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:20:14,345 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-09-11 16:20:14,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 16:20:14,346 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 16:20:14,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:20:14,347 INFO L225 Difference]: With dead ends: 122 [2020-09-11 16:20:14,347 INFO L226 Difference]: Without dead ends: 116 [2020-09-11 16:20:14,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-09-11 16:20:14,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-11 16:20:14,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-09-11 16:20:14,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 16:20:14,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-09-11 16:20:14,350 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-09-11 16:20:14,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:20:14,350 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-09-11 16:20:14,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 16:20:14,350 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-09-11 16:20:14,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 16:20:14,351 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:20:14,351 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:20:14,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-11 16:20:14,552 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:20:14,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:20:14,552 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-09-11 16:20:14,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:20:14,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055489188] [2020-09-11 16:20:14,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:20:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:20:15,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055489188] [2020-09-11 16:20:15,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639723621] [2020-09-11 16:20:15,049 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true Received shutdown request... [2020-09-11 16:20:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:20:15,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 16:20:15,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:20:15,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-09-11 16:20:15,323 WARN L544 AbstractCegarLoop]: Verification canceled [2020-09-11 16:20:15,329 WARN L228 ceAbstractionStarter]: Timeout [2020-09-11 16:20:15,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 04:20:15 BasicIcfg [2020-09-11 16:20:15,329 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-11 16:20:15,331 INFO L168 Benchmark]: Toolchain (without parser) took 248354.32 ms. Allocated memory was 145.8 MB in the beginning and 170.9 MB in the end (delta: 25.2 MB). Free memory was 100.7 MB in the beginning and 113.6 MB in the end (delta: -12.9 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-09-11 16:20:15,332 INFO L168 Benchmark]: CDTParser took 1.18 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-09-11 16:20:15,332 INFO L168 Benchmark]: CACSL2BoogieTranslator took 789.58 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 100.0 MB in the beginning and 161.8 MB in the end (delta: -61.8 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. [2020-09-11 16:20:15,333 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.29 ms. Allocated memory is still 202.4 MB. Free memory was 161.2 MB in the beginning and 159.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-11 16:20:15,333 INFO L168 Benchmark]: Boogie Preprocessor took 35.92 ms. Allocated memory is still 202.4 MB. Free memory was 159.2 MB in the beginning and 157.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-11 16:20:15,333 INFO L168 Benchmark]: RCFGBuilder took 478.92 ms. Allocated memory is still 202.4 MB. Free memory was 157.8 MB in the beginning and 137.7 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-09-11 16:20:15,334 INFO L168 Benchmark]: TraceAbstraction took 246982.47 ms. Allocated memory was 202.4 MB in the beginning and 170.9 MB in the end (delta: -31.5 MB). Free memory was 137.0 MB in the beginning and 113.6 MB in the end (delta: 23.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-11 16:20:15,336 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.18 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 789.58 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 100.0 MB in the beginning and 161.8 MB in the end (delta: -61.8 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 56.29 ms. Allocated memory is still 202.4 MB. Free memory was 161.2 MB in the beginning and 159.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.92 ms. Allocated memory is still 202.4 MB. Free memory was 159.2 MB in the beginning and 157.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 478.92 ms. Allocated memory is still 202.4 MB. Free memory was 157.8 MB in the beginning and 137.7 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 246982.47 ms. Allocated memory was 202.4 MB in the beginning and 170.9 MB in the end (delta: -31.5 MB). Free memory was 137.0 MB in the beginning and 113.6 MB in the end (delta: 23.4 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 703]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 703). Cancelled while BasicCegarLoop was analyzing trace of length 28 with TraceHistMax 10,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 246.8s, OverallIterations: 201, TraceHistogramMax: 10, AutomataDifference: 138.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 3184 SDtfs, 10965 SDslu, 19907 SDs, 0 SdLazy, 21474 SolverSat, 11928 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10471 GetRequests, 3473 SyntacticMatches, 195 SemanticMatches, 6803 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62853 ImplicationChecksByTransitivity, 140.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=195, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 200 MinimizatonAttempts, 4730 StatesRemovedByMinimization, 199 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.8s SsaConstructionTime, 5.9s SatisfiabilityAnalysisTime, 49.4s InterpolantComputationTime, 7982 NumberOfCodeBlocks, 7982 NumberOfCodeBlocksAsserted, 994 NumberOfCheckSat, 7587 ConstructedInterpolants, 0 QuantifiedInterpolants, 694591 SizeOfPredicates, 2409 NumberOfNonLiveVariables, 24525 ConjunctsInSsa, 3194 ConjunctsInUnsatCore, 395 InterpolantComputations, 5 PerfectInterpolantSequences, 0/14334 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