/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-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 11:41:37,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 11:41:37,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 11:41:37,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 11:41:37,041 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 11:41:37,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 11:41:37,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 11:41:37,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 11:41:37,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 11:41:37,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 11:41:37,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 11:41:37,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 11:41:37,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 11:41:37,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 11:41:37,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 11:41:37,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 11:41:37,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 11:41:37,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 11:41:37,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 11:41:37,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 11:41:37,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 11:41:37,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 11:41:37,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 11:41:37,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 11:41:37,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 11:41:37,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 11:41:37,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 11:41:37,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 11:41:37,074 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 11:41:37,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 11:41:37,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 11:41:37,076 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 11:41:37,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 11:41:37,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 11:41:37,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 11:41:37,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 11:41:37,079 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 [2020-10-16 11:41:37,104 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 11:41:37,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 11:41:37,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 11:41:37,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 11:41:37,107 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 11:41:37,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 11:41:37,107 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 11:41:37,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 11:41:37,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 11:41:37,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 11:41:37,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 11:41:37,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 11:41:37,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 11:41:37,108 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 11:41:37,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 11:41:37,109 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 11:41:37,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 11:41:37,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 11:41:37,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 11:41:37,110 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 11:41:37,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 11:41:37,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 11:41:37,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 11:41:37,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-16 11:41:37,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 11:41:37,111 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 11:41:37,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 11:41:37,111 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-16 11:41:37,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 11:41:37,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 11:41:37,499 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 11:41:37,503 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 11:41:37,505 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 11:41:37,506 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 11:41:37,506 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-10-16 11:41:37,577 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/849aba7c0/27a0fab18fb942f18e01603e01fbfe3e/FLAG28b2c77c2 [2020-10-16 11:41:38,200 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 11:41:38,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-10-16 11:41:38,224 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/849aba7c0/27a0fab18fb942f18e01603e01fbfe3e/FLAG28b2c77c2 [2020-10-16 11:41:38,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/849aba7c0/27a0fab18fb942f18e01603e01fbfe3e [2020-10-16 11:41:38,448 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 11:41:38,453 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 11:41:38,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 11:41:38,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 11:41:38,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 11:41:38,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:41:38" (1/1) ... [2020-10-16 11:41:38,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d47e419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:38, skipping insertion in model container [2020-10-16 11:41:38,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:41:38" (1/1) ... [2020-10-16 11:41:38,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 11:41:38,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 11:41:39,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:41:39,070 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 11:41:39,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:41:39,193 INFO L208 MainTranslator]: Completed translation [2020-10-16 11:41:39,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:39 WrapperNode [2020-10-16 11:41:39,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 11:41:39,195 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 11:41:39,195 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 11:41:39,195 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 11:41:39,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:39" (1/1) ... [2020-10-16 11:41:39,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:39" (1/1) ... [2020-10-16 11:41:39,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 11:41:39,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 11:41:39,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 11:41:39,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 11:41:39,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:39" (1/1) ... [2020-10-16 11:41:39,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:39" (1/1) ... [2020-10-16 11:41:39,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:39" (1/1) ... [2020-10-16 11:41:39,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:39" (1/1) ... [2020-10-16 11:41:39,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:39" (1/1) ... [2020-10-16 11:41:39,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:39" (1/1) ... [2020-10-16 11:41:39,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:39" (1/1) ... [2020-10-16 11:41:39,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 11:41:39,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 11:41:39,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 11:41:39,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 11:41:39,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:39" (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 [2020-10-16 11:41:39,364 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-16 11:41:39,364 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-16 11:41:39,364 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-16 11:41:39,364 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-16 11:41:39,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 11:41:39,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 11:41:39,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 11:41:39,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 11:41:39,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 11:41:39,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 11:41:39,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 11:41:39,367 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 11:41:39,687 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 11:41:39,687 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 11:41:39,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:41:39 BoogieIcfgContainer [2020-10-16 11:41:39,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 11:41:39,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 11:41:39,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 11:41:39,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 11:41:39,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 11:41:38" (1/3) ... [2020-10-16 11:41:39,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d0f199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:41:39, skipping insertion in model container [2020-10-16 11:41:39,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:39" (2/3) ... [2020-10-16 11:41:39,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d0f199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:41:39, skipping insertion in model container [2020-10-16 11:41:39,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:41:39" (3/3) ... [2020-10-16 11:41:39,704 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2020-10-16 11:41:39,722 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 11:41:39,723 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-16 11:41:39,732 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 11:41:39,734 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 11:41:39,784 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,784 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,784 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,784 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,785 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,785 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,786 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,791 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,793 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,794 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,794 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,795 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,795 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,795 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,796 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,796 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,797 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,797 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,797 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,798 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,798 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,798 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,799 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,803 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,804 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,804 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,804 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,805 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,814 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,815 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,815 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,815 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,816 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,818 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,830 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,830 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,830 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,831 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,831 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,831 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:39,834 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-16 11:41:39,847 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 11:41:39,867 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 11:41:39,867 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 11:41:39,868 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 11:41:39,868 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 11:41:39,868 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 11:41:39,868 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 11:41:39,868 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 11:41:39,868 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 11:41:39,881 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 11:41:39,881 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-16 11:41:39,884 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-16 11:41:39,886 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-16 11:41:39,931 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-16 11:41:39,931 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 11:41:39,938 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. [2020-10-16 11:41:39,940 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-16 11:41:41,025 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-16 11:41:41,292 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-16 11:41:41,293 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-16 11:41:41,302 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-16 11:41:41,318 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-16 11:41:41,321 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-16 11:41:41,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-16 11:41:41,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:41,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-16 11:41:41,333 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:41,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:41,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-16 11:41:41,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:41,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982827887] [2020-10-16 11:41:41,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:41,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:41,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982827887] [2020-10-16 11:41:41,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:41,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 11:41:41,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913295790] [2020-10-16 11:41:41,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 11:41:41,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:41,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 11:41:41,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 11:41:41,765 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-16 11:41:41,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:41,871 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-16 11:41:41,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:41:41,874 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-16 11:41:41,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:41,892 INFO L225 Difference]: With dead ends: 75 [2020-10-16 11:41:41,893 INFO L226 Difference]: Without dead ends: 42 [2020-10-16 11:41:41,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:41:41,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-16 11:41:41,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-16 11:41:41,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 11:41:41,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-16 11:41:41,954 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-16 11:41:41,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:41,955 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-16 11:41:41,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 11:41:41,955 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-16 11:41:41,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 11:41:41,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:41,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:41,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 11:41:41,957 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:41,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:41,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-16 11:41:41,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:41,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910273754] [2020-10-16 11:41:41,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:42,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910273754] [2020-10-16 11:41:42,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:42,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:41:42,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903722043] [2020-10-16 11:41:42,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 11:41:42,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:42,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 11:41:42,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:41:42,073 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-16 11:41:42,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:42,114 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-16 11:41:42,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 11:41:42,115 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 11:41:42,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:42,116 INFO L225 Difference]: With dead ends: 56 [2020-10-16 11:41:42,117 INFO L226 Difference]: Without dead ends: 50 [2020-10-16 11:41:42,118 INFO L677 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 [2020-10-16 11:41:42,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-16 11:41:42,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-16 11:41:42,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 11:41:42,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-16 11:41:42,127 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-16 11:41:42,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:42,129 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-16 11:41:42,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 11:41:42,130 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-16 11:41:42,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:41:42,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:42,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:42,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 11:41:42,132 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:42,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:42,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-16 11:41:42,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:42,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481212890] [2020-10-16 11:41:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:42,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481212890] [2020-10-16 11:41:42,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:42,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:41:42,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507317540] [2020-10-16 11:41:42,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:41:42,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:42,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:41:42,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:41:42,232 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-16 11:41:42,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:42,329 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-16 11:41:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:41:42,330 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:41:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:42,332 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:41:42,332 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 11:41:42,333 INFO L677 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 [2020-10-16 11:41:42,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 11:41:42,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-16 11:41:42,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-16 11:41:42,344 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-16 11:41:42,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:42,344 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-16 11:41:42,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:41:42,345 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-16 11:41:42,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:41:42,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:42,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:42,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 11:41:42,347 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:42,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:42,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-16 11:41:42,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:42,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765893083] [2020-10-16 11:41:42,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:42,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765893083] [2020-10-16 11:41:42,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:42,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:41:42,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015866274] [2020-10-16 11:41:42,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:41:42,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:42,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:41:42,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:41:42,438 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-16 11:41:42,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:42,535 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-16 11:41:42,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:41:42,536 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:41:42,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:42,537 INFO L225 Difference]: With dead ends: 54 [2020-10-16 11:41:42,537 INFO L226 Difference]: Without dead ends: 43 [2020-10-16 11:41:42,538 INFO L677 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 [2020-10-16 11:41:42,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-16 11:41:42,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-16 11:41:42,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 11:41:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-16 11:41:42,544 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-16 11:41:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:42,544 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-16 11:41:42,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:41:42,544 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-16 11:41:42,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:41:42,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:42,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:42,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 11:41:42,546 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:42,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:42,546 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-16 11:41:42,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:42,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264661632] [2020-10-16 11:41:42,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:42,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264661632] [2020-10-16 11:41:42,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:42,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:41:42,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093487426] [2020-10-16 11:41:42,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:41:42,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:42,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:41:42,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:41:42,614 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-16 11:41:42,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:42,700 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-16 11:41:42,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:41:42,701 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:41:42,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:42,702 INFO L225 Difference]: With dead ends: 57 [2020-10-16 11:41:42,703 INFO L226 Difference]: Without dead ends: 51 [2020-10-16 11:41:42,703 INFO L677 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 [2020-10-16 11:41:42,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-16 11:41:42,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-16 11:41:42,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 11:41:42,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-16 11:41:42,710 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-16 11:41:42,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:42,710 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-16 11:41:42,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:41:42,710 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-16 11:41:42,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:42,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:42,712 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:42,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 11:41:42,712 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:42,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:42,713 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-16 11:41:42,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:42,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673683494] [2020-10-16 11:41:42,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:42,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673683494] [2020-10-16 11:41:42,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503380658] [2020-10-16 11:41:42,786 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 [2020-10-16 11:41:42,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:42,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:42,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:41:42,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:42,944 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:42,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:42,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 11:41:42,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856495027] [2020-10-16 11:41:42,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:42,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:42,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:42,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:42,964 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-16 11:41:43,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:43,104 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-16 11:41:43,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:41:43,105 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 11:41:43,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:43,106 INFO L225 Difference]: With dead ends: 48 [2020-10-16 11:41:43,107 INFO L226 Difference]: Without dead ends: 43 [2020-10-16 11:41:43,107 INFO L677 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 [2020-10-16 11:41:43,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-16 11:41:43,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-16 11:41:43,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 11:41:43,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-16 11:41:43,113 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-16 11:41:43,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:43,113 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-16 11:41:43,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:43,113 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-16 11:41:43,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:43,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:43,114 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:43,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-16 11:41:43,328 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:43,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:43,329 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-16 11:41:43,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:43,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503876257] [2020-10-16 11:41:43,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:43,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503876257] [2020-10-16 11:41:43,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495806201] [2020-10-16 11:41:43,454 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 [2020-10-16 11:41:43,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:43,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:43,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:41:43,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:43,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:43,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 11:41:43,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557184795] [2020-10-16 11:41:43,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 11:41:43,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:43,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 11:41:43,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:41:43,534 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-16 11:41:43,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:43,603 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-16 11:41:43,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:41:43,603 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-16 11:41:43,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:43,604 INFO L225 Difference]: With dead ends: 54 [2020-10-16 11:41:43,604 INFO L226 Difference]: Without dead ends: 48 [2020-10-16 11:41:43,605 INFO L677 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 [2020-10-16 11:41:43,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-16 11:41:43,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-16 11:41:43,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 11:41:43,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-16 11:41:43,612 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-16 11:41:43,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:43,612 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-16 11:41:43,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 11:41:43,612 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-16 11:41:43,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:43,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:43,613 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:43,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:43,827 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:43,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:43,828 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-16 11:41:43,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:43,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882134338] [2020-10-16 11:41:43,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:43,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:43,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882134338] [2020-10-16 11:41:43,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573977429] [2020-10-16 11:41:43,922 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 [2020-10-16 11:41:43,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:41:43,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:43,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:41:43,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:44,013 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:44,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:44,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 11:41:44,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088984256] [2020-10-16 11:41:44,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:44,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:44,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:44,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:44,039 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-16 11:41:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:44,156 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-16 11:41:44,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:41:44,157 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 11:41:44,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:44,158 INFO L225 Difference]: With dead ends: 58 [2020-10-16 11:41:44,159 INFO L226 Difference]: Without dead ends: 52 [2020-10-16 11:41:44,160 INFO L677 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 [2020-10-16 11:41:44,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-16 11:41:44,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-16 11:41:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 11:41:44,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-16 11:41:44,174 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-16 11:41:44,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:44,174 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-16 11:41:44,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:44,175 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-16 11:41:44,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:44,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:44,175 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:44,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:44,393 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:44,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:44,394 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-16 11:41:44,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:44,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590487144] [2020-10-16 11:41:44,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:44,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590487144] [2020-10-16 11:41:44,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124661429] [2020-10-16 11:41:44,473 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 [2020-10-16 11:41:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:44,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:41:44,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:44,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:44,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:44,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 11:41:44,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426844000] [2020-10-16 11:41:44,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 11:41:44,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:44,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 11:41:44,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:41:44,573 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-16 11:41:44,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:44,758 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-16 11:41:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:44,760 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-16 11:41:44,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:44,761 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:41:44,761 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 11:41:44,761 INFO L677 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 [2020-10-16 11:41:44,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 11:41:44,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-16 11:41:44,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:44,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-16 11:41:44,780 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-16 11:41:44,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:44,781 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-16 11:41:44,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 11:41:44,781 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-16 11:41:44,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:44,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:44,782 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:44,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:44,996 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:44,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:44,996 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-16 11:41:44,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:44,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495863083] [2020-10-16 11:41:44,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:45,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495863083] [2020-10-16 11:41:45,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768751527] [2020-10-16 11:41:45,055 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 [2020-10-16 11:41:45,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:45,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:45,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:45,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:45,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:45,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 11:41:45,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248479260] [2020-10-16 11:41:45,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:45,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:45,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:45,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:45,145 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-16 11:41:45,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:45,340 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-16 11:41:45,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:45,341 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 11:41:45,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:45,342 INFO L225 Difference]: With dead ends: 62 [2020-10-16 11:41:45,342 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 11:41:45,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:41:45,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 11:41:45,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-16 11:41:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-16 11:41:45,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-16 11:41:45,349 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-16 11:41:45,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:45,350 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-16 11:41:45,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:45,352 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-16 11:41:45,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:45,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:45,353 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:45,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-16 11:41:45,555 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:45,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:45,555 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-16 11:41:45,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:45,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897742293] [2020-10-16 11:41:45,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:45,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897742293] [2020-10-16 11:41:45,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48189128] [2020-10-16 11:41:45,669 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 [2020-10-16 11:41:45,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:41:45,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:45,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:45,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:45,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:45,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 11:41:45,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153094577] [2020-10-16 11:41:45,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:45,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:45,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:45,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:45,754 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-16 11:41:45,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:45,865 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-16 11:41:45,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:41:45,865 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-16 11:41:45,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:45,866 INFO L225 Difference]: With dead ends: 64 [2020-10-16 11:41:45,866 INFO L226 Difference]: Without dead ends: 58 [2020-10-16 11:41:45,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:41:45,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-16 11:41:45,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-16 11:41:45,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-16 11:41:45,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-16 11:41:45,872 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-16 11:41:45,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:45,872 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-16 11:41:45,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:45,873 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-16 11:41:45,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:45,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:45,874 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:46,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:46,085 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:46,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:46,086 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-16 11:41:46,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:46,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935074880] [2020-10-16 11:41:46,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:46,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:46,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935074880] [2020-10-16 11:41:46,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895761998] [2020-10-16 11:41:46,148 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 [2020-10-16 11:41:46,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:46,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:46,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:46,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:46,209 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:46,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:46,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 11:41:46,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137725869] [2020-10-16 11:41:46,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:46,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:46,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:46,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:46,232 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-16 11:41:46,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:46,390 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-16 11:41:46,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:46,390 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 11:41:46,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:46,391 INFO L225 Difference]: With dead ends: 61 [2020-10-16 11:41:46,391 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 11:41:46,392 INFO L677 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 [2020-10-16 11:41:46,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 11:41:46,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-16 11:41:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 11:41:46,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-16 11:41:46,397 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-16 11:41:46,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:46,397 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-16 11:41:46,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:46,398 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-16 11:41:46,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:46,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:46,399 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:46,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:46,609 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:46,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:46,610 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-16 11:41:46,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:46,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576624278] [2020-10-16 11:41:46,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:46,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576624278] [2020-10-16 11:41:46,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74601856] [2020-10-16 11:41:46,688 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 [2020-10-16 11:41:46,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:46,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:46,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:46,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:46,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:46,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 11:41:46,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692088796] [2020-10-16 11:41:46,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:46,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:46,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:46,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:46,768 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-16 11:41:46,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:46,935 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-16 11:41:46,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:46,936 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-16 11:41:46,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:46,938 INFO L225 Difference]: With dead ends: 77 [2020-10-16 11:41:46,938 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 11:41:46,939 INFO L677 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 [2020-10-16 11:41:46,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 11:41:46,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-16 11:41:46,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 11:41:46,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-16 11:41:46,944 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-16 11:41:46,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:46,944 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-16 11:41:46,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:46,945 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-16 11:41:46,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:46,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:46,946 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:47,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 11:41:47,161 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:47,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:47,162 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-16 11:41:47,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:47,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413837455] [2020-10-16 11:41:47,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:47,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413837455] [2020-10-16 11:41:47,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878656131] [2020-10-16 11:41:47,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:41:47,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:41:47,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:47,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:47,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:47,335 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:47,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:47,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 11:41:47,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332175159] [2020-10-16 11:41:47,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:47,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:47,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:47,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:47,356 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-16 11:41:47,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:47,635 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-10-16 11:41:47,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:47,637 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 11:41:47,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:47,638 INFO L225 Difference]: With dead ends: 58 [2020-10-16 11:41:47,638 INFO L226 Difference]: Without dead ends: 50 [2020-10-16 11:41:47,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:41:47,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-16 11:41:47,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-16 11:41:47,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-16 11:41:47,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-16 11:41:47,645 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-16 11:41:47,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:47,645 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-16 11:41:47,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:47,645 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-16 11:41:47,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:47,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:47,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:47,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:47,850 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:47,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:47,851 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-16 11:41:47,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:47,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595873088] [2020-10-16 11:41:47,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:47,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595873088] [2020-10-16 11:41:47,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599940334] [2020-10-16 11:41:47,911 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 [2020-10-16 11:41:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:47,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:47,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:48,004 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:48,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:48,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 11:41:48,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756914664] [2020-10-16 11:41:48,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:48,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:48,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:48,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:48,021 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-16 11:41:48,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:48,226 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-16 11:41:48,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:48,226 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 11:41:48,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:48,228 INFO L225 Difference]: With dead ends: 60 [2020-10-16 11:41:48,228 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 11:41:48,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:41:48,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 11:41:48,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-16 11:41:48,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:48,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-16 11:41:48,233 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-16 11:41:48,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:48,233 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-16 11:41:48,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:48,234 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-16 11:41:48,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:48,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:48,235 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:48,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 11:41:48,447 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:48,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:48,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-16 11:41:48,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:48,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209831058] [2020-10-16 11:41:48,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:48,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209831058] [2020-10-16 11:41:48,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340322961] [2020-10-16 11:41:48,534 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 [2020-10-16 11:41:48,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:48,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:48,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:48,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:48,633 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:48,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:48,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 11:41:48,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726542000] [2020-10-16 11:41:48,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:48,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:48,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:48,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:48,655 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-16 11:41:48,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:48,870 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-16 11:41:48,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:48,871 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 11:41:48,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:48,872 INFO L225 Difference]: With dead ends: 54 [2020-10-16 11:41:48,873 INFO L226 Difference]: Without dead ends: 49 [2020-10-16 11:41:48,873 INFO L677 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 [2020-10-16 11:41:48,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-16 11:41:48,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-16 11:41:48,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-16 11:41:48,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-16 11:41:48,877 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-16 11:41:48,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:48,878 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-16 11:41:48,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:48,878 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-16 11:41:48,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:48,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:48,879 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:49,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 11:41:49,090 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:49,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:49,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-16 11:41:49,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:49,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292800912] [2020-10-16 11:41:49,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:49,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292800912] [2020-10-16 11:41:49,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572017755] [2020-10-16 11:41:49,186 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 [2020-10-16 11:41:49,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:49,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:49,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:49,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:49,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:49,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 11:41:49,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608729157] [2020-10-16 11:41:49,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:49,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:49,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:49,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:49,255 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-16 11:41:49,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:49,355 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-16 11:41:49,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:41:49,356 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 11:41:49,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:49,356 INFO L225 Difference]: With dead ends: 60 [2020-10-16 11:41:49,356 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 11:41:49,357 INFO L677 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 [2020-10-16 11:41:49,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 11:41:49,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-16 11:41:49,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:49,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-16 11:41:49,361 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-16 11:41:49,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:49,361 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-16 11:41:49,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:49,361 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-16 11:41:49,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:49,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:49,362 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:49,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 11:41:49,571 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:49,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:49,572 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-16 11:41:49,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:49,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9453930] [2020-10-16 11:41:49,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:49,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9453930] [2020-10-16 11:41:49,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284177401] [2020-10-16 11:41:49,647 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 [2020-10-16 11:41:49,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:49,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:49,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:49,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:49,717 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:49,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:49,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 11:41:49,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858019652] [2020-10-16 11:41:49,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:49,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:49,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:49,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:49,736 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-16 11:41:49,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:49,873 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-16 11:41:49,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:49,876 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 11:41:49,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:49,876 INFO L225 Difference]: With dead ends: 66 [2020-10-16 11:41:49,877 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 11:41:49,877 INFO L677 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 [2020-10-16 11:41:49,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 11:41:49,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-16 11:41:49,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 11:41:49,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-16 11:41:49,881 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-16 11:41:49,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:49,881 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-16 11:41:49,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:49,881 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-16 11:41:49,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:49,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:49,882 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:50,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 11:41:50,087 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:50,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:50,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-16 11:41:50,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:50,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557640559] [2020-10-16 11:41:50,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:50,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557640559] [2020-10-16 11:41:50,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624899409] [2020-10-16 11:41:50,166 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 [2020-10-16 11:41:50,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:41:50,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:50,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:50,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:50,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:50,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 11:41:50,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671774100] [2020-10-16 11:41:50,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:50,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:50,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:50,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:50,292 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-16 11:41:50,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:50,443 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-16 11:41:50,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:41:50,443 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 11:41:50,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:50,445 INFO L225 Difference]: With dead ends: 67 [2020-10-16 11:41:50,445 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 11:41:50,445 INFO L677 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 [2020-10-16 11:41:50,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 11:41:50,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-16 11:41:50,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-16 11:41:50,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-16 11:41:50,448 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-16 11:41:50,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:50,448 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-16 11:41:50,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:50,449 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-16 11:41:50,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:50,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:50,449 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:50,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:50,651 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:50,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:50,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-16 11:41:50,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:50,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927745268] [2020-10-16 11:41:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:50,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927745268] [2020-10-16 11:41:50,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289935084] [2020-10-16 11:41:50,731 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 [2020-10-16 11:41:50,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:41:50,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:50,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:50,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:50,811 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:50,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:50,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 11:41:50,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37245769] [2020-10-16 11:41:50,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:50,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:50,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:50,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:50,837 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-16 11:41:51,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:51,046 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-16 11:41:51,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:51,047 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 11:41:51,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:51,048 INFO L225 Difference]: With dead ends: 69 [2020-10-16 11:41:51,048 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 11:41:51,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:41:51,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 11:41:51,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-16 11:41:51,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:51,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-16 11:41:51,051 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-16 11:41:51,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:51,051 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-16 11:41:51,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:51,051 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-16 11:41:51,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:51,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:51,052 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:51,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:51,261 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:51,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:51,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-16 11:41:51,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:51,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323210931] [2020-10-16 11:41:51,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:51,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323210931] [2020-10-16 11:41:51,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198170063] [2020-10-16 11:41:51,319 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 [2020-10-16 11:41:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:51,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:51,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:51,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:51,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 11:41:51,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148733517] [2020-10-16 11:41:51,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:51,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:51,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:51,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:51,397 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-16 11:41:51,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:51,610 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-16 11:41:51,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:51,614 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 11:41:51,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:51,615 INFO L225 Difference]: With dead ends: 88 [2020-10-16 11:41:51,615 INFO L226 Difference]: Without dead ends: 82 [2020-10-16 11:41:51,616 INFO L677 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 [2020-10-16 11:41:51,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-16 11:41:51,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-16 11:41:51,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 11:41:51,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-16 11:41:51,619 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-16 11:41:51,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:51,619 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-16 11:41:51,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:51,620 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-16 11:41:51,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:51,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:51,620 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:51,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:51,823 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:51,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:51,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-16 11:41:51,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:51,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027455138] [2020-10-16 11:41:51,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:51,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027455138] [2020-10-16 11:41:51,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491428592] [2020-10-16 11:41:51,907 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 [2020-10-16 11:41:51,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:51,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:51,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:51,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:51,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:52,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 11:41:52,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655727464] [2020-10-16 11:41:52,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:52,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:52,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:52,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:52,013 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-16 11:41:52,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:52,296 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-16 11:41:52,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:52,296 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 11:41:52,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:52,297 INFO L225 Difference]: With dead ends: 69 [2020-10-16 11:41:52,297 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 11:41:52,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:41:52,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 11:41:52,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-16 11:41:52,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 11:41:52,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-16 11:41:52,302 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-16 11:41:52,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:52,302 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-16 11:41:52,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:52,302 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-16 11:41:52,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:52,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:52,303 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:52,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 11:41:52,514 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:52,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:52,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-16 11:41:52,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:52,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970898264] [2020-10-16 11:41:52,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:52,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970898264] [2020-10-16 11:41:52,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625896598] [2020-10-16 11:41:52,590 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 [2020-10-16 11:41:52,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:52,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:52,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:52,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:52,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:52,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 11:41:52,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961396758] [2020-10-16 11:41:52,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:52,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:52,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:52,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:52,657 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-16 11:41:52,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:52,792 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-16 11:41:52,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:52,792 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 11:41:52,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:52,793 INFO L225 Difference]: With dead ends: 74 [2020-10-16 11:41:52,794 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 11:41:52,794 INFO L677 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 [2020-10-16 11:41:52,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 11:41:52,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-16 11:41:52,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 11:41:52,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 11:41:52,798 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-16 11:41:52,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:52,798 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 11:41:52,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:52,798 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 11:41:52,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:52,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:52,799 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:53,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 11:41:53,009 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:53,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:53,009 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-16 11:41:53,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:53,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436260758] [2020-10-16 11:41:53,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:53,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436260758] [2020-10-16 11:41:53,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532196244] [2020-10-16 11:41:53,095 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 [2020-10-16 11:41:53,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:53,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:53,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:53,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:53,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:53,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:53,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 11:41:53,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862418140] [2020-10-16 11:41:53,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:53,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:53,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:53,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:53,188 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-16 11:41:53,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:53,385 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-16 11:41:53,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:53,388 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 11:41:53,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:53,390 INFO L225 Difference]: With dead ends: 71 [2020-10-16 11:41:53,390 INFO L226 Difference]: Without dead ends: 65 [2020-10-16 11:41:53,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:41:53,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-16 11:41:53,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-16 11:41:53,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:41:53,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 11:41:53,393 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-16 11:41:53,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:53,393 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 11:41:53,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:53,394 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 11:41:53,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:53,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:53,394 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:53,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-16 11:41:53,602 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:53,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:53,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-16 11:41:53,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:53,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898877065] [2020-10-16 11:41:53,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:53,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898877065] [2020-10-16 11:41:53,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662393134] [2020-10-16 11:41:53,675 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 [2020-10-16 11:41:53,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:41:53,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:53,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:53,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:53,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:53,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 11:41:53,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797532851] [2020-10-16 11:41:53,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:53,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:53,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:53,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:53,741 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-16 11:41:53,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:53,939 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-16 11:41:53,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:41:53,939 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 11:41:53,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:53,941 INFO L225 Difference]: With dead ends: 68 [2020-10-16 11:41:53,941 INFO L226 Difference]: Without dead ends: 62 [2020-10-16 11:41:53,942 INFO L677 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 [2020-10-16 11:41:53,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-16 11:41:53,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-16 11:41:53,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 11:41:53,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 11:41:53,945 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-16 11:41:53,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:53,945 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 11:41:53,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:53,945 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 11:41:53,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:53,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:53,946 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:54,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-16 11:41:54,158 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:54,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:54,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-16 11:41:54,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:54,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459843011] [2020-10-16 11:41:54,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:54,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:54,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459843011] [2020-10-16 11:41:54,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448221582] [2020-10-16 11:41:54,250 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 [2020-10-16 11:41:54,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:41:54,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:54,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:54,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:54,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:54,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:54,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 11:41:54,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513175552] [2020-10-16 11:41:54,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:54,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:54,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:54,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:54,355 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-16 11:41:54,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:54,627 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-16 11:41:54,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:54,627 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 11:41:54,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:54,628 INFO L225 Difference]: With dead ends: 67 [2020-10-16 11:41:54,628 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 11:41:54,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:41:54,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 11:41:54,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-16 11:41:54,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:41:54,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 11:41:54,632 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-16 11:41:54,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:54,633 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 11:41:54,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:54,633 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 11:41:54,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:54,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:54,633 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:54,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 11:41:54,838 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:54,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:54,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-16 11:41:54,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:54,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515417590] [2020-10-16 11:41:54,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:54,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515417590] [2020-10-16 11:41:54,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266688647] [2020-10-16 11:41:54,917 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 [2020-10-16 11:41:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:54,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:54,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:54,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:54,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 11:41:54,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069913812] [2020-10-16 11:41:54,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:54,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:54,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:54,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:54,989 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-16 11:41:55,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:55,234 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-16 11:41:55,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:55,235 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 11:41:55,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:55,235 INFO L225 Difference]: With dead ends: 83 [2020-10-16 11:41:55,235 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 11:41:55,236 INFO L677 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 [2020-10-16 11:41:55,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 11:41:55,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-16 11:41:55,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 11:41:55,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-16 11:41:55,239 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-16 11:41:55,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:55,239 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-16 11:41:55,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:55,240 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-16 11:41:55,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:55,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:55,240 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:55,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:55,444 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:55,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:55,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-16 11:41:55,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:55,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790028061] [2020-10-16 11:41:55,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:55,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:55,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790028061] [2020-10-16 11:41:55,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39944205] [2020-10-16 11:41:55,519 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 [2020-10-16 11:41:55,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:55,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:55,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:55,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:55,588 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:55,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:55,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 11:41:55,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000982477] [2020-10-16 11:41:55,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:55,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:55,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:55,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:55,604 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-16 11:41:55,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:55,946 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-16 11:41:55,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:41:55,946 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 11:41:55,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:55,947 INFO L225 Difference]: With dead ends: 64 [2020-10-16 11:41:55,947 INFO L226 Difference]: Without dead ends: 56 [2020-10-16 11:41:55,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:55,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-16 11:41:55,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-10-16 11:41:55,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-16 11:41:55,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-16 11:41:55,951 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-16 11:41:55,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:55,951 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-16 11:41:55,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:55,951 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-16 11:41:55,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:55,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:55,952 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:56,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 11:41:56,153 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:56,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:56,154 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-16 11:41:56,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:56,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969585230] [2020-10-16 11:41:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:56,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969585230] [2020-10-16 11:41:56,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697991220] [2020-10-16 11:41:56,221 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 [2020-10-16 11:41:56,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:56,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:56,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:56,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:56,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:56,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:56,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 11:41:56,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902192422] [2020-10-16 11:41:56,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:56,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:56,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:56,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:56,313 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-16 11:41:56,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:56,607 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-16 11:41:56,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:56,608 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 11:41:56,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:56,609 INFO L225 Difference]: With dead ends: 68 [2020-10-16 11:41:56,609 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 11:41:56,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:56,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 11:41:56,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-16 11:41:56,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 11:41:56,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-16 11:41:56,613 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-16 11:41:56,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:56,613 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-16 11:41:56,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:56,614 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-16 11:41:56,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:56,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:56,614 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:56,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 11:41:56,824 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:56,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:56,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-16 11:41:56,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:56,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259225000] [2020-10-16 11:41:56,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:56,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259225000] [2020-10-16 11:41:56,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433638257] [2020-10-16 11:41:56,902 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 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 [2020-10-16 11:41:56,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:56,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:56,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:56,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:56,963 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:56,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:56,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:41:56,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763016556] [2020-10-16 11:41:56,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:56,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:56,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:56,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:56,975 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-16 11:41:57,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:57,286 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-16 11:41:57,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:57,287 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:41:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:57,288 INFO L225 Difference]: With dead ends: 60 [2020-10-16 11:41:57,289 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 11:41:57,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:41:57,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 11:41:57,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-16 11:41:57,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 11:41:57,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-16 11:41:57,291 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-16 11:41:57,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:57,292 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-16 11:41:57,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:57,292 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-16 11:41:57,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:57,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:57,293 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:57,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:57,500 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:57,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:57,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-16 11:41:57,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:57,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37100839] [2020-10-16 11:41:57,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:57,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37100839] [2020-10-16 11:41:57,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787724095] [2020-10-16 11:41:57,591 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 [2020-10-16 11:41:57,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 11:41:57,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:57,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:57,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:57,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:57,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 11:41:57,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603172571] [2020-10-16 11:41:57,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:57,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:57,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:57,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:57,673 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-16 11:41:57,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:57,849 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-16 11:41:57,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:57,851 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 11:41:57,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:57,851 INFO L225 Difference]: With dead ends: 66 [2020-10-16 11:41:57,851 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 11:41:57,852 INFO L677 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 [2020-10-16 11:41:57,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 11:41:57,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-16 11:41:57,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:41:57,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-16 11:41:57,854 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-16 11:41:57,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:57,855 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-16 11:41:57,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-16 11:41:57,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:57,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:57,856 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:58,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:58,057 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:58,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:58,058 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-16 11:41:58,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:58,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293167019] [2020-10-16 11:41:58,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:58,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293167019] [2020-10-16 11:41:58,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88325218] [2020-10-16 11:41:58,133 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 [2020-10-16 11:41:58,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 11:41:58,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:58,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:58,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:58,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:58,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:58,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:58,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:41:58,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789176625] [2020-10-16 11:41:58,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:58,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:58,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:58,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:58,208 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-16 11:41:58,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:58,390 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-16 11:41:58,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:58,390 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:41:58,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:58,391 INFO L225 Difference]: With dead ends: 74 [2020-10-16 11:41:58,391 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 11:41:58,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:41:58,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 11:41:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-16 11:41:58,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 11:41:58,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-16 11:41:58,394 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-16 11:41:58,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:58,394 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-16 11:41:58,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:58,394 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-16 11:41:58,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:58,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:58,395 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:58,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-16 11:41:58,603 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:58,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:58,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-16 11:41:58,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:58,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804098600] [2020-10-16 11:41:58,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:58,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:58,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804098600] [2020-10-16 11:41:58,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378122052] [2020-10-16 11:41:58,680 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 [2020-10-16 11:41:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:58,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:58,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:58,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:58,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:58,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 11:41:58,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089042406] [2020-10-16 11:41:58,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:58,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:58,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:58,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:58,734 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-16 11:41:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:58,920 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-16 11:41:58,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:58,921 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 11:41:58,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:58,921 INFO L225 Difference]: With dead ends: 75 [2020-10-16 11:41:58,922 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 11:41:58,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:41:58,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 11:41:58,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-16 11:41:58,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 11:41:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 11:41:58,925 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-16 11:41:58,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:58,925 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 11:41:58,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:58,925 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 11:41:58,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:58,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:58,926 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:59,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:59,135 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:59,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:59,135 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-16 11:41:59,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:59,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525118703] [2020-10-16 11:41:59,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:59,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525118703] [2020-10-16 11:41:59,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120389628] [2020-10-16 11:41:59,225 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 [2020-10-16 11:41:59,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:59,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:59,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:59,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:59,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:59,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:59,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:41:59,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433794195] [2020-10-16 11:41:59,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:59,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:59,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:59,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:59,306 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-16 11:41:59,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:59,560 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-16 11:41:59,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:59,562 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:41:59,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:59,563 INFO L225 Difference]: With dead ends: 79 [2020-10-16 11:41:59,563 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 11:41:59,563 INFO L677 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 [2020-10-16 11:41:59,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 11:41:59,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-16 11:41:59,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:41:59,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 11:41:59,566 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-16 11:41:59,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:59,566 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 11:41:59,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:59,566 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 11:41:59,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:59,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:59,567 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:59,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-16 11:41:59,767 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:59,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:59,768 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-16 11:41:59,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:59,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169908384] [2020-10-16 11:41:59,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:59,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169908384] [2020-10-16 11:41:59,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677066592] [2020-10-16 11:41:59,862 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 [2020-10-16 11:41:59,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:41:59,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:59,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:59,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:59,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:59,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 11:41:59,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572864944] [2020-10-16 11:41:59,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:59,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:59,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:59,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:59,935 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-16 11:42:00,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:00,158 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-16 11:42:00,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:42:00,160 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 11:42:00,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:00,161 INFO L225 Difference]: With dead ends: 79 [2020-10-16 11:42:00,161 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 11:42:00,162 INFO L677 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 [2020-10-16 11:42:00,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 11:42:00,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-16 11:42:00,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 11:42:00,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-16 11:42:00,164 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-16 11:42:00,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:00,164 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-16 11:42:00,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:42:00,165 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-16 11:42:00,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:42:00,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:00,165 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:00,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:00,366 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:00,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:00,367 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-16 11:42:00,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:00,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797901839] [2020-10-16 11:42:00,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:00,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797901839] [2020-10-16 11:42:00,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61858599] [2020-10-16 11:42:00,437 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 [2020-10-16 11:42:00,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:00,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:00,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:42:00,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:00,498 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:00,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:00,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:42:00,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096658633] [2020-10-16 11:42:00,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:42:00,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:00,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:42:00,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:42:00,508 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-16 11:42:00,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:00,850 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-16 11:42:00,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:42:00,851 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:42:00,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:00,852 INFO L225 Difference]: With dead ends: 76 [2020-10-16 11:42:00,852 INFO L226 Difference]: Without dead ends: 70 [2020-10-16 11:42:00,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:42:00,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-16 11:42:00,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-16 11:42:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 11:42:00,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-16 11:42:00,856 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-16 11:42:00,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:00,856 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-16 11:42:00,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:42:00,856 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-16 11:42:00,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:42:00,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:00,857 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:01,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-16 11:42:01,065 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:01,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:01,066 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-16 11:42:01,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:01,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138040589] [2020-10-16 11:42:01,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:01,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:01,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138040589] [2020-10-16 11:42:01,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525729107] [2020-10-16 11:42:01,135 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 [2020-10-16 11:42:01,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 11:42:01,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:01,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:42:01,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:01,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:01,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 11:42:01,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914386750] [2020-10-16 11:42:01,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:42:01,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:01,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:42:01,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:42:01,208 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-16 11:42:01,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:01,491 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-16 11:42:01,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:01,492 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 11:42:01,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:01,493 INFO L225 Difference]: With dead ends: 96 [2020-10-16 11:42:01,493 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 11:42:01,493 INFO L677 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 [2020-10-16 11:42:01,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 11:42:01,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-16 11:42:01,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:42:01,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-16 11:42:01,499 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-16 11:42:01,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:01,500 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-16 11:42:01,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:42:01,500 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-16 11:42:01,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:42:01,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:01,501 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:01,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 11:42:01,701 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:01,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:01,702 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-16 11:42:01,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:01,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162157581] [2020-10-16 11:42:01,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:01,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162157581] [2020-10-16 11:42:01,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232399257] [2020-10-16 11:42:01,775 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 [2020-10-16 11:42:01,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 11:42:01,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:01,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:42:01,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:01,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:01,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:42:01,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78659187] [2020-10-16 11:42:01,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:42:01,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:01,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:42:01,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:42:01,863 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-16 11:42:02,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:02,178 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-16 11:42:02,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:02,178 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:42:02,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:02,179 INFO L225 Difference]: With dead ends: 77 [2020-10-16 11:42:02,179 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 11:42:02,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:42:02,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 11:42:02,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-16 11:42:02,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 11:42:02,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-16 11:42:02,182 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-16 11:42:02,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:02,182 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-16 11:42:02,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:42:02,183 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-16 11:42:02,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:42:02,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:02,183 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:02,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-16 11:42:02,392 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:02,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:02,392 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-16 11:42:02,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:02,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070535334] [2020-10-16 11:42:02,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:02,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070535334] [2020-10-16 11:42:02,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261421838] [2020-10-16 11:42:02,502 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 [2020-10-16 11:42:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:02,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:42:02,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:02,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:02,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:02,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 11:42:02,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967201734] [2020-10-16 11:42:02,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:42:02,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:02,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:42:02,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:42:02,561 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-16 11:42:02,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:02,756 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-16 11:42:02,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:42:02,757 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 11:42:02,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:02,758 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:42:02,758 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 11:42:02,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:42:02,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 11:42:02,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-16 11:42:02,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:42:02,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 11:42:02,762 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 11:42:02,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:02,763 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 11:42:02,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:42:02,763 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 11:42:02,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:42:02,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:02,764 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:02,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 11:42:02,965 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:02,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:02,966 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-16 11:42:02,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:02,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77428167] [2020-10-16 11:42:02,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:03,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77428167] [2020-10-16 11:42:03,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634549455] [2020-10-16 11:42:03,099 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 [2020-10-16 11:42:03,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:03,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:03,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:42:03,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:03,204 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:03,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:03,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:42:03,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088545683] [2020-10-16 11:42:03,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:03,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:03,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:03,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:03,216 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 11:42:03,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:03,427 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-16 11:42:03,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:42:03,428 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:42:03,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:03,429 INFO L225 Difference]: With dead ends: 81 [2020-10-16 11:42:03,429 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 11:42:03,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:42:03,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 11:42:03,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-16 11:42:03,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:42:03,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 11:42:03,432 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 11:42:03,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:03,432 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 11:42:03,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:03,433 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 11:42:03,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:42:03,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:03,433 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:03,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 11:42:03,643 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:03,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:03,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-16 11:42:03,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:03,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373045979] [2020-10-16 11:42:03,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:03,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373045979] [2020-10-16 11:42:03,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730894153] [2020-10-16 11:42:03,722 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 [2020-10-16 11:42:03,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:42:03,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:03,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:42:03,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:03,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:03,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 11:42:03,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064279803] [2020-10-16 11:42:03,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:42:03,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:03,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:42:03,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:42:03,822 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 11:42:04,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:04,062 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-16 11:42:04,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:42:04,064 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 11:42:04,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:04,065 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:42:04,065 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 11:42:04,065 INFO L677 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 [2020-10-16 11:42:04,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 11:42:04,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-16 11:42:04,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:42:04,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 11:42:04,069 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 11:42:04,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:04,069 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 11:42:04,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:42:04,069 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 11:42:04,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:42:04,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:04,070 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:04,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-16 11:42:04,282 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:04,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:04,282 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-16 11:42:04,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:04,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494106540] [2020-10-16 11:42:04,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:04,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:04,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:04,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494106540] [2020-10-16 11:42:04,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897245158] [2020-10-16 11:42:04,377 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 [2020-10-16 11:42:04,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:04,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:04,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:42:04,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:04,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:04,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:04,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:42:04,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162456352] [2020-10-16 11:42:04,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:04,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:04,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:04,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:04,485 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 11:42:04,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:04,834 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-16 11:42:04,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:42:04,835 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:42:04,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:04,836 INFO L225 Difference]: With dead ends: 77 [2020-10-16 11:42:04,836 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 11:42:04,836 INFO L677 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 [2020-10-16 11:42:04,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 11:42:04,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-16 11:42:04,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:42:04,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 11:42:04,839 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 11:42:04,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:04,839 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 11:42:04,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:04,840 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 11:42:04,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:42:04,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:04,840 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:05,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 11:42:05,049 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:05,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:05,049 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-16 11:42:05,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:05,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964157437] [2020-10-16 11:42:05,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:05,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964157437] [2020-10-16 11:42:05,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767532815] [2020-10-16 11:42:05,128 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 [2020-10-16 11:42:05,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 11:42:05,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:05,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:42:05,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:05,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:05,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 11:42:05,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085604270] [2020-10-16 11:42:05,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:42:05,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:05,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:42:05,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:42:05,191 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 11:42:05,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:05,460 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-16 11:42:05,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:42:05,461 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 11:42:05,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:05,462 INFO L225 Difference]: With dead ends: 74 [2020-10-16 11:42:05,462 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 11:42:05,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:42:05,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 11:42:05,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-16 11:42:05,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:42:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 11:42:05,466 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 11:42:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:05,466 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 11:42:05,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:42:05,466 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 11:42:05,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:42:05,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:05,467 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:05,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:05,678 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:05,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:05,678 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-16 11:42:05,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:05,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662228941] [2020-10-16 11:42:05,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:05,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662228941] [2020-10-16 11:42:05,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763743651] [2020-10-16 11:42:05,754 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 [2020-10-16 11:42:05,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 11:42:05,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:05,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:42:05,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:05,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:05,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:05,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:42:05,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026167336] [2020-10-16 11:42:05,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:05,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:05,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:05,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:05,868 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 11:42:06,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:06,265 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-16 11:42:06,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:06,266 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:42:06,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:06,267 INFO L225 Difference]: With dead ends: 73 [2020-10-16 11:42:06,267 INFO L226 Difference]: Without dead ends: 67 [2020-10-16 11:42:06,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:42:06,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-16 11:42:06,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-16 11:42:06,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:42:06,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 11:42:06,270 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 11:42:06,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:06,270 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 11:42:06,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:06,270 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 11:42:06,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:42:06,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:06,271 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:06,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-16 11:42:06,480 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:06,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:06,481 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-16 11:42:06,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:06,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679613938] [2020-10-16 11:42:06,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:06,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:06,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679613938] [2020-10-16 11:42:06,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495211405] [2020-10-16 11:42:06,562 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 [2020-10-16 11:42:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:06,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:42:06,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:06,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:06,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:06,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 11:42:06,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099527251] [2020-10-16 11:42:06,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:42:06,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:06,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:42:06,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:42:06,644 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 11:42:06,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:06,926 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-16 11:42:06,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:06,927 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 11:42:06,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:06,928 INFO L225 Difference]: With dead ends: 89 [2020-10-16 11:42:06,928 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 11:42:06,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:42:06,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 11:42:06,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-16 11:42:06,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 11:42:06,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-16 11:42:06,933 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-16 11:42:06,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:06,933 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-16 11:42:06,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:42:06,933 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-16 11:42:06,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:42:06,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:06,934 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:07,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:07,144 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:07,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:07,144 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-16 11:42:07,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:07,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098459554] [2020-10-16 11:42:07,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:07,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098459554] [2020-10-16 11:42:07,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578078508] [2020-10-16 11:42:07,222 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 [2020-10-16 11:42:07,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:07,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:07,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:07,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:07,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:07,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:42:07,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245131275] [2020-10-16 11:42:07,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:07,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:07,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:07,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:07,320 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-16 11:42:07,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:07,703 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-10-16 11:42:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:07,704 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:42:07,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:07,705 INFO L225 Difference]: With dead ends: 68 [2020-10-16 11:42:07,705 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 11:42:07,706 INFO L677 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 [2020-10-16 11:42:07,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 11:42:07,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-10-16 11:42:07,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-16 11:42:07,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-16 11:42:07,710 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-16 11:42:07,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:07,710 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-16 11:42:07,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:07,710 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-16 11:42:07,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:42:07,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:07,711 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:07,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-16 11:42:07,915 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:07,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:07,915 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-16 11:42:07,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:07,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379279387] [2020-10-16 11:42:07,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:08,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379279387] [2020-10-16 11:42:08,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170800218] [2020-10-16 11:42:08,010 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 [2020-10-16 11:42:08,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:42:08,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:08,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:42:08,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:08,168 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:08,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:08,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:08,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:42:08,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67324991] [2020-10-16 11:42:08,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:08,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:08,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:08,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:08,180 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-16 11:42:08,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:08,544 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-16 11:42:08,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:08,544 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:42:08,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:08,545 INFO L225 Difference]: With dead ends: 76 [2020-10-16 11:42:08,545 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 11:42:08,545 INFO L677 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 [2020-10-16 11:42:08,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 11:42:08,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-16 11:42:08,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:42:08,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-16 11:42:08,548 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-16 11:42:08,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:08,548 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-16 11:42:08,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:08,548 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-16 11:42:08,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:08,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:08,549 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:08,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:08,757 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:08,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:08,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-16 11:42:08,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:08,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752966826] [2020-10-16 11:42:08,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:08,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752966826] [2020-10-16 11:42:08,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795018560] [2020-10-16 11:42:08,835 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 [2020-10-16 11:42:08,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:08,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:08,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:08,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:08,903 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:08,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:08,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:08,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035631886] [2020-10-16 11:42:08,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:08,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:08,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:08,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:08,917 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-16 11:42:09,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:09,329 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-16 11:42:09,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:09,329 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:09,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:09,330 INFO L225 Difference]: With dead ends: 66 [2020-10-16 11:42:09,331 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 11:42:09,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:42:09,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 11:42:09,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-16 11:42:09,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:42:09,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-16 11:42:09,334 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-16 11:42:09,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:09,335 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-16 11:42:09,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:09,335 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-16 11:42:09,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:09,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:09,335 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:09,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-16 11:42:09,539 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:09,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:09,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-16 11:42:09,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:09,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974569509] [2020-10-16 11:42:09,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:09,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974569509] [2020-10-16 11:42:09,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896462341] [2020-10-16 11:42:09,651 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 [2020-10-16 11:42:09,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 11:42:09,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:09,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:09,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:09,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:09,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:09,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50556239] [2020-10-16 11:42:09,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:09,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:09,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:09,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:09,720 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-16 11:42:09,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:09,884 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-16 11:42:09,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:42:09,885 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:09,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:09,886 INFO L225 Difference]: With dead ends: 72 [2020-10-16 11:42:09,886 INFO L226 Difference]: Without dead ends: 66 [2020-10-16 11:42:09,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:42:09,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-16 11:42:09,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-16 11:42:09,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 11:42:09,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-16 11:42:09,889 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-16 11:42:09,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:09,890 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-16 11:42:09,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:09,890 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-16 11:42:09,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:09,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:09,890 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:10,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 11:42:10,100 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:10,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:10,100 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-16 11:42:10,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:10,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191718326] [2020-10-16 11:42:10,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:10,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:10,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191718326] [2020-10-16 11:42:10,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839839040] [2020-10-16 11:42:10,211 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 [2020-10-16 11:42:10,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 11:42:10,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:10,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:10,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:10,276 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:10,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:10,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:10,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14355879] [2020-10-16 11:42:10,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:10,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:10,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:10,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:10,298 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-16 11:42:10,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:10,529 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-16 11:42:10,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:42:10,529 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:10,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:10,530 INFO L225 Difference]: With dead ends: 82 [2020-10-16 11:42:10,530 INFO L226 Difference]: Without dead ends: 76 [2020-10-16 11:42:10,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:42:10,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-16 11:42:10,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-16 11:42:10,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 11:42:10,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-16 11:42:10,534 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-16 11:42:10,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:10,534 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-16 11:42:10,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:10,534 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-16 11:42:10,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:10,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:10,534 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:10,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-16 11:42:10,735 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:10,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:10,736 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-16 11:42:10,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:10,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133092114] [2020-10-16 11:42:10,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:10,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133092114] [2020-10-16 11:42:10,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419435664] [2020-10-16 11:42:10,845 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 [2020-10-16 11:42:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:10,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:10,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:10,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:10,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:10,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:10,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307389454] [2020-10-16 11:42:10,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:10,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:10,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:10,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:10,934 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-16 11:42:11,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:11,253 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-16 11:42:11,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:42:11,254 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:11,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:11,255 INFO L225 Difference]: With dead ends: 83 [2020-10-16 11:42:11,255 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 11:42:11,255 INFO L677 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 [2020-10-16 11:42:11,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 11:42:11,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-16 11:42:11,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 11:42:11,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-16 11:42:11,259 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-16 11:42:11,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:11,260 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-16 11:42:11,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:11,260 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-16 11:42:11,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:11,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:11,260 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:11,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-16 11:42:11,470 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:11,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:11,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-16 11:42:11,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:11,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331940778] [2020-10-16 11:42:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:11,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331940778] [2020-10-16 11:42:11,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009377437] [2020-10-16 11:42:11,589 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 [2020-10-16 11:42:11,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:11,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:11,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:11,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:11,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:11,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:11,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:11,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034473630] [2020-10-16 11:42:11,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:11,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:11,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:11,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:11,666 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-16 11:42:11,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:11,961 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-16 11:42:11,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:42:11,966 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:11,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:11,966 INFO L225 Difference]: With dead ends: 89 [2020-10-16 11:42:11,966 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 11:42:11,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:42:11,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 11:42:11,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-16 11:42:11,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 11:42:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-16 11:42:11,969 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-16 11:42:11,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:11,969 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-16 11:42:11,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:11,969 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-16 11:42:11,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:11,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:11,969 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:12,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:12,170 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:12,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:12,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-16 11:42:12,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:12,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136917569] [2020-10-16 11:42:12,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:12,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:12,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136917569] [2020-10-16 11:42:12,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255815740] [2020-10-16 11:42:12,270 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 [2020-10-16 11:42:12,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 11:42:12,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:12,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:12,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:12,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:12,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:12,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836925288] [2020-10-16 11:42:12,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:12,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:12,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:12,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:12,379 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-16 11:42:12,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:12,750 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-16 11:42:12,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:12,751 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:12,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:12,752 INFO L225 Difference]: With dead ends: 89 [2020-10-16 11:42:12,752 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 11:42:12,752 INFO L677 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 [2020-10-16 11:42:12,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 11:42:12,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-16 11:42:12,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:42:12,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 11:42:12,756 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-16 11:42:12,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:12,756 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 11:42:12,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:12,757 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 11:42:12,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:12,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:12,757 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:12,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:12,969 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:12,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:12,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-16 11:42:12,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:12,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765266901] [2020-10-16 11:42:12,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:13,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765266901] [2020-10-16 11:42:13,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307356951] [2020-10-16 11:42:13,115 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 [2020-10-16 11:42:13,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:13,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:13,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:13,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:13,178 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:13,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:13,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:13,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459558095] [2020-10-16 11:42:13,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:13,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:13,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:13,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:13,190 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-16 11:42:13,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:13,554 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-16 11:42:13,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:13,554 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:13,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:13,555 INFO L225 Difference]: With dead ends: 86 [2020-10-16 11:42:13,555 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 11:42:13,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-16 11:42:13,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 11:42:13,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-16 11:42:13,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:42:13,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 11:42:13,558 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-16 11:42:13,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:13,558 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 11:42:13,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:13,558 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 11:42:13,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:13,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:13,559 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:13,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-16 11:42:13,760 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:13,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:13,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-16 11:42:13,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:13,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287863486] [2020-10-16 11:42:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:13,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287863486] [2020-10-16 11:42:13,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726823576] [2020-10-16 11:42:13,847 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 [2020-10-16 11:42:13,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 11:42:13,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:13,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:13,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:13,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:13,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:13,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689345885] [2020-10-16 11:42:13,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:13,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:13,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:13,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:13,922 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-16 11:42:14,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:14,243 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-16 11:42:14,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:42:14,244 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:14,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:14,245 INFO L225 Difference]: With dead ends: 87 [2020-10-16 11:42:14,245 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 11:42:14,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:42:14,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 11:42:14,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-16 11:42:14,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-16 11:42:14,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-16 11:42:14,249 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-16 11:42:14,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:14,250 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-16 11:42:14,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:14,250 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-16 11:42:14,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:14,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:14,250 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:14,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:14,460 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:14,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:14,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-16 11:42:14,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:14,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914035162] [2020-10-16 11:42:14,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:14,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914035162] [2020-10-16 11:42:14,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984220992] [2020-10-16 11:42:14,549 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 [2020-10-16 11:42:14,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 11:42:14,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:14,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:14,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:14,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:14,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:14,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:14,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885209267] [2020-10-16 11:42:14,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:14,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:14,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:14,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:14,640 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-16 11:42:15,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:15,070 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-16 11:42:15,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:15,071 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:15,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:15,072 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:42:15,072 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 11:42:15,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:42:15,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 11:42:15,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-16 11:42:15,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:42:15,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-16 11:42:15,075 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-16 11:42:15,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:15,075 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-16 11:42:15,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:15,076 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-16 11:42:15,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:15,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:15,076 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:15,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-16 11:42:15,286 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:15,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:15,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-16 11:42:15,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:15,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398656946] [2020-10-16 11:42:15,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:15,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398656946] [2020-10-16 11:42:15,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212431973] [2020-10-16 11:42:15,370 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 [2020-10-16 11:42:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:15,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:15,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:15,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:15,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:15,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764960534] [2020-10-16 11:42:15,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:15,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:15,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:15,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:15,430 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-16 11:42:15,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:15,810 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-16 11:42:15,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:15,811 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:15,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:15,812 INFO L225 Difference]: With dead ends: 104 [2020-10-16 11:42:15,812 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:42:15,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:42:15,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:42:15,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-16 11:42:15,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:42:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-16 11:42:15,815 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-16 11:42:15,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:15,816 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-16 11:42:15,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:15,816 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-16 11:42:15,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:15,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:15,816 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:16,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-16 11:42:16,019 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:16,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:16,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-16 11:42:16,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:16,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515466098] [2020-10-16 11:42:16,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:16,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:16,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515466098] [2020-10-16 11:42:16,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794370997] [2020-10-16 11:42:16,107 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 [2020-10-16 11:42:16,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:16,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:16,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:16,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:16,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:16,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:16,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:16,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606011315] [2020-10-16 11:42:16,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:16,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:16,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:16,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:16,193 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-16 11:42:16,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:16,689 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-16 11:42:16,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:42:16,690 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:16,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:16,691 INFO L225 Difference]: With dead ends: 85 [2020-10-16 11:42:16,691 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 11:42:16,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:42:16,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 11:42:16,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-16 11:42:16,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 11:42:16,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-16 11:42:16,695 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-16 11:42:16,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:16,695 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-16 11:42:16,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:16,696 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-16 11:42:16,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:16,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:16,696 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:16,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-16 11:42:16,897 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:16,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:16,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-16 11:42:16,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:16,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094217221] [2020-10-16 11:42:16,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:17,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094217221] [2020-10-16 11:42:17,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497226781] [2020-10-16 11:42:17,018 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 [2020-10-16 11:42:17,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 11:42:17,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:17,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:17,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:17,083 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:17,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:17,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 11:42:17,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597262911] [2020-10-16 11:42:17,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:17,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:17,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:17,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:17,085 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-16 11:42:17,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:17,299 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-16 11:42:17,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:42:17,300 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 11:42:17,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:17,301 INFO L225 Difference]: With dead ends: 94 [2020-10-16 11:42:17,301 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 11:42:17,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:42:17,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 11:42:17,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-16 11:42:17,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:17,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 11:42:17,304 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 11:42:17,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:17,304 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 11:42:17,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:17,305 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 11:42:17,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:17,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:17,305 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:17,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-16 11:42:17,514 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:17,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:17,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-16 11:42:17,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:17,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629974952] [2020-10-16 11:42:17,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:17,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:17,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629974952] [2020-10-16 11:42:17,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386231642] [2020-10-16 11:42:17,638 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 [2020-10-16 11:42:17,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:17,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:17,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:17,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:17,703 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:17,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:17,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:17,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735322380] [2020-10-16 11:42:17,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:17,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:17,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:17,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:17,717 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 11:42:18,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:18,025 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-16 11:42:18,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:42:18,025 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:18,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:18,026 INFO L225 Difference]: With dead ends: 91 [2020-10-16 11:42:18,026 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 11:42:18,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:42:18,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 11:42:18,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-16 11:42:18,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:18,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 11:42:18,032 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 11:42:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:18,032 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 11:42:18,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:18,032 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 11:42:18,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:18,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:18,033 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:18,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-16 11:42:18,242 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:18,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:18,243 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-16 11:42:18,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:18,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498281660] [2020-10-16 11:42:18,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:18,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498281660] [2020-10-16 11:42:18,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405543304] [2020-10-16 11:42:18,362 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 [2020-10-16 11:42:18,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 11:42:18,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:18,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:18,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:18,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:18,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 11:42:18,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775615327] [2020-10-16 11:42:18,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:18,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:18,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:18,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:18,430 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 11:42:18,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:18,684 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-16 11:42:18,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:42:18,685 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 11:42:18,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:18,686 INFO L225 Difference]: With dead ends: 88 [2020-10-16 11:42:18,686 INFO L226 Difference]: Without dead ends: 82 [2020-10-16 11:42:18,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:42:18,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-16 11:42:18,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-16 11:42:18,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 11:42:18,690 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 11:42:18,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:18,690 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 11:42:18,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:18,690 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 11:42:18,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:18,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:18,691 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:18,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:18,898 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:18,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:18,899 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-16 11:42:18,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:18,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948721190] [2020-10-16 11:42:18,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:18,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948721190] [2020-10-16 11:42:18,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283197144] [2020-10-16 11:42:18,998 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 [2020-10-16 11:42:19,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 11:42:19,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:19,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:19,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:19,071 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:19,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:19,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:19,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141729680] [2020-10-16 11:42:19,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:19,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:19,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:19,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:19,082 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 11:42:19,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:19,453 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-16 11:42:19,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:19,454 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:19,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:19,455 INFO L225 Difference]: With dead ends: 87 [2020-10-16 11:42:19,455 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 11:42:19,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:42:19,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 11:42:19,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-16 11:42:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:19,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 11:42:19,458 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 11:42:19,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:19,458 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 11:42:19,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:19,458 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 11:42:19,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:19,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:19,459 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:19,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:19,660 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:19,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:19,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-16 11:42:19,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:19,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798210046] [2020-10-16 11:42:19,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:19,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:19,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798210046] [2020-10-16 11:42:19,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855312487] [2020-10-16 11:42:19,766 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 [2020-10-16 11:42:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:19,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:19,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:19,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:19,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 11:42:19,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698729902] [2020-10-16 11:42:19,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:19,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:19,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:19,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:19,846 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 11:42:20,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:20,160 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-16 11:42:20,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:20,161 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 11:42:20,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:20,162 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:42:20,162 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 11:42:20,162 INFO L677 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 [2020-10-16 11:42:20,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 11:42:20,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-16 11:42:20,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:20,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 11:42:20,165 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 11:42:20,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:20,165 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 11:42:20,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:20,165 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 11:42:20,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:20,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:20,165 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:20,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-16 11:42:20,367 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:20,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:20,368 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-16 11:42:20,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:20,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385781752] [2020-10-16 11:42:20,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:20,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385781752] [2020-10-16 11:42:20,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693605456] [2020-10-16 11:42:20,475 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 [2020-10-16 11:42:20,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:20,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:20,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:20,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:20,537 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:20,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:20,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:20,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467785027] [2020-10-16 11:42:20,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:20,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:20,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:20,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:20,547 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 11:42:20,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:20,998 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-16 11:42:20,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:20,999 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:20,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:21,000 INFO L225 Difference]: With dead ends: 83 [2020-10-16 11:42:21,000 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 11:42:21,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:42:21,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 11:42:21,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-16 11:42:21,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:21,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 11:42:21,002 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 11:42:21,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:21,003 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 11:42:21,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:21,003 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 11:42:21,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:21,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:21,004 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:21,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:21,206 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:21,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:21,206 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-16 11:42:21,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:21,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472420749] [2020-10-16 11:42:21,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:21,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472420749] [2020-10-16 11:42:21,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562719107] [2020-10-16 11:42:21,299 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 [2020-10-16 11:42:21,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 11:42:21,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:21,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:21,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:21,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:21,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 11:42:21,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164550654] [2020-10-16 11:42:21,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:21,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:21,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:21,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:21,368 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 11:42:21,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:21,755 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-16 11:42:21,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:42:21,756 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 11:42:21,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:21,757 INFO L225 Difference]: With dead ends: 80 [2020-10-16 11:42:21,757 INFO L226 Difference]: Without dead ends: 74 [2020-10-16 11:42:21,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:42:21,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-16 11:42:21,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-16 11:42:21,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:21,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 11:42:21,760 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 11:42:21,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:21,761 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 11:42:21,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:21,761 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 11:42:21,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:21,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:21,761 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:21,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-16 11:42:21,963 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:21,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:21,963 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-16 11:42:21,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:21,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101107295] [2020-10-16 11:42:21,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:22,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101107295] [2020-10-16 11:42:22,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773171966] [2020-10-16 11:42:22,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:42:22,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:22,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:22,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:22,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:22,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:22,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:22,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:22,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160741576] [2020-10-16 11:42:22,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:22,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:22,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:22,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:22,147 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 11:42:22,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:22,656 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-16 11:42:22,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:42:22,656 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:22,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:22,657 INFO L225 Difference]: With dead ends: 79 [2020-10-16 11:42:22,657 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 11:42:22,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:42:22,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 11:42:22,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-16 11:42:22,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:22,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 11:42:22,660 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 11:42:22,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:22,660 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 11:42:22,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:22,661 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 11:42:22,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:22,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:22,661 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:22,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:22,862 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:22,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:22,862 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-16 11:42:22,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:22,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299430495] [2020-10-16 11:42:22,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:22,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299430495] [2020-10-16 11:42:22,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629934373] [2020-10-16 11:42:22,950 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 [2020-10-16 11:42:22,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 11:42:22,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:22,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:22,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:23,021 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:23,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:23,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 11:42:23,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064721402] [2020-10-16 11:42:23,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:23,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:23,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:23,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:23,023 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 11:42:23,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:23,431 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-16 11:42:23,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:23,436 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 11:42:23,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:23,437 INFO L225 Difference]: With dead ends: 95 [2020-10-16 11:42:23,437 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 11:42:23,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:42:23,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 11:42:23,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-16 11:42:23,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:42:23,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-16 11:42:23,440 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-16 11:42:23,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:23,440 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-16 11:42:23,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:23,440 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-16 11:42:23,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:23,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:23,441 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:23,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-16 11:42:23,642 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:23,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:23,642 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-16 11:42:23,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:23,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659438225] [2020-10-16 11:42:23,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:23,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659438225] [2020-10-16 11:42:23,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865337614] [2020-10-16 11:42:23,733 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 [2020-10-16 11:42:23,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 11:42:23,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:23,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:23,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:23,809 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:23,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:23,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:23,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346550427] [2020-10-16 11:42:23,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:23,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:23,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:23,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:23,822 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-16 11:42:24,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:24,389 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-10-16 11:42:24,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:42:24,390 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:24,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:24,391 INFO L225 Difference]: With dead ends: 76 [2020-10-16 11:42:24,391 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 11:42:24,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:42:24,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 11:42:24,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-10-16 11:42:24,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 11:42:24,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-16 11:42:24,393 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-16 11:42:24,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:24,393 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-16 11:42:24,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:24,394 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-16 11:42:24,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:24,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:24,394 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:24,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:24,598 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:24,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:24,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-16 11:42:24,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:24,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852834343] [2020-10-16 11:42:24,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:24,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852834343] [2020-10-16 11:42:24,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363026265] [2020-10-16 11:42:24,702 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 [2020-10-16 11:42:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:24,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:24,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:24,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:24,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:24,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:24,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213418445] [2020-10-16 11:42:24,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:24,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:24,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:24,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:24,779 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-16 11:42:25,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:25,282 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-16 11:42:25,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:25,282 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:25,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:25,283 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:42:25,283 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 11:42:25,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:42:25,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 11:42:25,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-16 11:42:25,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:42:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-16 11:42:25,286 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-16 11:42:25,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:25,287 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-16 11:42:25,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:25,287 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-16 11:42:25,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:25,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:25,287 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:25,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-16 11:42:25,488 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:25,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:25,489 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-16 11:42:25,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:25,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95055016] [2020-10-16 11:42:25,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:25,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:25,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95055016] [2020-10-16 11:42:25,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962446736] [2020-10-16 11:42:25,599 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 [2020-10-16 11:42:25,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:25,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:25,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:25,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:25,665 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:25,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:25,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:25,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488315151] [2020-10-16 11:42:25,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:25,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:25,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:25,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:25,681 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-10-16 11:42:26,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:26,230 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-10-16 11:42:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:26,230 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:26,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:26,231 INFO L225 Difference]: With dead ends: 72 [2020-10-16 11:42:26,231 INFO L226 Difference]: Without dead ends: 67 [2020-10-16 11:42:26,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:42:26,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-16 11:42:26,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-16 11:42:26,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:42:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-16 11:42:26,233 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-10-16 11:42:26,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:26,234 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-16 11:42:26,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:26,234 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-16 11:42:26,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:26,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:26,234 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:26,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-16 11:42:26,440 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:26,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:26,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-16 11:42:26,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:26,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732504949] [2020-10-16 11:42:26,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:26,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732504949] [2020-10-16 11:42:26,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591475027] [2020-10-16 11:42:26,587 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 [2020-10-16 11:42:26,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 11:42:26,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:26,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:26,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:26,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:26,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 11:42:26,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241641689] [2020-10-16 11:42:26,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:26,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:26,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:26,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:26,654 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-10-16 11:42:26,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:26,883 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-10-16 11:42:26,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:42:26,883 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:26,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:26,884 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:42:26,885 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 11:42:26,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:42:26,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 11:42:26,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-16 11:42:26,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:42:26,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-16 11:42:26,887 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-10-16 11:42:26,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:26,887 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-16 11:42:26,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:26,888 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-16 11:42:26,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:26,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:26,888 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:27,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:27,089 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:27,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:27,089 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-10-16 11:42:27,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:27,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237944783] [2020-10-16 11:42:27,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:27,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237944783] [2020-10-16 11:42:27,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691673130] [2020-10-16 11:42:27,241 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 [2020-10-16 11:42:27,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:27,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:27,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:27,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:27,304 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:27,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:27,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:27,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571150040] [2020-10-16 11:42:27,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:27,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:27,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:27,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:27,314 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-10-16 11:42:27,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:27,598 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-10-16 11:42:27,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:42:27,598 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:27,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:27,599 INFO L225 Difference]: With dead ends: 90 [2020-10-16 11:42:27,599 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 11:42:27,600 INFO L677 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 [2020-10-16 11:42:27,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 11:42:27,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-10-16 11:42:27,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:42:27,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-10-16 11:42:27,602 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-10-16 11:42:27,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:27,602 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-10-16 11:42:27,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:27,602 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-10-16 11:42:27,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:27,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:27,603 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:27,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:27,811 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:27,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:27,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-10-16 11:42:27,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:27,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912612290] [2020-10-16 11:42:27,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:27,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912612290] [2020-10-16 11:42:27,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29476662] [2020-10-16 11:42:27,938 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 [2020-10-16 11:42:27,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 11:42:27,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:27,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:27,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:27,993 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:27,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:27,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 11:42:27,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648020426] [2020-10-16 11:42:27,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:27,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:27,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:27,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:27,995 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-10-16 11:42:28,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:28,314 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-10-16 11:42:28,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:28,315 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:28,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:28,316 INFO L225 Difference]: With dead ends: 91 [2020-10-16 11:42:28,316 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 11:42:28,316 INFO L677 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 [2020-10-16 11:42:28,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 11:42:28,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-10-16 11:42:28,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-16 11:42:28,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-16 11:42:28,318 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-10-16 11:42:28,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:28,319 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-16 11:42:28,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:28,319 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-16 11:42:28,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:28,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:28,319 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:28,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:28,520 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:28,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:28,520 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-10-16 11:42:28,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:28,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540070770] [2020-10-16 11:42:28,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:28,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540070770] [2020-10-16 11:42:28,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456903634] [2020-10-16 11:42:28,656 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 [2020-10-16 11:42:28,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 11:42:28,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:28,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:28,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:28,741 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:28,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:28,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:28,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906456061] [2020-10-16 11:42:28,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:28,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:28,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:28,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:28,751 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-10-16 11:42:29,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:29,081 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-10-16 11:42:29,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:29,082 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:29,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:29,083 INFO L225 Difference]: With dead ends: 99 [2020-10-16 11:42:29,083 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 11:42:29,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:42:29,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 11:42:29,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-16 11:42:29,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:42:29,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-16 11:42:29,086 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-10-16 11:42:29,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:29,087 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-16 11:42:29,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:29,087 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-16 11:42:29,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:29,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:29,087 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:29,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:29,288 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:29,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:29,289 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-10-16 11:42:29,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:29,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587159081] [2020-10-16 11:42:29,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:29,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:29,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587159081] [2020-10-16 11:42:29,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827924838] [2020-10-16 11:42:29,407 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 [2020-10-16 11:42:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:29,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:29,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:29,470 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:29,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:29,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 11:42:29,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109210408] [2020-10-16 11:42:29,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:29,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:29,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:29,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:29,472 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-10-16 11:42:29,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:29,834 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-16 11:42:29,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:42:29,835 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:29,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:29,836 INFO L225 Difference]: With dead ends: 99 [2020-10-16 11:42:29,836 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 11:42:29,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:42:29,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 11:42:29,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-10-16 11:42:29,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 11:42:29,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-10-16 11:42:29,839 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-10-16 11:42:29,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:29,839 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-10-16 11:42:29,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:29,839 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-10-16 11:42:29,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:29,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:29,840 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:30,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-16 11:42:30,042 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:30,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:30,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-10-16 11:42:30,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:30,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416977709] [2020-10-16 11:42:30,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:30,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416977709] [2020-10-16 11:42:30,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271724922] [2020-10-16 11:42:30,169 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 [2020-10-16 11:42:30,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:30,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:30,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:30,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:30,241 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:30,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:30,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:30,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377596231] [2020-10-16 11:42:30,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:30,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:30,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:30,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:30,254 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-10-16 11:42:30,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:30,684 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-10-16 11:42:30,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:30,684 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:30,685 INFO L225 Difference]: With dead ends: 96 [2020-10-16 11:42:30,686 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 11:42:30,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:42:30,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 11:42:30,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-16 11:42:30,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 11:42:30,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-16 11:42:30,688 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-10-16 11:42:30,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:30,689 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-16 11:42:30,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:30,689 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-16 11:42:30,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:30,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:30,689 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:30,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:30,890 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:30,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:30,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-10-16 11:42:30,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:30,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278477058] [2020-10-16 11:42:30,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:31,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278477058] [2020-10-16 11:42:31,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068416775] [2020-10-16 11:42:31,013 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 [2020-10-16 11:42:31,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 11:42:31,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:31,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:31,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:31,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:31,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 11:42:31,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467346404] [2020-10-16 11:42:31,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:31,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:31,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:31,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:31,083 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-10-16 11:42:31,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:31,466 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-10-16 11:42:31,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:31,467 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:31,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:31,468 INFO L225 Difference]: With dead ends: 97 [2020-10-16 11:42:31,468 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 11:42:31,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:42:31,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 11:42:31,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-10-16 11:42:31,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:31,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 11:42:31,470 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-10-16 11:42:31,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:31,470 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 11:42:31,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:31,471 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 11:42:31,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:31,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:31,471 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:31,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-16 11:42:31,672 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:31,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:31,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-10-16 11:42:31,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:31,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618239631] [2020-10-16 11:42:31,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:31,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:31,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618239631] [2020-10-16 11:42:31,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213015397] [2020-10-16 11:42:31,774 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 [2020-10-16 11:42:31,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:31,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:31,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:31,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:31,846 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:31,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:31,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:31,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619592283] [2020-10-16 11:42:31,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:31,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:31,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:31,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:31,857 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-10-16 11:42:32,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:32,413 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-16 11:42:32,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:42:32,414 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:32,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:32,415 INFO L225 Difference]: With dead ends: 94 [2020-10-16 11:42:32,415 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 11:42:32,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 11:42:32,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 11:42:32,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-10-16 11:42:32,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:32,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 11:42:32,419 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-10-16 11:42:32,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:32,420 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 11:42:32,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:32,420 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 11:42:32,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:32,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:32,421 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:32,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:32,631 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:32,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:32,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-10-16 11:42:32,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:32,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394396995] [2020-10-16 11:42:32,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:32,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:32,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394396995] [2020-10-16 11:42:32,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721277807] [2020-10-16 11:42:32,791 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 [2020-10-16 11:42:32,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 11:42:32,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:32,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:32,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:32,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:32,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 11:42:32,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634223708] [2020-10-16 11:42:32,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:32,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:32,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:32,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:32,898 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-10-16 11:42:33,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:33,329 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-10-16 11:42:33,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:42:33,329 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:33,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:33,330 INFO L225 Difference]: With dead ends: 95 [2020-10-16 11:42:33,330 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 11:42:33,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:42:33,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 11:42:33,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-16 11:42:33,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 11:42:33,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-16 11:42:33,333 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-10-16 11:42:33,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:33,333 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-16 11:42:33,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:33,333 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-16 11:42:33,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:33,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:33,334 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:33,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-16 11:42:33,544 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:33,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:33,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-10-16 11:42:33,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:33,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279037200] [2020-10-16 11:42:33,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:33,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279037200] [2020-10-16 11:42:33,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721303210] [2020-10-16 11:42:33,665 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 [2020-10-16 11:42:33,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 11:42:33,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:33,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:33,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:33,734 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:33,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:33,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:33,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762019257] [2020-10-16 11:42:33,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:33,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:33,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:33,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:33,749 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-16 11:42:34,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:34,303 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-16 11:42:34,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:42:34,303 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:34,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:34,304 INFO L225 Difference]: With dead ends: 92 [2020-10-16 11:42:34,304 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 11:42:34,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:42:34,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 11:42:34,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-16 11:42:34,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:42:34,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-16 11:42:34,308 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-10-16 11:42:34,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:34,308 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-16 11:42:34,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:34,309 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-16 11:42:34,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:34,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:34,309 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:34,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:34,519 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:34,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:34,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-10-16 11:42:34,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:34,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440367024] [2020-10-16 11:42:34,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:34,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440367024] [2020-10-16 11:42:34,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066998201] [2020-10-16 11:42:34,617 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 [2020-10-16 11:42:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:34,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:34,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:34,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:34,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 11:42:34,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112669675] [2020-10-16 11:42:34,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:34,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:34,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:34,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:34,725 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-10-16 11:42:35,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:35,271 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-10-16 11:42:35,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:42:35,271 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:35,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:35,272 INFO L225 Difference]: With dead ends: 112 [2020-10-16 11:42:35,272 INFO L226 Difference]: Without dead ends: 106 [2020-10-16 11:42:35,273 INFO L677 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 [2020-10-16 11:42:35,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-16 11:42:35,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-10-16 11:42:35,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:42:35,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-10-16 11:42:35,276 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-10-16 11:42:35,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:35,276 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-10-16 11:42:35,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:35,276 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-10-16 11:42:35,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:35,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:35,277 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:35,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:35,485 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:35,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:35,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-10-16 11:42:35,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:35,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052268013] [2020-10-16 11:42:35,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:35,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052268013] [2020-10-16 11:42:35,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037624756] [2020-10-16 11:42:35,598 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 [2020-10-16 11:42:35,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:35,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:35,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:35,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:35,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:35,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:35,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216367963] [2020-10-16 11:42:35,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:35,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:35,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:35,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:35,708 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-10-16 11:42:36,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:36,296 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-10-16 11:42:36,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:42:36,297 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:36,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:36,298 INFO L225 Difference]: With dead ends: 93 [2020-10-16 11:42:36,298 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 11:42:36,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:42:36,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 11:42:36,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-16 11:42:36,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 11:42:36,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-16 11:42:36,301 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-16 11:42:36,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:36,302 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-16 11:42:36,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:36,302 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-16 11:42:36,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:36,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:36,302 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:36,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:36,505 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:36,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:36,505 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-10-16 11:42:36,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:36,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069708344] [2020-10-16 11:42:36,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:36,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069708344] [2020-10-16 11:42:36,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736035074] [2020-10-16 11:42:36,666 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 [2020-10-16 11:42:36,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 11:42:36,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:36,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:36,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:36,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:36,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:36,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922808270] [2020-10-16 11:42:36,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:36,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:36,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:36,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:36,731 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-16 11:42:37,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:37,016 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-10-16 11:42:37,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:42:37,016 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:37,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:37,017 INFO L225 Difference]: With dead ends: 104 [2020-10-16 11:42:37,017 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:42:37,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-16 11:42:37,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:42:37,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-16 11:42:37,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:37,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:37,020 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 11:42:37,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:37,020 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:37,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:37,021 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:37,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:37,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:37,021 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:37,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:37,231 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:37,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:37,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-10-16 11:42:37,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:37,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463972760] [2020-10-16 11:42:37,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:37,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463972760] [2020-10-16 11:42:37,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501696634] [2020-10-16 11:42:37,392 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 [2020-10-16 11:42:37,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:37,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:37,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:37,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:37,468 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:37,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:37,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:37,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179563630] [2020-10-16 11:42:37,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:37,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:37,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:37,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:37,479 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 11:42:37,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:37,850 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-10-16 11:42:37,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:37,851 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:37,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:37,852 INFO L225 Difference]: With dead ends: 101 [2020-10-16 11:42:37,852 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 11:42:37,853 INFO L677 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 [2020-10-16 11:42:37,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 11:42:37,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-10-16 11:42:37,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:37,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:37,855 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 11:42:37,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:37,855 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:37,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:37,855 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:37,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:37,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:37,856 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:38,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:38,057 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:38,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:38,057 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-10-16 11:42:38,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:38,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318133920] [2020-10-16 11:42:38,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:38,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318133920] [2020-10-16 11:42:38,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321061317] [2020-10-16 11:42:38,190 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 [2020-10-16 11:42:38,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 11:42:38,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:38,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:38,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:38,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:38,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:38,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838174676] [2020-10-16 11:42:38,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:38,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:38,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:38,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:38,295 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 11:42:38,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:38,777 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-10-16 11:42:38,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:38,777 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:38,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:38,779 INFO L225 Difference]: With dead ends: 98 [2020-10-16 11:42:38,779 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 11:42:38,779 INFO L677 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 [2020-10-16 11:42:38,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 11:42:38,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-16 11:42:38,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:38,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:38,782 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 11:42:38,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:38,783 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:38,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:38,783 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:38,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:38,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:38,783 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:38,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:38,993 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:38,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:38,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-10-16 11:42:38,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:38,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254817934] [2020-10-16 11:42:38,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:39,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254817934] [2020-10-16 11:42:39,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132050667] [2020-10-16 11:42:39,203 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 [2020-10-16 11:42:39,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 11:42:39,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:39,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:39,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:39,315 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:39,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:39,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:39,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237269644] [2020-10-16 11:42:39,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:39,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:39,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:39,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:39,335 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 11:42:39,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:39,922 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-16 11:42:39,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:39,922 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:39,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:39,923 INFO L225 Difference]: With dead ends: 97 [2020-10-16 11:42:39,924 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 11:42:39,924 INFO L677 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 [2020-10-16 11:42:39,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 11:42:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-16 11:42:39,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:39,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:39,929 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 11:42:39,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:39,929 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:39,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:39,929 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:39,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:39,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:39,930 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:40,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:40,142 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:40,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:40,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-10-16 11:42:40,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:40,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773608337] [2020-10-16 11:42:40,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:40,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:40,285 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:40,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773608337] [2020-10-16 11:42:40,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474546693] [2020-10-16 11:42:40,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:42:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:40,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:40,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:40,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:40,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:40,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792992578] [2020-10-16 11:42:40,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:40,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:40,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:40,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:40,354 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 11:42:40,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:40,750 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-16 11:42:40,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:42:40,750 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:40,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:40,751 INFO L225 Difference]: With dead ends: 94 [2020-10-16 11:42:40,752 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 11:42:40,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:42:40,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 11:42:40,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-10-16 11:42:40,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:40,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:40,755 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 11:42:40,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:40,755 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:40,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:40,755 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:40,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:40,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:40,755 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:40,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-16 11:42:40,956 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:40,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:40,957 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-10-16 11:42:40,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:40,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451686075] [2020-10-16 11:42:40,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:41,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451686075] [2020-10-16 11:42:41,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025372908] [2020-10-16 11:42:41,096 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 [2020-10-16 11:42:41,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:41,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:41,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:41,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:41,171 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:41,182 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:41,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:41,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:41,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759798248] [2020-10-16 11:42:41,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:41,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:41,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:41,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:41,184 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 11:42:41,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:41,707 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-16 11:42:41,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:42:41,708 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:41,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:41,709 INFO L225 Difference]: With dead ends: 93 [2020-10-16 11:42:41,709 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 11:42:41,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:42:41,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 11:42:41,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-16 11:42:41,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:41,712 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 11:42:41,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:41,713 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:41,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:41,713 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:41,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:41,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:41,713 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:41,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:41,914 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:41,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:41,915 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-10-16 11:42:41,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:41,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124860715] [2020-10-16 11:42:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:42,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124860715] [2020-10-16 11:42:42,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539303007] [2020-10-16 11:42:42,035 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 [2020-10-16 11:42:42,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 11:42:42,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:42,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:42,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:42,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:42,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:42,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431722391] [2020-10-16 11:42:42,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:42,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:42,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:42,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:42,151 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 11:42:42,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:42,627 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-10-16 11:42:42,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:42,628 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:42,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:42,629 INFO L225 Difference]: With dead ends: 90 [2020-10-16 11:42:42,629 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 11:42:42,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 11:42:42,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 11:42:42,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-16 11:42:42,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:42,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:42,632 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 11:42:42,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:42,632 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:42,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:42,632 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:42,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:42,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:42,633 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:42,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-16 11:42:42,842 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:42,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:42,842 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-10-16 11:42:42,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:42,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574961094] [2020-10-16 11:42:42,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:43,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574961094] [2020-10-16 11:42:43,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7534931] [2020-10-16 11:42:43,021 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 [2020-10-16 11:42:43,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:43,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:43,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:43,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:43,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:43,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:43,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:43,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462820570] [2020-10-16 11:42:43,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:43,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:43,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:43,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:43,140 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 11:42:43,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:43,724 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-16 11:42:43,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:42:43,724 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:43,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:43,725 INFO L225 Difference]: With dead ends: 89 [2020-10-16 11:42:43,725 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 11:42:43,726 INFO L677 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 [2020-10-16 11:42:43,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 11:42:43,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-16 11:42:43,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:43,729 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 11:42:43,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:43,729 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:43,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:43,729 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:43,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:43,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:43,730 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:43,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:43,933 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:43,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:43,933 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-10-16 11:42:43,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:43,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148919955] [2020-10-16 11:42:43,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:44,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148919955] [2020-10-16 11:42:44,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257286484] [2020-10-16 11:42:44,043 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 [2020-10-16 11:42:44,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 11:42:44,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:44,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:44,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:44,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:44,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:44,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387137981] [2020-10-16 11:42:44,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:44,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:44,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:44,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:44,114 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 11:42:44,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:44,621 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-10-16 11:42:44,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:42:44,621 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:44,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:44,622 INFO L225 Difference]: With dead ends: 86 [2020-10-16 11:42:44,622 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 11:42:44,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:42:44,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 11:42:44,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-16 11:42:44,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:44,626 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 11:42:44,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:44,626 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:44,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:44,627 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:44,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:44,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:44,627 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:44,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:44,834 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:44,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:44,835 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-10-16 11:42:44,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:44,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146414470] [2020-10-16 11:42:44,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:44,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146414470] [2020-10-16 11:42:44,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871362012] [2020-10-16 11:42:44,965 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 [2020-10-16 11:42:45,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 11:42:45,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:45,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:45,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:45,033 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:45,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:45,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:45,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741224727] [2020-10-16 11:42:45,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:45,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:45,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:45,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:45,047 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 11:42:45,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:45,739 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-10-16 11:42:45,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:42:45,739 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:45,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:45,740 INFO L225 Difference]: With dead ends: 85 [2020-10-16 11:42:45,741 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 11:42:45,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 11:42:45,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 11:42:45,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-16 11:42:45,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:45,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:45,744 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 11:42:45,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:45,744 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:45,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:45,744 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:45,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:45,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:45,744 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:45,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:45,945 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:45,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:45,946 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-10-16 11:42:45,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:45,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236664220] [2020-10-16 11:42:45,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:46,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236664220] [2020-10-16 11:42:46,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699646399] [2020-10-16 11:42:46,066 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 [2020-10-16 11:42:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:46,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:46,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:46,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:46,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:46,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049056092] [2020-10-16 11:42:46,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:46,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:46,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:46,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:46,152 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 11:42:46,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:46,697 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-16 11:42:46,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:42:46,697 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:46,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:46,698 INFO L225 Difference]: With dead ends: 101 [2020-10-16 11:42:46,699 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 11:42:46,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:42:46,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 11:42:46,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-16 11:42:46,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 11:42:46,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-10-16 11:42:46,702 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-10-16 11:42:46,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:46,703 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-10-16 11:42:46,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:46,703 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-10-16 11:42:46,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:46,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:46,704 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:46,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:46,915 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:46,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:46,915 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-10-16 11:42:46,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:46,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069071097] [2020-10-16 11:42:46,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:47,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069071097] [2020-10-16 11:42:47,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287561481] [2020-10-16 11:42:47,043 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 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 [2020-10-16 11:42:47,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:47,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:47,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:47,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:47,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:47,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:47,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480636063] [2020-10-16 11:42:47,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:47,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:47,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:47,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:47,128 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-10-16 11:42:47,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:47,776 INFO L93 Difference]: Finished difference Result 80 states and 197 transitions. [2020-10-16 11:42:47,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:42:47,777 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:47,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:47,778 INFO L225 Difference]: With dead ends: 80 [2020-10-16 11:42:47,778 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 11:42:47,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 11:42:47,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 11:42:47,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-16 11:42:47,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 11:42:47,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-10-16 11:42:47,780 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-10-16 11:42:47,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:47,781 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-10-16 11:42:47,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:47,781 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-10-16 11:42:47,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:47,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:47,781 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:47,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:47,988 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:47,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:47,989 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-10-16 11:42:47,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:47,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406852697] [2020-10-16 11:42:47,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:48,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406852697] [2020-10-16 11:42:48,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444074266] [2020-10-16 11:42:48,113 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 [2020-10-16 11:42:48,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 11:42:48,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:48,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:48,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:48,181 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:48,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:48,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:48,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790053589] [2020-10-16 11:42:48,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:48,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:48,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:48,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:48,198 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-10-16 11:42:48,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:48,859 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-16 11:42:48,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:42:48,860 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:48,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:48,861 INFO L225 Difference]: With dead ends: 92 [2020-10-16 11:42:48,861 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 11:42:48,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:42:48,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 11:42:48,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-10-16 11:42:48,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:42:48,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-16 11:42:48,864 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-10-16 11:42:48,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:48,864 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-16 11:42:48,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:48,864 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-16 11:42:48,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:48,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:48,865 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:49,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:49,067 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:49,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:49,067 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-10-16 11:42:49,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:49,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337913668] [2020-10-16 11:42:49,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:49,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337913668] [2020-10-16 11:42:49,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857021435] [2020-10-16 11:42:49,190 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 [2020-10-16 11:42:49,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:49,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:49,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:49,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:49,257 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:49,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:49,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:49,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220496224] [2020-10-16 11:42:49,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:49,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:49,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:49,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:49,275 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-10-16 11:42:49,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:49,991 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-10-16 11:42:49,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:42:49,991 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:49,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:49,992 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:42:49,993 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 11:42:49,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:42:49,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 11:42:49,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-16 11:42:49,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 11:42:49,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-16 11:42:49,996 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-10-16 11:42:49,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:49,996 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-16 11:42:49,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:49,997 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-16 11:42:49,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:49,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:49,997 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:50,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-16 11:42:50,201 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:50,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:50,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-10-16 11:42:50,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:50,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824533968] [2020-10-16 11:42:50,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:50,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824533968] [2020-10-16 11:42:50,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309917085] [2020-10-16 11:42:50,363 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 [2020-10-16 11:42:50,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 11:42:50,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:50,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:50,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:50,424 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:50,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:50,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:50,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085265122] [2020-10-16 11:42:50,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:50,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:50,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:50,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:50,425 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-10-16 11:42:50,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:50,718 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-16 11:42:50,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:42:50,718 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:50,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:50,719 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:42:50,720 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 11:42:50,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:42:50,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 11:42:50,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-16 11:42:50,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-16 11:42:50,722 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-10-16 11:42:50,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:50,722 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-16 11:42:50,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:50,722 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-16 11:42:50,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:50,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:50,723 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:50,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:50,924 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:50,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:50,924 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-10-16 11:42:50,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:50,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52482877] [2020-10-16 11:42:50,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:51,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52482877] [2020-10-16 11:42:51,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144429995] [2020-10-16 11:42:51,115 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 [2020-10-16 11:42:51,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 11:42:51,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:51,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:51,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:51,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:51,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:51,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:51,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620791774] [2020-10-16 11:42:51,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:51,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:51,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:51,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:51,203 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-10-16 11:42:51,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:51,559 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-10-16 11:42:51,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:51,560 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:51,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:51,561 INFO L225 Difference]: With dead ends: 98 [2020-10-16 11:42:51,561 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 11:42:51,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:42:51,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 11:42:51,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-10-16 11:42:51,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 11:42:51,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-10-16 11:42:51,563 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-10-16 11:42:51,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:51,563 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-10-16 11:42:51,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:51,563 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-10-16 11:42:51,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:51,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:51,563 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:51,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-16 11:42:51,767 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:51,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:51,768 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-10-16 11:42:51,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:51,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165186867] [2020-10-16 11:42:51,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:51,952 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:51,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165186867] [2020-10-16 11:42:51,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069660592] [2020-10-16 11:42:51,953 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 [2020-10-16 11:42:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:52,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:52,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:52,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:52,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:52,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77723819] [2020-10-16 11:42:52,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:52,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:52,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:52,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:52,012 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-10-16 11:42:52,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:52,393 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-16 11:42:52,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:42:52,394 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:52,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:52,395 INFO L225 Difference]: With dead ends: 99 [2020-10-16 11:42:52,395 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 11:42:52,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:42:52,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 11:42:52,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-10-16 11:42:52,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:52,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-10-16 11:42:52,399 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-10-16 11:42:52,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:52,399 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-10-16 11:42:52,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:52,400 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-10-16 11:42:52,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:52,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:52,400 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:52,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:52,601 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:52,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:52,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-10-16 11:42:52,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:52,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802518130] [2020-10-16 11:42:52,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:52,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802518130] [2020-10-16 11:42:52,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173665561] [2020-10-16 11:42:52,788 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 [2020-10-16 11:42:52,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:52,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:52,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:52,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:52,853 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:52,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:52,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:52,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685609524] [2020-10-16 11:42:52,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:52,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:52,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:52,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:52,865 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-10-16 11:42:53,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:53,304 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-10-16 11:42:53,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:53,305 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:53,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:53,306 INFO L225 Difference]: With dead ends: 109 [2020-10-16 11:42:53,306 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 11:42:53,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 11:42:53,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 11:42:53,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-10-16 11:42:53,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:53,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-10-16 11:42:53,309 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-10-16 11:42:53,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:53,309 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-10-16 11:42:53,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:53,310 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-10-16 11:42:53,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:53,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:53,310 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:53,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:53,520 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:53,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:53,520 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-10-16 11:42:53,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:53,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909139553] [2020-10-16 11:42:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:53,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909139553] [2020-10-16 11:42:53,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680932625] [2020-10-16 11:42:53,691 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 [2020-10-16 11:42:53,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 11:42:53,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:53,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:53,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:53,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:53,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:53,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570257204] [2020-10-16 11:42:53,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:53,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:53,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:53,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:53,761 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-10-16 11:42:54,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:54,198 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-10-16 11:42:54,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:54,199 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:54,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:54,200 INFO L225 Difference]: With dead ends: 109 [2020-10-16 11:42:54,200 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 11:42:54,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:42:54,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 11:42:54,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-10-16 11:42:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 11:42:54,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-16 11:42:54,204 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-10-16 11:42:54,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:54,204 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-16 11:42:54,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:54,204 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-16 11:42:54,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:54,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:54,205 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:54,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-16 11:42:54,409 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:54,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:54,409 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-10-16 11:42:54,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:54,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39234442] [2020-10-16 11:42:54,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:54,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39234442] [2020-10-16 11:42:54,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18361130] [2020-10-16 11:42:54,568 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 [2020-10-16 11:42:54,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:54,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:54,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:54,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:54,638 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:54,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:54,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:54,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720243055] [2020-10-16 11:42:54,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:54,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:54,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:54,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:54,650 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-10-16 11:42:55,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:55,170 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-10-16 11:42:55,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:42:55,170 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:55,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:55,172 INFO L225 Difference]: With dead ends: 106 [2020-10-16 11:42:55,172 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 11:42:55,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:42:55,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 11:42:55,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-16 11:42:55,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:42:55,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-16 11:42:55,174 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-10-16 11:42:55,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:55,174 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-16 11:42:55,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:55,174 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-16 11:42:55,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:55,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:55,175 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:55,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-16 11:42:55,376 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:55,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:55,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-10-16 11:42:55,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:55,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316292180] [2020-10-16 11:42:55,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:55,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316292180] [2020-10-16 11:42:55,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668539123] [2020-10-16 11:42:55,535 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 [2020-10-16 11:42:55,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 11:42:55,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:55,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:55,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:55,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:55,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:55,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864406614] [2020-10-16 11:42:55,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:55,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:55,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:55,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:55,605 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-10-16 11:42:56,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:56,114 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-10-16 11:42:56,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:42:56,115 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:56,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:56,116 INFO L225 Difference]: With dead ends: 107 [2020-10-16 11:42:56,116 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:42:56,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 11:42:56,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:42:56,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-16 11:42:56,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 11:42:56,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-10-16 11:42:56,119 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-10-16 11:42:56,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:56,119 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-10-16 11:42:56,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:56,119 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-10-16 11:42:56,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:56,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:56,119 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:56,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:56,320 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:56,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:56,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-10-16 11:42:56,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:56,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424132172] [2020-10-16 11:42:56,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:56,457 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:56,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424132172] [2020-10-16 11:42:56,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164867446] [2020-10-16 11:42:56,458 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 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 [2020-10-16 11:42:56,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 11:42:56,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:56,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:56,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:56,546 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:56,556 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:56,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:56,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:56,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147317184] [2020-10-16 11:42:56,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:56,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:56,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:56,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:56,558 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-10-16 11:42:57,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:57,145 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-10-16 11:42:57,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:42:57,146 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:57,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:57,147 INFO L225 Difference]: With dead ends: 104 [2020-10-16 11:42:57,147 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:42:57,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:42:57,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:42:57,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-10-16 11:42:57,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:42:57,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-16 11:42:57,150 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-10-16 11:42:57,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:57,150 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-16 11:42:57,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:57,151 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-16 11:42:57,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:57,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:57,151 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:57,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-16 11:42:57,356 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:57,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:57,356 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-10-16 11:42:57,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:57,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661043422] [2020-10-16 11:42:57,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:57,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661043422] [2020-10-16 11:42:57,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595518637] [2020-10-16 11:42:57,508 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 [2020-10-16 11:42:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:57,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:57,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:57,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:57,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:57,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069213351] [2020-10-16 11:42:57,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:57,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:57,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:57,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:57,569 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-10-16 11:42:58,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:58,105 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-10-16 11:42:58,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:42:58,106 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:58,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:58,107 INFO L225 Difference]: With dead ends: 105 [2020-10-16 11:42:58,107 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 11:42:58,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 11:42:58,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 11:42:58,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-16 11:42:58,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:58,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:58,110 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-10-16 11:42:58,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:58,110 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:58,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:58,111 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:58,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:58,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:58,111 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:58,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:58,315 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:58,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:58,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-10-16 11:42:58,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:58,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813530007] [2020-10-16 11:42:58,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:58,468 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:58,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813530007] [2020-10-16 11:42:58,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719996995] [2020-10-16 11:42:58,468 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 [2020-10-16 11:42:58,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:58,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:58,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:58,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:58,533 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:58,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:58,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:58,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071212116] [2020-10-16 11:42:58,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:58,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:58,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:58,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:58,546 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-10-16 11:42:59,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:59,223 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-10-16 11:42:59,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:42:59,224 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:59,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:59,225 INFO L225 Difference]: With dead ends: 102 [2020-10-16 11:42:59,225 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 11:42:59,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 11:42:59,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 11:42:59,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-10-16 11:42:59,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:59,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:59,227 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-10-16 11:42:59,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:59,228 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:59,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:59,228 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:59,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:59,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:59,228 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:59,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-16 11:42:59,429 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:59,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:59,430 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-10-16 11:42:59,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:59,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672478266] [2020-10-16 11:42:59,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:59,574 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:59,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672478266] [2020-10-16 11:42:59,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217579722] [2020-10-16 11:42:59,575 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 [2020-10-16 11:42:59,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 11:42:59,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:59,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:59,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:59,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:59,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:59,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962956703] [2020-10-16 11:42:59,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:59,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:59,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:59,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:59,644 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-10-16 11:43:00,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:00,222 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-10-16 11:43:00,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:43:00,222 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:43:00,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:00,223 INFO L225 Difference]: With dead ends: 103 [2020-10-16 11:43:00,223 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 11:43:00,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:43:00,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 11:43:00,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-10-16 11:43:00,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 11:43:00,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-16 11:43:00,226 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-10-16 11:43:00,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:00,227 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-16 11:43:00,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:43:00,227 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-16 11:43:00,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:43:00,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:00,227 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:00,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:00,434 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:00,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:00,434 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-10-16 11:43:00,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:00,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096544353] [2020-10-16 11:43:00,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:00,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096544353] [2020-10-16 11:43:00,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354727912] [2020-10-16 11:43:00,575 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 [2020-10-16 11:43:00,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:00,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:00,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:43:00,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:00,644 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:00,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:00,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:43:00,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153562587] [2020-10-16 11:43:00,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:00,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:00,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:00,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:00,660 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-16 11:43:01,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:01,405 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-10-16 11:43:01,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:43:01,406 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:43:01,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:01,406 INFO L225 Difference]: With dead ends: 100 [2020-10-16 11:43:01,406 INFO L226 Difference]: Without dead ends: 94 [2020-10-16 11:43:01,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:43:01,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-16 11:43:01,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-16 11:43:01,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:43:01,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-16 11:43:01,409 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-10-16 11:43:01,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:01,410 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-16 11:43:01,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:01,410 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-16 11:43:01,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:43:01,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:01,410 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:01,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-16 11:43:01,618 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:01,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:01,618 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-10-16 11:43:01,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:01,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975352746] [2020-10-16 11:43:01,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:01,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:01,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975352746] [2020-10-16 11:43:01,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238304167] [2020-10-16 11:43:01,761 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 [2020-10-16 11:43:01,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 11:43:01,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:01,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:43:01,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:01,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:01,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:43:01,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896319154] [2020-10-16 11:43:01,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:43:01,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:01,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:43:01,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:43:01,873 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-10-16 11:43:02,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:02,725 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-16 11:43:02,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:43:02,726 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:43:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:02,726 INFO L225 Difference]: With dead ends: 120 [2020-10-16 11:43:02,726 INFO L226 Difference]: Without dead ends: 114 [2020-10-16 11:43:02,727 INFO L677 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 [2020-10-16 11:43:02,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-16 11:43:02,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-10-16 11:43:02,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:43:02,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-10-16 11:43:02,729 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-10-16 11:43:02,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:02,730 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-10-16 11:43:02,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:43:02,730 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-10-16 11:43:02,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:43:02,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:02,731 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:02,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-16 11:43:02,939 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:02,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:02,940 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-10-16 11:43:02,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:02,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20265610] [2020-10-16 11:43:02,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:03,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20265610] [2020-10-16 11:43:03,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302934098] [2020-10-16 11:43:03,139 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 [2020-10-16 11:43:03,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 11:43:03,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:03,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:03,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:03,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:03,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:43:03,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002610774] [2020-10-16 11:43:03,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:03,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:03,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:03,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:03,264 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-10-16 11:43:04,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:04,019 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-10-16 11:43:04,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:43:04,020 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:43:04,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:04,020 INFO L225 Difference]: With dead ends: 101 [2020-10-16 11:43:04,020 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 11:43:04,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:43:04,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 11:43:04,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-16 11:43:04,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 11:43:04,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-16 11:43:04,023 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-16 11:43:04,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:04,023 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-16 11:43:04,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:04,023 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-16 11:43:04,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:04,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:04,023 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:04,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:04,224 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:04,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:04,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-10-16 11:43:04,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:04,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506377699] [2020-10-16 11:43:04,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:04,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506377699] [2020-10-16 11:43:04,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455227170] [2020-10-16 11:43:04,437 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 [2020-10-16 11:43:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:04,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:04,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:04,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:04,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:43:04,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528997576] [2020-10-16 11:43:04,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:04,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:04,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:04,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:04,492 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-16 11:43:04,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:04,864 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-10-16 11:43:04,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:43:04,865 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:43:04,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:04,866 INFO L225 Difference]: With dead ends: 114 [2020-10-16 11:43:04,866 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 11:43:04,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:43:04,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 11:43:04,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-10-16 11:43:04,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:43:04,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:43:04,868 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:43:04,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:04,868 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:43:04,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:04,869 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:43:04,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:04,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:04,869 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:05,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:05,071 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:05,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:05,071 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-10-16 11:43:05,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:05,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618254689] [2020-10-16 11:43:05,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:05,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618254689] [2020-10-16 11:43:05,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437497348] [2020-10-16 11:43:05,286 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 [2020-10-16 11:43:05,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:05,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:05,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:05,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:05,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:05,360 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:05,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:05,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:05,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75117294] [2020-10-16 11:43:05,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:05,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:05,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:05,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:05,362 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:43:05,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:05,821 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-10-16 11:43:05,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:43:05,821 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:05,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:05,822 INFO L225 Difference]: With dead ends: 111 [2020-10-16 11:43:05,822 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 11:43:05,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:43:05,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 11:43:05,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-16 11:43:05,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:05,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:43:05,824 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:43:05,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:05,825 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:43:05,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:05,825 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:43:05,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:05,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:05,825 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:06,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-16 11:43:06,035 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:06,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:06,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-10-16 11:43:06,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:06,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206768048] [2020-10-16 11:43:06,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:06,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206768048] [2020-10-16 11:43:06,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682352874] [2020-10-16 11:43:06,225 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 [2020-10-16 11:43:06,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 11:43:06,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:06,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:06,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:06,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:06,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:43:06,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931392402] [2020-10-16 11:43:06,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:06,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:06,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:06,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:06,294 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:43:06,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:06,733 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-16 11:43:06,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:43:06,734 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:43:06,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:06,734 INFO L225 Difference]: With dead ends: 108 [2020-10-16 11:43:06,734 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 11:43:06,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 11:43:06,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 11:43:06,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-16 11:43:06,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:43:06,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:43:06,737 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:43:06,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:06,737 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:43:06,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:06,737 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:43:06,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:06,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:06,738 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:06,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:06,943 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:06,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:06,944 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-10-16 11:43:06,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:06,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663519743] [2020-10-16 11:43:06,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:07,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663519743] [2020-10-16 11:43:07,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804423372] [2020-10-16 11:43:07,141 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 [2020-10-16 11:43:07,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:07,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:07,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:07,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:07,217 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:07,238 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:07,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:07,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:07,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027081939] [2020-10-16 11:43:07,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:07,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:07,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:07,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:07,240 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:43:07,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:07,751 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-10-16 11:43:07,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:43:07,752 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:07,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:07,753 INFO L225 Difference]: With dead ends: 107 [2020-10-16 11:43:07,753 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:43:07,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 11:43:07,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:43:07,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-10-16 11:43:07,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:43:07,755 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:43:07,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:07,755 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:43:07,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:07,755 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:43:07,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:07,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:07,756 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:07,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-16 11:43:07,956 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:07,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:07,957 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-10-16 11:43:07,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:07,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834471837] [2020-10-16 11:43:07,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:08,142 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:08,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834471837] [2020-10-16 11:43:08,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594083336] [2020-10-16 11:43:08,143 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 [2020-10-16 11:43:08,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 11:43:08,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:08,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:08,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:08,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:08,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:43:08,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630594674] [2020-10-16 11:43:08,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:08,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:08,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:08,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:08,207 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:43:08,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:08,691 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-16 11:43:08,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:43:08,691 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:43:08,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:08,692 INFO L225 Difference]: With dead ends: 104 [2020-10-16 11:43:08,692 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:43:08,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:43:08,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:43:08,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-10-16 11:43:08,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:43:08,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:43:08,695 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:43:08,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:08,696 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:43:08,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:08,696 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:43:08,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:08,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:08,696 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:08,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-16 11:43:08,905 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:08,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:08,905 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-10-16 11:43:08,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:08,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714098500] [2020-10-16 11:43:08,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:09,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714098500] [2020-10-16 11:43:09,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724856862] [2020-10-16 11:43:09,092 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 [2020-10-16 11:43:09,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 11:43:09,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:09,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:09,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:09,167 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:09,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:09,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:09,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147884577] [2020-10-16 11:43:09,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:09,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:09,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:09,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:09,180 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:43:09,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:09,810 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-16 11:43:09,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:43:09,810 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:09,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:09,811 INFO L225 Difference]: With dead ends: 103 [2020-10-16 11:43:09,811 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 11:43:09,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 11:43:09,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 11:43:09,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-16 11:43:09,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:09,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:43:09,815 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:43:09,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:09,815 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:43:09,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:09,815 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:43:09,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:09,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:09,816 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:10,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-16 11:43:10,021 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:10,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:10,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-10-16 11:43:10,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:10,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757299746] [2020-10-16 11:43:10,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:10,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:10,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757299746] [2020-10-16 11:43:10,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733501482] [2020-10-16 11:43:10,193 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 [2020-10-16 11:43:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:10,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:10,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:10,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:10,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:43:10,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493403952] [2020-10-16 11:43:10,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:10,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:10,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:10,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:10,255 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:43:10,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:10,800 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-10-16 11:43:10,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:43:10,800 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:43:10,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:10,801 INFO L225 Difference]: With dead ends: 100 [2020-10-16 11:43:10,801 INFO L226 Difference]: Without dead ends: 94 [2020-10-16 11:43:10,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:43:10,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-16 11:43:10,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-10-16 11:43:10,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:43:10,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:43:10,805 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:43:10,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:10,805 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:43:10,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:10,805 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:43:10,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:10,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:10,806 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:11,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:11,015 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:11,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:11,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-10-16 11:43:11,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:11,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617605093] [2020-10-16 11:43:11,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:11,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617605093] [2020-10-16 11:43:11,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158201866] [2020-10-16 11:43:11,200 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 [2020-10-16 11:43:11,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:11,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:11,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:11,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:11,273 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:11,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:11,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:11,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187758295] [2020-10-16 11:43:11,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:11,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:11,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:11,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:11,287 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:43:11,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:11,997 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-16 11:43:12,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:43:12,003 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:12,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:12,003 INFO L225 Difference]: With dead ends: 99 [2020-10-16 11:43:12,003 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 11:43:12,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:43:12,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 11:43:12,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-16 11:43:12,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:12,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:43:12,005 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:43:12,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:12,006 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:43:12,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:12,006 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:43:12,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:12,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:12,006 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:12,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-16 11:43:12,214 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:12,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:12,214 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-10-16 11:43:12,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:12,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769817872] [2020-10-16 11:43:12,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:12,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769817872] [2020-10-16 11:43:12,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741988002] [2020-10-16 11:43:12,379 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 [2020-10-16 11:43:12,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 11:43:12,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:12,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:12,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:12,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:12,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:43:12,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681001566] [2020-10-16 11:43:12,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:12,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:12,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:12,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:12,444 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:43:13,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:13,040 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-16 11:43:13,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:43:13,041 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:43:13,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:13,042 INFO L225 Difference]: With dead ends: 96 [2020-10-16 11:43:13,042 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 11:43:13,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 11:43:13,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 11:43:13,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-10-16 11:43:13,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:43:13,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:43:13,044 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:43:13,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:13,045 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:43:13,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:13,045 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:43:13,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:13,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:13,045 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:13,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:13,248 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:13,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:13,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-10-16 11:43:13,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:13,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367340383] [2020-10-16 11:43:13,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:13,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367340383] [2020-10-16 11:43:13,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071675735] [2020-10-16 11:43:13,414 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 [2020-10-16 11:43:13,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:13,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:13,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:13,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:13,483 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:13,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:13,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:13,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163812718] [2020-10-16 11:43:13,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:13,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:13,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:13,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:13,497 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:43:14,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:14,298 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-16 11:43:14,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:43:14,298 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:14,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:14,299 INFO L225 Difference]: With dead ends: 95 [2020-10-16 11:43:14,299 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 11:43:14,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 11:43:14,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 11:43:14,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-10-16 11:43:14,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:14,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:43:14,302 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:43:14,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:14,303 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:43:14,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:14,303 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:43:14,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:14,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:14,303 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:14,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:14,512 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:14,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:14,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-10-16 11:43:14,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:14,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313695945] [2020-10-16 11:43:14,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:14,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313695945] [2020-10-16 11:43:14,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361354842] [2020-10-16 11:43:14,678 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 [2020-10-16 11:43:14,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 11:43:14,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:14,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:14,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:14,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:14,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:43:14,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858827295] [2020-10-16 11:43:14,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:14,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:14,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:14,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:14,778 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:43:15,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:15,461 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-16 11:43:15,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:43:15,462 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:43:15,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:15,463 INFO L225 Difference]: With dead ends: 92 [2020-10-16 11:43:15,463 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 11:43:15,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:43:15,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 11:43:15,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-10-16 11:43:15,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:43:15,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:43:15,467 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:43:15,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:15,467 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:43:15,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:15,467 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:43:15,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:15,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:15,468 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:15,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:15,679 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:15,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:15,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-10-16 11:43:15,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:15,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540854805] [2020-10-16 11:43:15,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:15,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540854805] [2020-10-16 11:43:15,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219266870] [2020-10-16 11:43:15,842 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 [2020-10-16 11:43:15,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 11:43:15,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:15,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:15,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:15,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:15,929 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:15,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:15,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:15,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426741249] [2020-10-16 11:43:15,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:15,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:15,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:15,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:15,930 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:43:16,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:16,817 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-10-16 11:43:16,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:43:16,818 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:16,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:16,818 INFO L225 Difference]: With dead ends: 91 [2020-10-16 11:43:16,818 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 11:43:16,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 11:43:16,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 11:43:16,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-16 11:43:16,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:16,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:43:16,821 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:43:16,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:16,821 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:43:16,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:16,822 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:43:16,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:16,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:16,822 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:17,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:17,023 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:17,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:17,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-10-16 11:43:17,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:17,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094617922] [2020-10-16 11:43:17,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:17,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094617922] [2020-10-16 11:43:17,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589848259] [2020-10-16 11:43:17,183 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 [2020-10-16 11:43:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:17,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:17,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:17,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:17,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:43:17,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726566067] [2020-10-16 11:43:17,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:17,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:17,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:17,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:17,258 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:43:18,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:18,023 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-16 11:43:18,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:43:18,023 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:43:18,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:18,024 INFO L225 Difference]: With dead ends: 107 [2020-10-16 11:43:18,024 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:43:18,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:43:18,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:43:18,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-16 11:43:18,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 11:43:18,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-10-16 11:43:18,028 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-10-16 11:43:18,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:18,028 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-10-16 11:43:18,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:18,029 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-10-16 11:43:18,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:18,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:18,030 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:18,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-16 11:43:18,230 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:18,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:18,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-10-16 11:43:18,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:18,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5501976] [2020-10-16 11:43:18,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:18,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:18,381 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:18,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5501976] [2020-10-16 11:43:18,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217262683] [2020-10-16 11:43:18,382 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 [2020-10-16 11:43:18,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:18,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:18,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:18,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:18,449 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:18,462 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:18,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:18,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:18,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207898376] [2020-10-16 11:43:18,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:18,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:18,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:18,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:18,464 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-10-16 11:43:19,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:19,372 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-10-16 11:43:19,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:43:19,373 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:19,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:19,373 INFO L225 Difference]: With dead ends: 88 [2020-10-16 11:43:19,374 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 11:43:19,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:43:19,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 11:43:19,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-16 11:43:19,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:43:19,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-10-16 11:43:19,376 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-10-16 11:43:19,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:19,376 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-10-16 11:43:19,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:19,377 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-10-16 11:43:19,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:19,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:19,377 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:19,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-16 11:43:19,580 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:19,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:19,580 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-10-16 11:43:19,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:19,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196396098] [2020-10-16 11:43:19,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:19,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196396098] [2020-10-16 11:43:19,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967748467] [2020-10-16 11:43:19,739 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 [2020-10-16 11:43:19,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 11:43:19,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:19,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:19,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:19,817 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:43:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:19,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:19,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:19,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621764986] [2020-10-16 11:43:19,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:19,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:19,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:19,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:19,837 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-10-16 11:43:20,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:20,672 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-10-16 11:43:20,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:43:20,672 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:20,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:20,673 INFO L225 Difference]: With dead ends: 100 [2020-10-16 11:43:20,673 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 11:43:20,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:43:20,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 11:43:20,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-16 11:43:20,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:43:20,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-16 11:43:20,675 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-10-16 11:43:20,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:20,676 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-16 11:43:20,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:20,676 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-16 11:43:20,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:20,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:20,676 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:20,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-16 11:43:20,881 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:20,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:20,881 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-10-16 11:43:20,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:20,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657105807] [2020-10-16 11:43:20,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:21,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657105807] [2020-10-16 11:43:21,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647124515] [2020-10-16 11:43:21,053 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 [2020-10-16 11:43:21,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:21,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:21,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:21,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:21,120 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:43:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:21,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:21,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:21,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051033820] [2020-10-16 11:43:21,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:21,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:21,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:21,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:21,140 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-10-16 11:43:22,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:22,057 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-10-16 11:43:22,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:43:22,058 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:22,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:22,058 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:43:22,058 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 11:43:22,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 11:43:22,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 11:43:22,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-10-16 11:43:22,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:43:22,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-16 11:43:22,061 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-10-16 11:43:22,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:22,062 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-16 11:43:22,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:22,062 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-16 11:43:22,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:22,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:22,063 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:22,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-16 11:43:22,267 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:22,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:22,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-10-16 11:43:22,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:22,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416010195] [2020-10-16 11:43:22,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:22,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416010195] [2020-10-16 11:43:22,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483530129] [2020-10-16 11:43:22,502 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 [2020-10-16 11:43:22,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:22,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:22,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:22,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:22,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:22,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:22,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502154540] [2020-10-16 11:43:22,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:22,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:22,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:22,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:22,560 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-10-16 11:43:22,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:22,948 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-10-16 11:43:22,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:43:22,949 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:22,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:22,949 INFO L225 Difference]: With dead ends: 90 [2020-10-16 11:43:22,949 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 11:43:22,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:43:22,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 11:43:22,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-16 11:43:22,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:43:22,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-16 11:43:22,951 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-10-16 11:43:22,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:22,952 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-16 11:43:22,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:22,952 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-16 11:43:22,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:22,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:22,952 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:23,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:23,156 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:23,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:23,156 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-10-16 11:43:23,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:23,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922787021] [2020-10-16 11:43:23,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:23,394 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:23,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922787021] [2020-10-16 11:43:23,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357284811] [2020-10-16 11:43:23,395 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 [2020-10-16 11:43:23,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:43:23,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:23,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:23,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:23,467 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:23,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:23,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:23,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410282589] [2020-10-16 11:43:23,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:23,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:23,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:23,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:23,480 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-10-16 11:43:23,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:23,927 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-10-16 11:43:23,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:43:23,928 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:23,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:23,929 INFO L225 Difference]: With dead ends: 106 [2020-10-16 11:43:23,929 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 11:43:23,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:43:23,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 11:43:23,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-16 11:43:23,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:43:23,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-10-16 11:43:23,933 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-10-16 11:43:23,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:23,933 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-10-16 11:43:23,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:23,934 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-10-16 11:43:23,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:23,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:23,934 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:24,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-16 11:43:24,141 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:24,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:24,141 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-10-16 11:43:24,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:24,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230548709] [2020-10-16 11:43:24,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:24,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:24,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230548709] [2020-10-16 11:43:24,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73805047] [2020-10-16 11:43:24,369 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 [2020-10-16 11:43:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:24,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:24,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:24,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:24,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:24,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256162790] [2020-10-16 11:43:24,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:24,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:24,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:24,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:24,434 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-10-16 11:43:24,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:24,906 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-10-16 11:43:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:43:24,907 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:24,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:24,908 INFO L225 Difference]: With dead ends: 107 [2020-10-16 11:43:24,908 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:43:24,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:43:24,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:43:24,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-16 11:43:24,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 11:43:24,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-10-16 11:43:24,910 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-10-16 11:43:24,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:24,911 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-10-16 11:43:24,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:24,911 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-10-16 11:43:24,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:24,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:24,911 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:25,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-16 11:43:25,119 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:25,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:25,119 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-10-16 11:43:25,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:25,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544458937] [2020-10-16 11:43:25,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:25,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544458937] [2020-10-16 11:43:25,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546200430] [2020-10-16 11:43:25,345 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 [2020-10-16 11:43:25,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:25,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:25,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:25,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:25,423 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:25,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:25,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:25,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725583199] [2020-10-16 11:43:25,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:25,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:25,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:25,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:25,436 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-10-16 11:43:25,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:25,949 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-10-16 11:43:25,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:43:25,950 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:25,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:25,951 INFO L225 Difference]: With dead ends: 119 [2020-10-16 11:43:25,951 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:43:25,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:43:25,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:43:25,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-10-16 11:43:25,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:43:25,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-10-16 11:43:25,953 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-10-16 11:43:25,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:25,954 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-10-16 11:43:25,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:25,954 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-10-16 11:43:25,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:25,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:25,954 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:26,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-16 11:43:26,155 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:26,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:26,155 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-10-16 11:43:26,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:26,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687354658] [2020-10-16 11:43:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:26,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687354658] [2020-10-16 11:43:26,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840181696] [2020-10-16 11:43:26,372 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 [2020-10-16 11:43:26,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 11:43:26,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:26,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:26,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:26,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:26,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:26,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783928642] [2020-10-16 11:43:26,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:26,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:26,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:26,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:26,437 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-10-16 11:43:26,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:26,968 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-10-16 11:43:26,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:43:26,968 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:26,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:26,969 INFO L225 Difference]: With dead ends: 119 [2020-10-16 11:43:26,969 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:43:26,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 11:43:26,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:43:26,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-10-16 11:43:26,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:43:26,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-10-16 11:43:26,972 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-10-16 11:43:26,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:26,973 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-10-16 11:43:26,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:26,973 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-10-16 11:43:26,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:26,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:26,974 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:27,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:27,184 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:27,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:27,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-10-16 11:43:27,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:27,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338330985] [2020-10-16 11:43:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:27,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338330985] [2020-10-16 11:43:27,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302352708] [2020-10-16 11:43:27,406 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 [2020-10-16 11:43:27,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:27,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:27,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:27,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:27,475 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:27,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:27,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:27,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303064772] [2020-10-16 11:43:27,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:27,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:27,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:27,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:27,488 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-10-16 11:43:28,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:28,112 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-10-16 11:43:28,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:43:28,112 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:28,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:28,113 INFO L225 Difference]: With dead ends: 116 [2020-10-16 11:43:28,113 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 11:43:28,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 11:43:28,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 11:43:28,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-10-16 11:43:28,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:43:28,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-10-16 11:43:28,116 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-10-16 11:43:28,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:28,116 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-10-16 11:43:28,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:28,116 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-10-16 11:43:28,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:28,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:28,117 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:28,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:28,323 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:28,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:28,323 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-10-16 11:43:28,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:28,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564852175] [2020-10-16 11:43:28,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:28,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564852175] [2020-10-16 11:43:28,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45949853] [2020-10-16 11:43:28,523 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 [2020-10-16 11:43:28,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:28,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:28,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:28,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:28,608 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:28,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:28,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:28,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212213756] [2020-10-16 11:43:28,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:28,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:28,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:28,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:28,610 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-10-16 11:43:29,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:29,231 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-10-16 11:43:29,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:43:29,232 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:29,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:29,233 INFO L225 Difference]: With dead ends: 117 [2020-10-16 11:43:29,233 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 11:43:29,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:43:29,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 11:43:29,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-10-16 11:43:29,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 11:43:29,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-16 11:43:29,237 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-10-16 11:43:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:29,237 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-16 11:43:29,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:29,238 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-16 11:43:29,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:29,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:29,239 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:29,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:29,449 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:29,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:29,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-10-16 11:43:29,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:29,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76154562] [2020-10-16 11:43:29,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:29,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:29,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76154562] [2020-10-16 11:43:29,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213258870] [2020-10-16 11:43:29,630 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 [2020-10-16 11:43:29,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:43:29,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:29,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:29,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:29,706 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:29,719 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:29,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:29,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:29,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132578922] [2020-10-16 11:43:29,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:29,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:29,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:29,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:29,720 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-10-16 11:43:30,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:30,393 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-10-16 11:43:30,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:43:30,394 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:30,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:30,394 INFO L225 Difference]: With dead ends: 114 [2020-10-16 11:43:30,395 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 11:43:30,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:43:30,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 11:43:30,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-10-16 11:43:30,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:43:30,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-16 11:43:30,397 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-10-16 11:43:30,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:30,398 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-16 11:43:30,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:30,398 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-16 11:43:30,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:30,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:30,398 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:30,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-16 11:43:30,603 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:30,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:30,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-10-16 11:43:30,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:30,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59549635] [2020-10-16 11:43:30,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:30,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59549635] [2020-10-16 11:43:30,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839213312] [2020-10-16 11:43:30,798 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 [2020-10-16 11:43:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:30,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:30,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:30,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:30,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:30,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35771027] [2020-10-16 11:43:30,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:30,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:30,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:30,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:30,870 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-10-16 11:43:31,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:31,499 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-10-16 11:43:31,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:43:31,500 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:31,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:31,501 INFO L225 Difference]: With dead ends: 115 [2020-10-16 11:43:31,501 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 11:43:31,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 11:43:31,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 11:43:31,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-10-16 11:43:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 11:43:31,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-10-16 11:43:31,504 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-10-16 11:43:31,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:31,504 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-10-16 11:43:31,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:31,504 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-10-16 11:43:31,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:31,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:31,505 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:31,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:31,714 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:31,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:31,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-10-16 11:43:31,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:31,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654066454] [2020-10-16 11:43:31,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:31,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654066454] [2020-10-16 11:43:31,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999214499] [2020-10-16 11:43:31,913 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 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 [2020-10-16 11:43:31,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:31,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:31,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:31,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:31,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:31,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:31,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:31,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697304658] [2020-10-16 11:43:31,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:31,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:31,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:31,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:31,999 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-10-16 11:43:32,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:32,770 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-10-16 11:43:32,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:43:32,771 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:32,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:32,771 INFO L225 Difference]: With dead ends: 112 [2020-10-16 11:43:32,771 INFO L226 Difference]: Without dead ends: 106 [2020-10-16 11:43:32,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:43:32,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-16 11:43:32,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-16 11:43:32,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 11:43:32,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-16 11:43:32,774 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-10-16 11:43:32,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:32,775 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-16 11:43:32,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:32,775 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-16 11:43:32,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:32,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:32,775 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:32,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-16 11:43:32,976 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:32,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:32,976 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-10-16 11:43:32,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:32,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039194134] [2020-10-16 11:43:32,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:32,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:33,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039194134] [2020-10-16 11:43:33,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841333611] [2020-10-16 11:43:33,161 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 [2020-10-16 11:43:33,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 11:43:33,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:33,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:33,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:33,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:33,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:33,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617484613] [2020-10-16 11:43:33,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:33,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:33,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:33,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:33,245 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-10-16 11:43:33,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:33,936 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-10-16 11:43:33,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:43:33,936 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:33,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:33,937 INFO L225 Difference]: With dead ends: 113 [2020-10-16 11:43:33,937 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 11:43:33,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 11:43:33,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 11:43:33,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-16 11:43:33,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:43:33,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:43:33,939 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-10-16 11:43:33,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:33,940 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:43:33,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:33,940 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:43:33,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:33,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:33,940 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:34,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-16 11:43:34,141 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:34,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:34,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-10-16 11:43:34,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:34,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936590401] [2020-10-16 11:43:34,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:34,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936590401] [2020-10-16 11:43:34,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268246762] [2020-10-16 11:43:34,328 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 [2020-10-16 11:43:34,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:34,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:34,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:34,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:34,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:34,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:34,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:34,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428214961] [2020-10-16 11:43:34,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:34,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:34,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:34,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:34,415 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-10-16 11:43:35,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:35,284 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-10-16 11:43:35,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:43:35,285 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:35,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:35,286 INFO L225 Difference]: With dead ends: 110 [2020-10-16 11:43:35,286 INFO L226 Difference]: Without dead ends: 104 [2020-10-16 11:43:35,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 11:43:35,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-16 11:43:35,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-16 11:43:35,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:35,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:43:35,288 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-10-16 11:43:35,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:35,288 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:43:35,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:35,289 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:43:35,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:35,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:35,289 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:35,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-16 11:43:35,490 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:35,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:35,490 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-10-16 11:43:35,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:35,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366692061] [2020-10-16 11:43:35,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:35,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:35,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366692061] [2020-10-16 11:43:35,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446725342] [2020-10-16 11:43:35,673 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 [2020-10-16 11:43:35,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:35,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:35,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:35,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:35,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:35,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:35,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294016129] [2020-10-16 11:43:35,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:35,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:35,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:35,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:35,747 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-10-16 11:43:36,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:36,601 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-16 11:43:36,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:43:36,601 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:36,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:36,602 INFO L225 Difference]: With dead ends: 111 [2020-10-16 11:43:36,602 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 11:43:36,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:43:36,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 11:43:36,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-10-16 11:43:36,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 11:43:36,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-16 11:43:36,604 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-10-16 11:43:36,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:36,604 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-16 11:43:36,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:36,604 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-16 11:43:36,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:36,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:36,604 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:36,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:36,805 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:36,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:36,806 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-10-16 11:43:36,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:36,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986541365] [2020-10-16 11:43:36,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:36,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986541365] [2020-10-16 11:43:36,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240720858] [2020-10-16 11:43:36,986 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 [2020-10-16 11:43:37,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:43:37,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:37,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:37,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:37,064 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:37,076 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:37,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:37,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:37,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510931353] [2020-10-16 11:43:37,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:37,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:37,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:37,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:37,078 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-16 11:43:38,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:38,018 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-10-16 11:43:38,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:43:38,019 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:38,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:38,019 INFO L225 Difference]: With dead ends: 108 [2020-10-16 11:43:38,019 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 11:43:38,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 11:43:38,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 11:43:38,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-16 11:43:38,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:43:38,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-16 11:43:38,021 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-10-16 11:43:38,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:38,021 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-16 11:43:38,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:38,022 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-16 11:43:38,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:38,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:38,022 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:38,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-16 11:43:38,223 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:38,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:38,224 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-10-16 11:43:38,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:38,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647744768] [2020-10-16 11:43:38,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:38,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647744768] [2020-10-16 11:43:38,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997704373] [2020-10-16 11:43:38,405 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 [2020-10-16 11:43:38,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:38,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:38,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:38,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:38,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:38,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59108935] [2020-10-16 11:43:38,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:38,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:38,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:38,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:38,479 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-10-16 11:43:39,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:39,287 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-10-16 11:43:39,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:43:39,288 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:39,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:39,289 INFO L225 Difference]: With dead ends: 128 [2020-10-16 11:43:39,289 INFO L226 Difference]: Without dead ends: 122 [2020-10-16 11:43:39,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 11:43:39,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-16 11:43:39,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-10-16 11:43:39,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:43:39,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-10-16 11:43:39,292 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-10-16 11:43:39,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:39,292 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-10-16 11:43:39,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:39,292 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-10-16 11:43:39,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:39,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:39,293 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:39,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:39,494 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:39,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:39,494 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-10-16 11:43:39,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:39,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170607949] [2020-10-16 11:43:39,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:39,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170607949] [2020-10-16 11:43:39,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626816428] [2020-10-16 11:43:39,676 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 [2020-10-16 11:43:39,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:39,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:39,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:39,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:39,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:39,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:39,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128968060] [2020-10-16 11:43:39,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:39,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:39,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:39,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:39,773 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-10-16 11:43:40,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:40,745 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-10-16 11:43:40,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:43:40,746 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:40,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:40,746 INFO L225 Difference]: With dead ends: 109 [2020-10-16 11:43:40,747 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:43:40,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=733, Invalid=1817, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 11:43:40,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:43:40,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-16 11:43:40,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 11:43:40,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-16 11:43:40,749 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-16 11:43:40,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:40,749 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-16 11:43:40,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:40,749 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-16 11:43:40,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:40,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:40,750 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:40,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:40,950 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:40,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:40,951 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-10-16 11:43:40,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:40,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205729848] [2020-10-16 11:43:40,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:41,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205729848] [2020-10-16 11:43:41,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660697702] [2020-10-16 11:43:41,216 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 [2020-10-16 11:43:41,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 11:43:41,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:41,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:41,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:41,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:41,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:41,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375250243] [2020-10-16 11:43:41,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:41,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:41,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:41,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:41,282 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-16 11:43:41,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:41,754 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-10-16 11:43:41,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:43:41,755 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:41,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:41,756 INFO L225 Difference]: With dead ends: 124 [2020-10-16 11:43:41,756 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 11:43:41,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:43:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 11:43:41,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-10-16 11:43:41,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:41,759 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:41,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:41,759 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:41,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:41,759 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:41,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:41,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:41,759 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:41,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:41,960 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:41,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:41,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-10-16 11:43:41,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:41,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316648428] [2020-10-16 11:43:41,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:42,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316648428] [2020-10-16 11:43:42,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80060479] [2020-10-16 11:43:42,228 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 [2020-10-16 11:43:42,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:42,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:42,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:42,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:42,296 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:42,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:42,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:42,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503500417] [2020-10-16 11:43:42,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:42,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:42,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:42,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:42,310 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:42,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:42,860 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-16 11:43:42,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:43:42,861 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:42,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:42,861 INFO L225 Difference]: With dead ends: 121 [2020-10-16 11:43:42,861 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 11:43:42,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 11:43:42,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 11:43:42,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-10-16 11:43:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:42,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:42,864 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:42,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:42,864 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:42,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:42,864 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:42,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:42,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:42,865 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:43,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:43,066 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:43,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:43,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-10-16 11:43:43,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:43,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009194741] [2020-10-16 11:43:43,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:43,319 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:43,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009194741] [2020-10-16 11:43:43,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202797574] [2020-10-16 11:43:43,320 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 [2020-10-16 11:43:43,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:43,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:43,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:43,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:43,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:43,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:43,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208043829] [2020-10-16 11:43:43,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:43,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:43,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:43,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:43,385 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:43,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:43,900 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-16 11:43:43,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:43:43,901 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:43,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:43,901 INFO L225 Difference]: With dead ends: 118 [2020-10-16 11:43:43,902 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 11:43:43,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:43:43,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 11:43:43,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-10-16 11:43:43,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:43,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:43,904 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:43,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:43,905 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:43,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:43,905 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:43,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:43,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:43,905 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:44,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:44,107 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:44,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:44,108 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-10-16 11:43:44,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:44,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417644962] [2020-10-16 11:43:44,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:44,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417644962] [2020-10-16 11:43:44,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526891354] [2020-10-16 11:43:44,345 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 [2020-10-16 11:43:44,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:43:44,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:44,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:44,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:44,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:44,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:44,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:44,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124949320] [2020-10-16 11:43:44,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:44,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:44,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:44,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:44,433 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:45,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:45,057 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-10-16 11:43:45,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:43:45,058 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:45,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:45,059 INFO L225 Difference]: With dead ends: 117 [2020-10-16 11:43:45,059 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 11:43:45,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:43:45,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 11:43:45,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-10-16 11:43:45,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:45,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:45,061 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:45,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:45,062 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:45,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:45,062 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:45,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:45,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:45,062 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:45,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-16 11:43:45,263 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:45,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:45,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-10-16 11:43:45,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:45,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468378385] [2020-10-16 11:43:45,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:45,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468378385] [2020-10-16 11:43:45,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917653914] [2020-10-16 11:43:45,506 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 [2020-10-16 11:43:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:45,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:45,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:45,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:45,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:45,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842358834] [2020-10-16 11:43:45,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:45,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:45,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:45,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:45,570 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:46,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:46,161 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-16 11:43:46,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:43:46,162 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:46,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:46,163 INFO L225 Difference]: With dead ends: 114 [2020-10-16 11:43:46,163 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 11:43:46,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 11:43:46,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 11:43:46,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-10-16 11:43:46,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:46,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:46,165 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:46,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:46,165 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:46,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:46,165 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:46,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:46,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:46,166 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:46,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-16 11:43:46,373 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:46,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:46,373 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-10-16 11:43:46,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:46,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323231074] [2020-10-16 11:43:46,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:46,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323231074] [2020-10-16 11:43:46,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919994842] [2020-10-16 11:43:46,616 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 [2020-10-16 11:43:46,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:46,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:46,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:46,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:46,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:46,701 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:46,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:46,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:46,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999813482] [2020-10-16 11:43:46,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:46,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:46,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:46,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:46,702 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:47,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:47,437 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-16 11:43:47,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:43:47,437 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:47,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:47,438 INFO L225 Difference]: With dead ends: 113 [2020-10-16 11:43:47,438 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 11:43:47,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 11:43:47,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 11:43:47,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-16 11:43:47,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:47,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:47,440 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:47,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:47,440 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:47,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:47,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:47,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:47,440 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:47,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-16 11:43:47,641 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:47,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:47,642 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-10-16 11:43:47,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:47,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050546566] [2020-10-16 11:43:47,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:47,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050546566] [2020-10-16 11:43:47,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088831479] [2020-10-16 11:43:47,860 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 [2020-10-16 11:43:47,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 11:43:47,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:47,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:47,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:47,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:47,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:47,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030529477] [2020-10-16 11:43:47,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:47,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:47,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:47,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:47,937 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:48,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:48,582 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-10-16 11:43:48,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:43:48,583 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:48,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:48,584 INFO L225 Difference]: With dead ends: 110 [2020-10-16 11:43:48,584 INFO L226 Difference]: Without dead ends: 104 [2020-10-16 11:43:48,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:43:48,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-16 11:43:48,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-16 11:43:48,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:48,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:48,587 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:48,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:48,587 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:48,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:48,587 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:48,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:48,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:48,588 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:48,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-16 11:43:48,789 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:48,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:48,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-10-16 11:43:48,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:48,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50538168] [2020-10-16 11:43:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:48,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:49,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50538168] [2020-10-16 11:43:49,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742689244] [2020-10-16 11:43:49,017 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 [2020-10-16 11:43:49,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:49,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:49,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:49,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:49,096 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:49,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:49,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:49,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069849023] [2020-10-16 11:43:49,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:49,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:49,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:49,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:49,111 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:49,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:49,938 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-10-16 11:43:49,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:43:49,939 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:49,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:49,939 INFO L225 Difference]: With dead ends: 109 [2020-10-16 11:43:49,940 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 11:43:49,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 11:43:49,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 11:43:49,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-10-16 11:43:49,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:49,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:49,942 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:49,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:49,942 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:49,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:49,942 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:49,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:49,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:49,942 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:50,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:50,143 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:50,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:50,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-10-16 11:43:50,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:50,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557186315] [2020-10-16 11:43:50,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:50,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557186315] [2020-10-16 11:43:50,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276042770] [2020-10-16 11:43:50,360 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 [2020-10-16 11:43:50,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:50,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:50,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:50,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:50,428 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:50,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:50,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:50,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358467707] [2020-10-16 11:43:50,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:50,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:50,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:50,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:50,430 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:51,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:51,144 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-10-16 11:43:51,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:43:51,145 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:51,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:51,146 INFO L225 Difference]: With dead ends: 106 [2020-10-16 11:43:51,146 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 11:43:51,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:43:51,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 11:43:51,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-16 11:43:51,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:51,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:51,148 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:51,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:51,149 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:51,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:51,149 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:51,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:51,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:51,150 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:51,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-16 11:43:51,350 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:51,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:51,351 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-10-16 11:43:51,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:51,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657627872] [2020-10-16 11:43:51,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:51,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657627872] [2020-10-16 11:43:51,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089066858] [2020-10-16 11:43:51,570 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 [2020-10-16 11:43:51,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:43:51,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:51,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:51,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:51,645 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:51,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:51,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:51,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178380991] [2020-10-16 11:43:51,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:51,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:51,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:51,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:51,661 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:52,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:52,581 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-10-16 11:43:52,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:43:52,582 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:52,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:52,582 INFO L225 Difference]: With dead ends: 105 [2020-10-16 11:43:52,583 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 11:43:52,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:43:52,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 11:43:52,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-10-16 11:43:52,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:52,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:52,585 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:52,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:52,586 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:52,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:52,586 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:52,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:52,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:52,587 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:52,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:52,787 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:52,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:52,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-10-16 11:43:52,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:52,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981270207] [2020-10-16 11:43:52,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:52,999 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:52,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981270207] [2020-10-16 11:43:52,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656783705] [2020-10-16 11:43:53,000 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 [2020-10-16 11:43:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:53,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:53,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:53,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:53,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:53,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255615438] [2020-10-16 11:43:53,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:53,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:53,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:53,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:53,083 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:53,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:53,859 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-10-16 11:43:53,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:43:53,860 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:53,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:53,861 INFO L225 Difference]: With dead ends: 102 [2020-10-16 11:43:53,861 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 11:43:53,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 11:43:53,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 11:43:53,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-16 11:43:53,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:53,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:53,864 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:53,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:53,864 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:53,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:53,864 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:53,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:53,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:53,864 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:54,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:54,065 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:54,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:54,066 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-10-16 11:43:54,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:54,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033389608] [2020-10-16 11:43:54,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:54,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:54,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033389608] [2020-10-16 11:43:54,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718466757] [2020-10-16 11:43:54,274 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 [2020-10-16 11:43:54,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:54,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:54,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:54,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:54,345 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:54,360 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:54,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:54,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:54,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713624927] [2020-10-16 11:43:54,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:54,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:54,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:54,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:54,362 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:55,378 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-16 11:43:55,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:43:55,379 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:55,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:55,380 INFO L225 Difference]: With dead ends: 101 [2020-10-16 11:43:55,380 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 11:43:55,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 11:43:55,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 11:43:55,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-16 11:43:55,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:55,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:55,383 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:55,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:55,383 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:55,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:55,383 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:55,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:55,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:55,384 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:55,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-16 11:43:55,586 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:55,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:55,586 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-10-16 11:43:55,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:55,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903076773] [2020-10-16 11:43:55,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:55,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903076773] [2020-10-16 11:43:55,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918163506] [2020-10-16 11:43:55,781 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 [2020-10-16 11:43:55,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 11:43:55,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:55,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:55,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:55,867 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:55,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:55,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:55,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032090082] [2020-10-16 11:43:55,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:55,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:55,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:55,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:55,868 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:56,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:56,716 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-16 11:43:56,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:43:56,716 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:56,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:56,717 INFO L225 Difference]: With dead ends: 98 [2020-10-16 11:43:56,717 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 11:43:56,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 11:43:56,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 11:43:56,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-10-16 11:43:56,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:56,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:56,720 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:56,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:56,720 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:56,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:56,720 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:56,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:56,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:56,720 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:56,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:56,921 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:56,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:56,922 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-10-16 11:43:56,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:56,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635834621] [2020-10-16 11:43:56,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:57,124 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:57,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635834621] [2020-10-16 11:43:57,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106058804] [2020-10-16 11:43:57,125 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 [2020-10-16 11:43:57,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:57,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:57,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:57,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:57,206 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:57,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:57,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:57,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275999475] [2020-10-16 11:43:57,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:57,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:57,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:57,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:57,224 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:58,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:58,334 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-10-16 11:43:58,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:43:58,335 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:58,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:58,336 INFO L225 Difference]: With dead ends: 97 [2020-10-16 11:43:58,336 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 11:43:58,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 11:43:58,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 11:43:58,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-16 11:43:58,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:58,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:58,338 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:58,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:58,339 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:58,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:58,339 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:58,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:58,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:58,340 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:58,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-16 11:43:58,540 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:58,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:58,541 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-10-16 11:43:58,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:58,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709413772] [2020-10-16 11:43:58,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:58,742 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:58,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709413772] [2020-10-16 11:43:58,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251477781] [2020-10-16 11:43:58,743 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 [2020-10-16 11:43:58,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:58,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:58,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:58,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:58,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:58,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:58,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185449034] [2020-10-16 11:43:58,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:58,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:58,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:58,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:58,822 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:59,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:59,723 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-16 11:43:59,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:43:59,724 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:59,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:59,725 INFO L225 Difference]: With dead ends: 113 [2020-10-16 11:43:59,725 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 11:43:59,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 11:43:59,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 11:43:59,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-16 11:43:59,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-16 11:43:59,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-10-16 11:43:59,728 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-10-16 11:43:59,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:59,728 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-10-16 11:43:59,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:59,728 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-10-16 11:43:59,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:59,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:59,729 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:59,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-16 11:43:59,929 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:59,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:59,930 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-10-16 11:43:59,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:59,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91001410] [2020-10-16 11:43:59,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:59,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:00,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91001410] [2020-10-16 11:44:00,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458722021] [2020-10-16 11:44:00,138 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 [2020-10-16 11:44:00,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:44:00,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:00,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:44:00,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:00,215 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:00,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:00,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:44:00,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137234606] [2020-10-16 11:44:00,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:00,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:00,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:00,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:00,238 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-10-16 11:44:01,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:01,385 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-10-16 11:44:01,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 11:44:01,386 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:44:01,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:01,386 INFO L225 Difference]: With dead ends: 94 [2020-10-16 11:44:01,386 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 11:44:01,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 11:44:01,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 11:44:01,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-10-16 11:44:01,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 11:44:01,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-10-16 11:44:01,388 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-10-16 11:44:01,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:01,388 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-10-16 11:44:01,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:01,388 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-10-16 11:44:01,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:44:01,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:01,389 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:01,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-16 11:44:01,589 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:01,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:01,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-10-16 11:44:01,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:01,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428490495] [2020-10-16 11:44:01,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:01,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428490495] [2020-10-16 11:44:01,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428738848] [2020-10-16 11:44:01,800 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 [2020-10-16 11:44:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:01,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:44:01,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:01,870 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:44:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:01,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:01,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:44:01,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59901652] [2020-10-16 11:44:01,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:01,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:01,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:01,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:01,892 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-10-16 11:44:02,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:02,966 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-16 11:44:02,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:44:02,967 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:44:02,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:02,967 INFO L225 Difference]: With dead ends: 108 [2020-10-16 11:44:02,967 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 11:44:02,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 11:44:02,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 11:44:02,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-16 11:44:02,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:44:02,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-16 11:44:02,970 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-10-16 11:44:02,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:02,971 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-16 11:44:02,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:02,971 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-16 11:44:02,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:02,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:02,971 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:03,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-16 11:44:03,172 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:03,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:03,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-10-16 11:44:03,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:03,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359176810] [2020-10-16 11:44:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:03,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359176810] [2020-10-16 11:44:03,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765364419] [2020-10-16 11:44:03,400 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 [2020-10-16 11:44:03,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:03,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:03,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:03,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:03,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:44:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:03,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:03,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:03,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783767549] [2020-10-16 11:44:03,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:03,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:03,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:03,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:03,495 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-10-16 11:44:04,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:04,649 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-10-16 11:44:04,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:44:04,650 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:04,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:04,651 INFO L225 Difference]: With dead ends: 90 [2020-10-16 11:44:04,651 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 11:44:04,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 11:44:04,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 11:44:04,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-16 11:44:04,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:44:04,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-16 11:44:04,653 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-10-16 11:44:04,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:04,653 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-16 11:44:04,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:04,653 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-16 11:44:04,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:04,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:04,654 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:04,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:04,855 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:04,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:04,855 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-10-16 11:44:04,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:04,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709439348] [2020-10-16 11:44:04,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:05,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709439348] [2020-10-16 11:44:05,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130658603] [2020-10-16 11:44:05,151 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 [2020-10-16 11:44:05,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:05,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:05,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:05,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:05,220 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:05,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:05,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:05,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102824113] [2020-10-16 11:44:05,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:05,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:05,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:05,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:05,221 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-10-16 11:44:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:05,712 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-10-16 11:44:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:44:05,713 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:05,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:05,714 INFO L225 Difference]: With dead ends: 96 [2020-10-16 11:44:05,714 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 11:44:05,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 11:44:05,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 11:44:05,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-16 11:44:05,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:44:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-16 11:44:05,717 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-10-16 11:44:05,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:05,717 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-16 11:44:05,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-16 11:44:05,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:05,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:05,718 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:05,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:05,918 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:05,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:05,919 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-10-16 11:44:05,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:05,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335870390] [2020-10-16 11:44:05,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:06,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335870390] [2020-10-16 11:44:06,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74343215] [2020-10-16 11:44:06,227 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 [2020-10-16 11:44:06,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:06,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:06,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:06,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:06,301 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:06,311 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:06,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:06,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:06,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275728250] [2020-10-16 11:44:06,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:06,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:06,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:06,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:06,313 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-10-16 11:44:06,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:06,858 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-10-16 11:44:06,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:44:06,859 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:06,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:06,860 INFO L225 Difference]: With dead ends: 114 [2020-10-16 11:44:06,860 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 11:44:06,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 11:44:06,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 11:44:06,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-16 11:44:06,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:44:06,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-10-16 11:44:06,862 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-10-16 11:44:06,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:06,863 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-10-16 11:44:06,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:06,863 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-10-16 11:44:06,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:06,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:06,863 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:07,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:07,064 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:07,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:07,064 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-10-16 11:44:07,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:07,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344511587] [2020-10-16 11:44:07,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:07,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344511587] [2020-10-16 11:44:07,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715999398] [2020-10-16 11:44:07,362 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 [2020-10-16 11:44:07,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:44:07,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:07,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:07,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:07,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:07,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:07,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312560506] [2020-10-16 11:44:07,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:07,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:07,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:07,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:07,434 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-10-16 11:44:08,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:08,022 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-10-16 11:44:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:44:08,023 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:08,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:08,024 INFO L225 Difference]: With dead ends: 115 [2020-10-16 11:44:08,024 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 11:44:08,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 11:44:08,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 11:44:08,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-10-16 11:44:08,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 11:44:08,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-10-16 11:44:08,027 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-10-16 11:44:08,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:08,027 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-10-16 11:44:08,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:08,027 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-10-16 11:44:08,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:08,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:08,028 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:08,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:08,229 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:08,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:08,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-10-16 11:44:08,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:08,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335452775] [2020-10-16 11:44:08,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:08,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335452775] [2020-10-16 11:44:08,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591113710] [2020-10-16 11:44:08,530 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 [2020-10-16 11:44:08,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:44:08,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:08,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:08,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:08,608 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:08,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:08,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:08,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216085420] [2020-10-16 11:44:08,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:08,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:08,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:08,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:08,627 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-10-16 11:44:09,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:09,234 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-10-16 11:44:09,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:44:09,234 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:09,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:09,235 INFO L225 Difference]: With dead ends: 129 [2020-10-16 11:44:09,235 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 11:44:09,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:44:09,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 11:44:09,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-10-16 11:44:09,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:44:09,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-10-16 11:44:09,239 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-10-16 11:44:09,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:09,239 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-10-16 11:44:09,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:09,239 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-10-16 11:44:09,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:09,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:09,240 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:09,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:09,448 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:09,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:09,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-10-16 11:44:09,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:09,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089675183] [2020-10-16 11:44:09,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:09,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089675183] [2020-10-16 11:44:09,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994905299] [2020-10-16 11:44:09,725 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 [2020-10-16 11:44:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:09,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:09,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:09,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:09,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:09,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690826762] [2020-10-16 11:44:09,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:09,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:09,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:09,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:09,790 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-10-16 11:44:10,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:10,440 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-10-16 11:44:10,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:44:10,441 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:10,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:10,442 INFO L225 Difference]: With dead ends: 129 [2020-10-16 11:44:10,442 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 11:44:10,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 11:44:10,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 11:44:10,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-10-16 11:44:10,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 11:44:10,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-10-16 11:44:10,445 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-10-16 11:44:10,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:10,445 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-10-16 11:44:10,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:10,445 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-10-16 11:44:10,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:10,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:10,446 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:10,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:10,646 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:10,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:10,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-10-16 11:44:10,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:10,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244106715] [2020-10-16 11:44:10,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:10,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244106715] [2020-10-16 11:44:10,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254635669] [2020-10-16 11:44:10,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:44:10,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:10,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:10,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:10,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:10,994 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:11,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:11,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:11,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399144063] [2020-10-16 11:44:11,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:11,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:11,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:11,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:11,008 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-10-16 11:44:11,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:11,744 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-10-16 11:44:11,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:44:11,745 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:11,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:11,745 INFO L225 Difference]: With dead ends: 126 [2020-10-16 11:44:11,746 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 11:44:11,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:44:11,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 11:44:11,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-10-16 11:44:11,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 11:44:11,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-10-16 11:44:11,749 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-10-16 11:44:11,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:11,749 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-10-16 11:44:11,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:11,749 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-10-16 11:44:11,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:11,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:11,750 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:11,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:11,954 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:11,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:11,954 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-10-16 11:44:11,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:11,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374877063] [2020-10-16 11:44:11,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:12,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374877063] [2020-10-16 11:44:12,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107070402] [2020-10-16 11:44:12,216 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 [2020-10-16 11:44:12,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:12,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:12,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:12,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:12,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:12,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:12,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129698553] [2020-10-16 11:44:12,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:12,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:12,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:12,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:12,285 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-10-16 11:44:12,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:12,999 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-10-16 11:44:12,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:44:12,999 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:12,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:13,000 INFO L225 Difference]: With dead ends: 127 [2020-10-16 11:44:13,000 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 11:44:13,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 11:44:13,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 11:44:13,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-10-16 11:44:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:44:13,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-10-16 11:44:13,002 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-10-16 11:44:13,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:13,002 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-10-16 11:44:13,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:13,002 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-10-16 11:44:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:13,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:13,003 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:13,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-16 11:44:13,204 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:13,204 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-10-16 11:44:13,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:13,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492520245] [2020-10-16 11:44:13,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:13,472 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:13,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492520245] [2020-10-16 11:44:13,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876876826] [2020-10-16 11:44:13,473 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 [2020-10-16 11:44:13,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:13,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:13,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:13,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:13,547 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:13,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:13,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:13,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345352094] [2020-10-16 11:44:13,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:13,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:13,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:13,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:13,568 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-10-16 11:44:14,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:14,379 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-10-16 11:44:14,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:44:14,380 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:14,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:14,380 INFO L225 Difference]: With dead ends: 124 [2020-10-16 11:44:14,380 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 11:44:14,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 11:44:14,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 11:44:14,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-16 11:44:14,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:44:14,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-10-16 11:44:14,382 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-10-16 11:44:14,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:14,383 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-10-16 11:44:14,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:14,383 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-10-16 11:44:14,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:14,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:14,383 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:14,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-16 11:44:14,584 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:14,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:14,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-10-16 11:44:14,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:14,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784759620] [2020-10-16 11:44:14,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:14,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:14,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784759620] [2020-10-16 11:44:14,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226745536] [2020-10-16 11:44:14,836 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 [2020-10-16 11:44:14,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:44:14,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:14,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:14,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:14,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:14,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:14,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058476976] [2020-10-16 11:44:14,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:14,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:14,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:14,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:14,908 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-10-16 11:44:15,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:15,655 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-10-16 11:44:15,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:44:15,655 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:15,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:15,656 INFO L225 Difference]: With dead ends: 125 [2020-10-16 11:44:15,656 INFO L226 Difference]: Without dead ends: 119 [2020-10-16 11:44:15,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:44:15,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-16 11:44:15,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-10-16 11:44:15,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 11:44:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-16 11:44:15,658 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-10-16 11:44:15,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:15,658 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-16 11:44:15,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:15,658 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-16 11:44:15,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:15,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:15,659 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:15,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-16 11:44:15,859 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:15,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:15,860 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-10-16 11:44:15,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:15,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405567926] [2020-10-16 11:44:15,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:16,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405567926] [2020-10-16 11:44:16,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164379533] [2020-10-16 11:44:16,116 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 [2020-10-16 11:44:16,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:44:16,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:16,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:16,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:16,195 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:16,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:16,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:16,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620175104] [2020-10-16 11:44:16,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:16,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:16,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:16,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:16,211 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-10-16 11:44:17,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:17,138 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-10-16 11:44:17,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:44:17,139 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:17,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:17,139 INFO L225 Difference]: With dead ends: 122 [2020-10-16 11:44:17,139 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 11:44:17,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 11:44:17,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 11:44:17,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-10-16 11:44:17,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:44:17,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-16 11:44:17,142 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-10-16 11:44:17,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:17,142 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-16 11:44:17,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:17,143 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-16 11:44:17,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:17,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:17,143 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:17,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-16 11:44:17,347 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:17,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:17,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-10-16 11:44:17,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:17,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639728404] [2020-10-16 11:44:17,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:17,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639728404] [2020-10-16 11:44:17,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699872133] [2020-10-16 11:44:17,596 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 [2020-10-16 11:44:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:17,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:17,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:17,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:17,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:17,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959917401] [2020-10-16 11:44:17,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:17,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:17,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:17,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:17,664 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-10-16 11:44:18,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:18,497 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-16 11:44:18,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:44:18,497 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:18,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:18,498 INFO L225 Difference]: With dead ends: 123 [2020-10-16 11:44:18,498 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 11:44:18,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 11:44:18,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 11:44:18,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-16 11:44:18,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 11:44:18,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-10-16 11:44:18,501 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-10-16 11:44:18,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:18,501 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-10-16 11:44:18,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:18,501 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-10-16 11:44:18,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:18,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:18,501 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:18,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:18,702 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:18,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:18,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-10-16 11:44:18,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:18,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298874973] [2020-10-16 11:44:18,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:18,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298874973] [2020-10-16 11:44:18,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207130098] [2020-10-16 11:44:18,949 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 [2020-10-16 11:44:18,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:18,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:18,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:18,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:19,027 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:19,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:19,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:19,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480249444] [2020-10-16 11:44:19,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:19,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:19,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:19,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:19,045 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-10-16 11:44:20,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:20,049 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-10-16 11:44:20,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:44:20,050 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:20,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:20,050 INFO L225 Difference]: With dead ends: 120 [2020-10-16 11:44:20,051 INFO L226 Difference]: Without dead ends: 114 [2020-10-16 11:44:20,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 11:44:20,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-16 11:44:20,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-10-16 11:44:20,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 11:44:20,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-16 11:44:20,052 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-10-16 11:44:20,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:20,052 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-16 11:44:20,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:20,053 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-16 11:44:20,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:20,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:20,053 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:20,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:20,254 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:20,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:20,254 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-10-16 11:44:20,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:20,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181425334] [2020-10-16 11:44:20,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:20,492 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:20,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181425334] [2020-10-16 11:44:20,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855770893] [2020-10-16 11:44:20,493 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 [2020-10-16 11:44:20,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:20,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:20,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:20,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:20,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:20,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:20,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611361134] [2020-10-16 11:44:20,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:20,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:20,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:20,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:20,570 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-10-16 11:44:21,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:21,466 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-16 11:44:21,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:44:21,467 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:21,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:21,468 INFO L225 Difference]: With dead ends: 121 [2020-10-16 11:44:21,468 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 11:44:21,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 11:44:21,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 11:44:21,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-16 11:44:21,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:44:21,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:44:21,471 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-10-16 11:44:21,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:21,471 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:44:21,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:21,471 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:44:21,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:21,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:21,472 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:21,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-16 11:44:21,672 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:21,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:21,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-10-16 11:44:21,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:21,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4990212] [2020-10-16 11:44:21,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:21,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4990212] [2020-10-16 11:44:21,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717888728] [2020-10-16 11:44:21,911 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 [2020-10-16 11:44:21,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:21,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:21,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:21,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:21,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:22,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:22,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:22,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917485559] [2020-10-16 11:44:22,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:22,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:22,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:22,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:22,004 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-10-16 11:44:23,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:23,110 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-16 11:44:23,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:44:23,111 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:23,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:23,111 INFO L225 Difference]: With dead ends: 118 [2020-10-16 11:44:23,112 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 11:44:23,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 11:44:23,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 11:44:23,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-16 11:44:23,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:44:23,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:44:23,114 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-10-16 11:44:23,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:23,114 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:44:23,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:23,114 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:44:23,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:23,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:23,115 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:23,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:23,316 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:23,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:23,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-10-16 11:44:23,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:23,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223753194] [2020-10-16 11:44:23,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:23,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223753194] [2020-10-16 11:44:23,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854396711] [2020-10-16 11:44:23,553 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 [2020-10-16 11:44:23,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:44:23,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:23,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:23,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:23,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:23,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:23,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71308947] [2020-10-16 11:44:23,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:23,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:23,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:23,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:23,629 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-10-16 11:44:24,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:24,625 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-10-16 11:44:24,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 11:44:24,625 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:24,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:24,626 INFO L225 Difference]: With dead ends: 119 [2020-10-16 11:44:24,629 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:44:24,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 11:44:24,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:44:24,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-16 11:44:24,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 11:44:24,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-16 11:44:24,631 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-10-16 11:44:24,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:24,632 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-16 11:44:24,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:24,632 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-16 11:44:24,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:24,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:24,632 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:24,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:24,839 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:24,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:24,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-10-16 11:44:24,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:24,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823503466] [2020-10-16 11:44:24,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:25,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823503466] [2020-10-16 11:44:25,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984621439] [2020-10-16 11:44:25,073 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 [2020-10-16 11:44:25,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:44:25,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:25,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:25,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:25,154 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:25,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:25,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:25,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054969107] [2020-10-16 11:44:25,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:25,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:25,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:25,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:25,173 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-16 11:44:26,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:26,373 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-10-16 11:44:26,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 11:44:26,374 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:26,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:26,374 INFO L225 Difference]: With dead ends: 116 [2020-10-16 11:44:26,374 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 11:44:26,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 11:44:26,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 11:44:26,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-10-16 11:44:26,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:44:26,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-16 11:44:26,377 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-10-16 11:44:26,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:26,377 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-16 11:44:26,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:26,377 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-16 11:44:26,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:26,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:26,377 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:26,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:26,578 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:26,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:26,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-10-16 11:44:26,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:26,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17571818] [2020-10-16 11:44:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:26,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17571818] [2020-10-16 11:44:26,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937350121] [2020-10-16 11:44:26,806 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 [2020-10-16 11:44:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:26,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:26,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:26,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:26,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:26,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100068004] [2020-10-16 11:44:26,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:26,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:26,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:26,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:26,879 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-10-16 11:44:27,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:27,907 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-16 11:44:27,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:44:27,908 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:27,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:27,909 INFO L225 Difference]: With dead ends: 136 [2020-10-16 11:44:27,909 INFO L226 Difference]: Without dead ends: 130 [2020-10-16 11:44:27,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 11:44:27,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-16 11:44:27,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-10-16 11:44:27,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 11:44:27,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-10-16 11:44:27,913 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-10-16 11:44:27,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:27,913 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-10-16 11:44:27,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:27,913 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-10-16 11:44:27,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:27,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:27,914 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:28,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:28,123 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:28,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:28,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-10-16 11:44:28,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:28,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242468272] [2020-10-16 11:44:28,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:28,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:28,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242468272] [2020-10-16 11:44:28,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463256063] [2020-10-16 11:44:28,360 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 [2020-10-16 11:44:28,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:28,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:28,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:28,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:28,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:28,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:28,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740208445] [2020-10-16 11:44:28,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:28,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:28,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:28,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:28,462 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-10-16 11:44:29,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:29,676 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-10-16 11:44:29,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 11:44:29,676 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:29,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:29,677 INFO L225 Difference]: With dead ends: 117 [2020-10-16 11:44:29,677 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 11:44:29,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=910, Invalid=2282, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 11:44:29,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 11:44:29,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-10-16 11:44:29,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-16 11:44:29,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-16 11:44:29,679 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-16 11:44:29,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:29,679 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-16 11:44:29,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:29,679 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-16 11:44:29,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:29,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:29,679 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:29,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:29,880 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:29,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:29,881 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-10-16 11:44:29,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:29,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269467942] [2020-10-16 11:44:29,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:30,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269467942] [2020-10-16 11:44:30,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771340481] [2020-10-16 11:44:30,219 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 [2020-10-16 11:44:30,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:30,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:30,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:30,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:30,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:30,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:30,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356321377] [2020-10-16 11:44:30,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:30,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:30,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:30,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:30,287 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-16 11:44:30,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:30,862 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-10-16 11:44:30,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:44:30,863 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:30,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:30,864 INFO L225 Difference]: With dead ends: 134 [2020-10-16 11:44:30,864 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 11:44:30,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 11:44:30,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 11:44:30,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-10-16 11:44:30,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:30,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:30,866 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:30,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:30,867 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:30,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:30,867 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:30,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:30,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:30,867 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:31,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-16 11:44:31,068 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:31,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:31,069 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-10-16 11:44:31,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:31,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312050159] [2020-10-16 11:44:31,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:31,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312050159] [2020-10-16 11:44:31,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574239467] [2020-10-16 11:44:31,412 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 [2020-10-16 11:44:31,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:31,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:31,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:31,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:31,488 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:31,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:31,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:31,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725061900] [2020-10-16 11:44:31,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:31,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:31,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:31,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:31,506 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:32,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:32,187 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-10-16 11:44:32,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:44:32,187 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:32,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:32,188 INFO L225 Difference]: With dead ends: 131 [2020-10-16 11:44:32,188 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 11:44:32,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 11:44:32,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 11:44:32,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-16 11:44:32,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:32,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:32,191 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:32,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:32,191 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:32,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:32,191 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:32,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:32,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:32,191 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:32,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-16 11:44:32,392 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:32,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:32,393 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-10-16 11:44:32,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:32,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728960221] [2020-10-16 11:44:32,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:32,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728960221] [2020-10-16 11:44:32,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494895921] [2020-10-16 11:44:32,708 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 [2020-10-16 11:44:32,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:44:32,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:32,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:32,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:32,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:32,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:32,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035177430] [2020-10-16 11:44:32,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:32,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:32,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:32,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:32,787 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:33,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:33,449 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-10-16 11:44:33,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:44:33,449 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:33,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:33,450 INFO L225 Difference]: With dead ends: 128 [2020-10-16 11:44:33,450 INFO L226 Difference]: Without dead ends: 122 [2020-10-16 11:44:33,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:44:33,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-16 11:44:33,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-10-16 11:44:33,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:33,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:33,453 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:33,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:33,453 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:33,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:33,453 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:33,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:33,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:33,454 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:33,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:33,654 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:33,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:33,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-10-16 11:44:33,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:33,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623754206] [2020-10-16 11:44:33,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:33,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623754206] [2020-10-16 11:44:33,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540805899] [2020-10-16 11:44:33,981 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 [2020-10-16 11:44:34,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:44:34,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:34,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:34,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:34,063 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:34,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:34,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:34,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726589164] [2020-10-16 11:44:34,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:34,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:34,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:34,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:34,078 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:34,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:34,854 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-10-16 11:44:34,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:44:34,855 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:34,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:34,855 INFO L225 Difference]: With dead ends: 127 [2020-10-16 11:44:34,856 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 11:44:34,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 11:44:34,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 11:44:34,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-10-16 11:44:34,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:34,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:34,858 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:34,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:34,858 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:34,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:34,858 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:34,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:34,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:34,858 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:35,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-16 11:44:35,059 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:35,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:35,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-10-16 11:44:35,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:35,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586203517] [2020-10-16 11:44:35,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:35,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586203517] [2020-10-16 11:44:35,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644884548] [2020-10-16 11:44:35,361 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 [2020-10-16 11:44:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:35,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:35,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:35,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:35,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:35,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711320299] [2020-10-16 11:44:35,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:35,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:35,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:35,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:35,429 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:36,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:36,147 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-16 11:44:36,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:44:36,148 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:36,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:36,149 INFO L225 Difference]: With dead ends: 124 [2020-10-16 11:44:36,149 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 11:44:36,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:44:36,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 11:44:36,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-16 11:44:36,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:36,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:36,152 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:36,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:36,152 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:36,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:36,152 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:36,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:36,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:36,152 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:36,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:36,353 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:36,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:36,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-10-16 11:44:36,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:36,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353685569] [2020-10-16 11:44:36,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:36,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353685569] [2020-10-16 11:44:36,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101283588] [2020-10-16 11:44:36,662 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 [2020-10-16 11:44:36,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:36,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:36,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:36,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:36,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:36,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:36,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:36,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626933932] [2020-10-16 11:44:36,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:36,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:36,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:36,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:36,758 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:37,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:37,638 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-16 11:44:37,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:44:37,639 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:37,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:37,640 INFO L225 Difference]: With dead ends: 123 [2020-10-16 11:44:37,640 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 11:44:37,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:44:37,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 11:44:37,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-10-16 11:44:37,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:37,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:37,643 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:37,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:37,643 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:37,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:37,643 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:37,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:37,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:37,644 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:37,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:37,852 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:37,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:37,853 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-10-16 11:44:37,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:37,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92028089] [2020-10-16 11:44:37,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:38,150 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:38,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92028089] [2020-10-16 11:44:38,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84432799] [2020-10-16 11:44:38,151 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 [2020-10-16 11:44:38,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:38,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:38,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:38,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:38,225 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:38,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:38,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:38,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371428803] [2020-10-16 11:44:38,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:38,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:38,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:38,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:38,226 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:39,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:39,017 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-16 11:44:39,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:44:39,018 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:39,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:39,018 INFO L225 Difference]: With dead ends: 120 [2020-10-16 11:44:39,019 INFO L226 Difference]: Without dead ends: 114 [2020-10-16 11:44:39,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 11:44:39,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-16 11:44:39,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-10-16 11:44:39,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:39,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:39,021 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:39,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:39,021 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:39,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:39,021 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:39,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:39,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:39,021 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:39,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:39,222 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:39,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:39,223 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-10-16 11:44:39,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:39,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702140370] [2020-10-16 11:44:39,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:39,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702140370] [2020-10-16 11:44:39,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584975356] [2020-10-16 11:44:39,516 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 [2020-10-16 11:44:39,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:39,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:39,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:39,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:39,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:39,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:39,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:39,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960855174] [2020-10-16 11:44:39,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:39,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:39,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:39,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:39,624 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:40,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:40,613 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-10-16 11:44:40,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:44:40,614 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:40,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:40,615 INFO L225 Difference]: With dead ends: 119 [2020-10-16 11:44:40,616 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:44:40,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 11:44:40,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:44:40,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-10-16 11:44:40,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:40,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:40,618 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:40,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:40,619 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:40,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:40,619 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:40,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:40,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:40,619 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:40,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:40,827 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:40,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:40,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-10-16 11:44:40,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:40,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640200498] [2020-10-16 11:44:40,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:41,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640200498] [2020-10-16 11:44:41,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981385650] [2020-10-16 11:44:41,107 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 [2020-10-16 11:44:41,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:44:41,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:41,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:41,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:41,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:41,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:41,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441284956] [2020-10-16 11:44:41,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:41,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:41,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:41,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:41,187 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:42,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:42,049 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-10-16 11:44:42,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:44:42,050 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:42,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:42,050 INFO L225 Difference]: With dead ends: 116 [2020-10-16 11:44:42,051 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 11:44:42,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 11:44:42,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 11:44:42,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-10-16 11:44:42,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:42,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:42,053 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:42,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:42,054 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:42,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:42,054 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:42,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:42,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:42,054 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:42,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-16 11:44:42,255 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:42,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:42,255 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-10-16 11:44:42,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:42,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685834279] [2020-10-16 11:44:42,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:42,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685834279] [2020-10-16 11:44:42,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141794882] [2020-10-16 11:44:42,538 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 [2020-10-16 11:44:42,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:44:42,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:42,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:42,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:42,617 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:42,633 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:42,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:42,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:42,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673210987] [2020-10-16 11:44:42,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:42,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:42,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:42,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:42,634 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:43,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:43,728 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-10-16 11:44:43,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:44:43,729 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:43,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:43,730 INFO L225 Difference]: With dead ends: 115 [2020-10-16 11:44:43,730 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 11:44:43,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 11:44:43,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 11:44:43,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-16 11:44:43,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:43,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:43,733 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:43,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:43,733 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:43,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:43,733 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:43,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:43,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:43,734 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:43,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:43,940 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:43,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:43,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-10-16 11:44:43,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:43,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705356541] [2020-10-16 11:44:43,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:44,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705356541] [2020-10-16 11:44:44,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068822297] [2020-10-16 11:44:44,211 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 [2020-10-16 11:44:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:44,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:44,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:44,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:44,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:44,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641633353] [2020-10-16 11:44:44,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:44,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:44,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:44,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:44,290 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:45,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:45,214 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-16 11:44:45,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:44:45,215 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:45,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:45,216 INFO L225 Difference]: With dead ends: 112 [2020-10-16 11:44:45,216 INFO L226 Difference]: Without dead ends: 106 [2020-10-16 11:44:45,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 11:44:45,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-16 11:44:45,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-10-16 11:44:45,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:45,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:45,219 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:45,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:45,219 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:45,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:45,220 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:45,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:45,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:45,220 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:45,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-10-16 11:44:45,421 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:45,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:45,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-10-16 11:44:45,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:45,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694171997] [2020-10-16 11:44:45,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:45,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694171997] [2020-10-16 11:44:45,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25651922] [2020-10-16 11:44:45,702 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 [2020-10-16 11:44:45,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:45,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:45,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:45,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:45,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:45,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:45,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:45,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352567740] [2020-10-16 11:44:45,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:45,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:45,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:45,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:45,811 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:46,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:46,994 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-10-16 11:44:46,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:44:46,995 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:46,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:46,996 INFO L225 Difference]: With dead ends: 111 [2020-10-16 11:44:46,996 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 11:44:46,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 11:44:46,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 11:44:46,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-16 11:44:46,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:46,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:46,998 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:46,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:46,998 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:46,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:46,998 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:46,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:46,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:46,999 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:47,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-16 11:44:47,200 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:47,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:47,200 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-10-16 11:44:47,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:47,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566841479] [2020-10-16 11:44:47,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:47,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566841479] [2020-10-16 11:44:47,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155839111] [2020-10-16 11:44:47,462 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 [2020-10-16 11:44:47,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:47,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:47,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:47,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:47,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:47,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:47,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946723266] [2020-10-16 11:44:47,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:47,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:47,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:47,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:47,540 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:48,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:48,536 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-16 11:44:48,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:44:48,537 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:48,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:48,538 INFO L225 Difference]: With dead ends: 108 [2020-10-16 11:44:48,538 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 11:44:48,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 11:44:48,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 11:44:48,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-10-16 11:44:48,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:48,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:48,540 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:48,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:48,540 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:48,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:48,541 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:48,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:48,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:48,541 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:48,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:48,744 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:48,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:48,745 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-10-16 11:44:48,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:48,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915608966] [2020-10-16 11:44:48,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:49,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915608966] [2020-10-16 11:44:49,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695619994] [2020-10-16 11:44:49,011 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 [2020-10-16 11:44:49,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:49,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:49,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:49,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:49,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:49,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:49,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:49,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666625152] [2020-10-16 11:44:49,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:49,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:49,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:49,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:49,108 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:50,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:50,434 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-16 11:44:50,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 11:44:50,435 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:50,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:50,435 INFO L225 Difference]: With dead ends: 107 [2020-10-16 11:44:50,435 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:44:50,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 11:44:50,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:44:50,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-10-16 11:44:50,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:50,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:50,439 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:50,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:50,439 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:50,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:50,440 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:50,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:50,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:50,440 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:50,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:50,643 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:50,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:50,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-10-16 11:44:50,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:50,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675355616] [2020-10-16 11:44:50,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:50,909 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:50,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675355616] [2020-10-16 11:44:50,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019335700] [2020-10-16 11:44:50,909 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 [2020-10-16 11:44:50,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:44:50,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:50,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:50,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:51,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:51,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:51,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015569830] [2020-10-16 11:44:51,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:51,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:51,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:51,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:51,005 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:52,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:52,111 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-10-16 11:44:52,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 11:44:52,112 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:52,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:52,113 INFO L225 Difference]: With dead ends: 104 [2020-10-16 11:44:52,113 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:44:52,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 11:44:52,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:44:52,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-16 11:44:52,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:52,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:52,116 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:52,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:52,117 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:52,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:52,117 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:52,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:52,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:52,117 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:52,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:52,318 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:52,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:52,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-10-16 11:44:52,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:52,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787317197] [2020-10-16 11:44:52,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:52,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787317197] [2020-10-16 11:44:52,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245768053] [2020-10-16 11:44:52,589 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 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 [2020-10-16 11:44:52,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:44:52,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:52,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:52,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:52,678 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:52,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:52,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:52,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865044626] [2020-10-16 11:44:52,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:52,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:52,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:52,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:52,698 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:54,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:54,104 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-10-16 11:44:54,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 11:44:54,105 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:54,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:54,105 INFO L225 Difference]: With dead ends: 103 [2020-10-16 11:44:54,105 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 11:44:54,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 11:44:54,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 11:44:54,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-16 11:44:54,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:54,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:54,109 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:54,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:54,109 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:54,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:54,109 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:54,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:54,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:54,110 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:54,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-10-16 11:44:54,320 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:54,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:54,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-10-16 11:44:54,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:54,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435822587] [2020-10-16 11:44:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:54,593 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:54,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435822587] [2020-10-16 11:44:54,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480268310] [2020-10-16 11:44:54,594 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 [2020-10-16 11:44:54,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:54,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:54,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:54,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:54,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:54,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531895679] [2020-10-16 11:44:54,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:54,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:54,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:54,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:54,675 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:55,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:55,831 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-16 11:44:55,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:44:55,832 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:55,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:55,833 INFO L225 Difference]: With dead ends: 119 [2020-10-16 11:44:55,833 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:44:55,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 11:44:55,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:44:55,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-10-16 11:44:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-16 11:44:55,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-10-16 11:44:55,836 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-10-16 11:44:55,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:55,836 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-10-16 11:44:55,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:55,836 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-10-16 11:44:55,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:55,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:55,837 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:56,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:56,038 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:56,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:56,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-10-16 11:44:56,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:56,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395848254] [2020-10-16 11:44:56,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:56,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395848254] [2020-10-16 11:44:56,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247366336] [2020-10-16 11:44:56,301 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 [2020-10-16 11:44:56,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:56,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:56,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:44:56,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:56,406 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:56,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:56,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:56,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820375854] [2020-10-16 11:44:56,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:56,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:56,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:56,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:56,408 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-10-16 11:44:57,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:57,735 INFO L93 Difference]: Finished difference Result 98 states and 245 transitions. [2020-10-16 11:44:57,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 11:44:57,736 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:57,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:57,736 INFO L225 Difference]: With dead ends: 98 [2020-10-16 11:44:57,736 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 11:44:57,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=924, Invalid=2382, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 11:44:57,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 11:44:57,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 65. [2020-10-16 11:44:57,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 11:44:57,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-10-16 11:44:57,738 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-10-16 11:44:57,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:57,738 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-10-16 11:44:57,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:57,738 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-10-16 11:44:57,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:57,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:57,738 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:57,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:57,939 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:57,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:57,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-10-16 11:44:57,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:57,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676522034] [2020-10-16 11:44:57,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:58,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676522034] [2020-10-16 11:44:58,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477669729] [2020-10-16 11:44:58,202 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 [2020-10-16 11:44:58,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:58,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:58,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:58,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:58,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:44:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:58,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:58,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:58,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463060483] [2020-10-16 11:44:58,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:58,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:58,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:58,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:58,321 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-10-16 11:44:59,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:59,654 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-10-16 11:44:59,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:44:59,654 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:59,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:59,655 INFO L225 Difference]: With dead ends: 116 [2020-10-16 11:44:59,655 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 11:44:59,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 11:44:59,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 11:44:59,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-10-16 11:44:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 11:44:59,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-16 11:44:59,658 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-10-16 11:44:59,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:59,658 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-16 11:44:59,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:59,658 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-16 11:44:59,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:44:59,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:59,658 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:59,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:59,859 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:59,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:59,860 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-10-16 11:44:59,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:59,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770030979] [2020-10-16 11:44:59,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:00,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770030979] [2020-10-16 11:45:00,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727254832] [2020-10-16 11:45:00,163 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 [2020-10-16 11:45:00,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:45:00,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:00,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:00,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:00,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:45:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:00,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:00,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:00,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170696982] [2020-10-16 11:45:00,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:00,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:00,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:00,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:00,268 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-10-16 11:45:01,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:01,749 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-10-16 11:45:01,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:45:01,749 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:01,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:01,750 INFO L225 Difference]: With dead ends: 96 [2020-10-16 11:45:01,750 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 11:45:01,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-16 11:45:01,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 11:45:01,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-16 11:45:01,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:45:01,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-16 11:45:01,752 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-10-16 11:45:01,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:01,752 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-16 11:45:01,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:01,753 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-16 11:45:01,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:01,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:01,753 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:01,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:01,954 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:01,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:01,954 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-10-16 11:45:01,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:01,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96610624] [2020-10-16 11:45:01,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:01,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:02,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96610624] [2020-10-16 11:45:02,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893621952] [2020-10-16 11:45:02,335 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 [2020-10-16 11:45:02,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:45:02,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:02,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:02,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:02,401 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:02,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:02,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:02,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334327947] [2020-10-16 11:45:02,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:02,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:02,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:02,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:02,402 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-10-16 11:45:03,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:03,028 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-10-16 11:45:03,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:45:03,029 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:03,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:03,029 INFO L225 Difference]: With dead ends: 102 [2020-10-16 11:45:03,029 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 11:45:03,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:45:03,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 11:45:03,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-16 11:45:03,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:45:03,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-10-16 11:45:03,032 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-10-16 11:45:03,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:03,032 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-10-16 11:45:03,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:03,033 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-10-16 11:45:03,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:03,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:03,033 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:03,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-10-16 11:45:03,234 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:03,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:03,234 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-10-16 11:45:03,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:03,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170997629] [2020-10-16 11:45:03,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:03,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170997629] [2020-10-16 11:45:03,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470554207] [2020-10-16 11:45:03,616 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 [2020-10-16 11:45:03,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 11:45:03,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:03,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:03,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:03,696 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:03,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:03,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:03,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734172009] [2020-10-16 11:45:03,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:03,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:03,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:03,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:03,709 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-10-16 11:45:04,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:04,352 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-10-16 11:45:04,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:45:04,354 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:04,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:04,354 INFO L225 Difference]: With dead ends: 122 [2020-10-16 11:45:04,354 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 11:45:04,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 11:45:04,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 11:45:04,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-16 11:45:04,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 11:45:04,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-10-16 11:45:04,356 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-10-16 11:45:04,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:04,356 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-10-16 11:45:04,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:04,356 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-10-16 11:45:04,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:04,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:04,357 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:04,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-16 11:45:04,558 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:04,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:04,559 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-10-16 11:45:04,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:04,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169310808] [2020-10-16 11:45:04,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:04,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169310808] [2020-10-16 11:45:04,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732892828] [2020-10-16 11:45:04,941 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 [2020-10-16 11:45:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:04,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:04,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:05,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:05,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:05,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111743973] [2020-10-16 11:45:05,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:05,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:05,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:05,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:05,005 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-10-16 11:45:05,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:05,750 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-10-16 11:45:05,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:45:05,750 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:05,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:05,751 INFO L225 Difference]: With dead ends: 123 [2020-10-16 11:45:05,751 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 11:45:05,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:45:05,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 11:45:05,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-10-16 11:45:05,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:45:05,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-10-16 11:45:05,754 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-10-16 11:45:05,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:05,754 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-10-16 11:45:05,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:05,754 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-10-16 11:45:05,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:05,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:05,754 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:05,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-16 11:45:05,955 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:05,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:05,956 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-10-16 11:45:05,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:05,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19613267] [2020-10-16 11:45:05,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:06,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19613267] [2020-10-16 11:45:06,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190333206] [2020-10-16 11:45:06,341 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:06,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:45:06,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:06,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:06,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:06,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:06,433 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:06,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:06,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:06,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290979037] [2020-10-16 11:45:06,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:06,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:06,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:06,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:06,434 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-10-16 11:45:07,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:07,205 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-10-16 11:45:07,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:45:07,206 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:07,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:07,207 INFO L225 Difference]: With dead ends: 139 [2020-10-16 11:45:07,207 INFO L226 Difference]: Without dead ends: 133 [2020-10-16 11:45:07,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 11:45:07,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-16 11:45:07,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-10-16 11:45:07,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:45:07,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-10-16 11:45:07,210 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-10-16 11:45:07,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:07,210 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-10-16 11:45:07,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:07,211 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-10-16 11:45:07,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:07,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:07,211 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:07,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-16 11:45:07,420 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:07,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:07,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-10-16 11:45:07,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:07,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269161785] [2020-10-16 11:45:07,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:07,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269161785] [2020-10-16 11:45:07,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097110314] [2020-10-16 11:45:07,783 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:07,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 11:45:07,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:07,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:07,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:07,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:07,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:07,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724668309] [2020-10-16 11:45:07,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:07,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:07,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:07,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:07,855 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-10-16 11:45:08,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:08,655 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-10-16 11:45:08,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:45:08,656 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:08,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:08,656 INFO L225 Difference]: With dead ends: 139 [2020-10-16 11:45:08,656 INFO L226 Difference]: Without dead ends: 133 [2020-10-16 11:45:08,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:45:08,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-16 11:45:08,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-10-16 11:45:08,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 11:45:08,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-10-16 11:45:08,659 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-10-16 11:45:08,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:08,659 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-10-16 11:45:08,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:08,659 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-10-16 11:45:08,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:08,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:08,659 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:08,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:08,860 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:08,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:08,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-10-16 11:45:08,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:08,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430934096] [2020-10-16 11:45:08,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:09,229 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:09,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430934096] [2020-10-16 11:45:09,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727725529] [2020-10-16 11:45:09,230 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:09,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:45:09,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:09,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:09,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:09,306 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:09,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:09,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:09,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600258880] [2020-10-16 11:45:09,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:09,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:09,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:09,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:09,321 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-10-16 11:45:10,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:10,206 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-10-16 11:45:10,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:45:10,207 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:10,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:10,207 INFO L225 Difference]: With dead ends: 136 [2020-10-16 11:45:10,207 INFO L226 Difference]: Without dead ends: 130 [2020-10-16 11:45:10,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 11:45:10,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-16 11:45:10,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-10-16 11:45:10,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:45:10,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-10-16 11:45:10,209 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-10-16 11:45:10,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:10,210 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-10-16 11:45:10,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:10,210 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-10-16 11:45:10,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:10,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:10,210 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:10,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-16 11:45:10,411 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:10,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:10,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-10-16 11:45:10,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:10,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3815889] [2020-10-16 11:45:10,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:10,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3815889] [2020-10-16 11:45:10,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648397732] [2020-10-16 11:45:10,754 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:10,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:45:10,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:10,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:10,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:10,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:10,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:10,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834066722] [2020-10-16 11:45:10,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:10,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:10,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:10,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:10,828 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-10-16 11:45:11,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:11,669 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-10-16 11:45:11,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:45:11,670 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:11,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:11,671 INFO L225 Difference]: With dead ends: 137 [2020-10-16 11:45:11,671 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 11:45:11,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 11:45:11,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 11:45:11,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-10-16 11:45:11,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 11:45:11,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-10-16 11:45:11,674 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-10-16 11:45:11,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:11,674 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-10-16 11:45:11,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:11,675 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-10-16 11:45:11,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:11,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:11,675 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:11,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:11,876 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:11,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:11,876 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-10-16 11:45:11,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:11,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998459057] [2020-10-16 11:45:11,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:12,228 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:12,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998459057] [2020-10-16 11:45:12,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459990662] [2020-10-16 11:45:12,229 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:12,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 11:45:12,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:12,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:12,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:12,339 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:12,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:12,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:12,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149687981] [2020-10-16 11:45:12,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:12,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:12,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:12,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:12,356 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-10-16 11:45:13,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:13,338 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-10-16 11:45:13,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:45:13,339 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:13,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:13,339 INFO L225 Difference]: With dead ends: 134 [2020-10-16 11:45:13,339 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 11:45:13,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 11:45:13,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 11:45:13,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-10-16 11:45:13,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 11:45:13,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-10-16 11:45:13,343 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-10-16 11:45:13,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:13,343 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-10-16 11:45:13,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:13,343 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-10-16 11:45:13,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:13,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:13,343 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:13,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-10-16 11:45:13,548 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:13,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:13,548 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-10-16 11:45:13,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:13,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255627512] [2020-10-16 11:45:13,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:13,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255627512] [2020-10-16 11:45:13,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106437567] [2020-10-16 11:45:13,871 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:13,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:13,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:13,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:13,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:13,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526593763] [2020-10-16 11:45:13,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:13,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:13,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:13,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:13,940 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-10-16 11:45:14,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:14,857 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-10-16 11:45:14,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:45:14,858 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:14,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:14,858 INFO L225 Difference]: With dead ends: 135 [2020-10-16 11:45:14,858 INFO L226 Difference]: Without dead ends: 129 [2020-10-16 11:45:14,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 11:45:14,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-16 11:45:14,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-10-16 11:45:14,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:45:14,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-10-16 11:45:14,861 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-10-16 11:45:14,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:14,861 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-10-16 11:45:14,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:14,862 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-10-16 11:45:14,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:14,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:14,862 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:15,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:15,063 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:15,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:15,064 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-10-16 11:45:15,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:15,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820256321] [2020-10-16 11:45:15,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:15,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820256321] [2020-10-16 11:45:15,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864632352] [2020-10-16 11:45:15,389 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:15,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:45:15,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:15,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:15,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:15,474 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:15,497 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:15,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:15,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:15,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889027150] [2020-10-16 11:45:15,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:15,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:15,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:15,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:15,499 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-10-16 11:45:16,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:16,595 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-10-16 11:45:16,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:45:16,595 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:16,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:16,596 INFO L225 Difference]: With dead ends: 132 [2020-10-16 11:45:16,596 INFO L226 Difference]: Without dead ends: 126 [2020-10-16 11:45:16,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 11:45:16,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-16 11:45:16,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-10-16 11:45:16,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:45:16,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-10-16 11:45:16,599 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-10-16 11:45:16,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:16,599 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-10-16 11:45:16,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:16,599 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-10-16 11:45:16,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:16,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:16,599 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:16,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:16,800 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:16,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:16,801 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-10-16 11:45:16,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:16,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080353558] [2020-10-16 11:45:16,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:17,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080353558] [2020-10-16 11:45:17,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092226056] [2020-10-16 11:45:17,122 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:17,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 11:45:17,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:17,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:17,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:17,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:17,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:17,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075483326] [2020-10-16 11:45:17,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:17,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:17,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:17,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:17,200 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-10-16 11:45:18,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:18,210 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-10-16 11:45:18,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:45:18,211 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:18,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:18,212 INFO L225 Difference]: With dead ends: 133 [2020-10-16 11:45:18,212 INFO L226 Difference]: Without dead ends: 127 [2020-10-16 11:45:18,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 11:45:18,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-16 11:45:18,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-10-16 11:45:18,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 11:45:18,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-16 11:45:18,215 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-10-16 11:45:18,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:18,215 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-16 11:45:18,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:18,215 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-16 11:45:18,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:18,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:18,215 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:18,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:18,416 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:18,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:18,417 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-10-16 11:45:18,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:18,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694670034] [2020-10-16 11:45:18,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:18,731 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:18,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694670034] [2020-10-16 11:45:18,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069689681] [2020-10-16 11:45:18,732 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:18,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:45:18,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:18,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:18,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:18,813 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:18,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:18,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:18,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315237609] [2020-10-16 11:45:18,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:18,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:18,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:18,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:18,832 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-10-16 11:45:20,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:20,047 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-10-16 11:45:20,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:45:20,047 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:20,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:20,048 INFO L225 Difference]: With dead ends: 130 [2020-10-16 11:45:20,048 INFO L226 Difference]: Without dead ends: 124 [2020-10-16 11:45:20,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 11:45:20,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-16 11:45:20,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-10-16 11:45:20,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:45:20,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-16 11:45:20,050 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-10-16 11:45:20,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:20,050 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-16 11:45:20,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:20,051 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-16 11:45:20,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:20,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:20,051 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:20,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:20,255 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:20,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:20,255 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-10-16 11:45:20,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:20,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874536974] [2020-10-16 11:45:20,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:20,566 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:20,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874536974] [2020-10-16 11:45:20,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436899017] [2020-10-16 11:45:20,567 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:20,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:45:20,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:20,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:20,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:20,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:20,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:20,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42680407] [2020-10-16 11:45:20,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:20,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:20,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:20,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:20,645 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-10-16 11:45:21,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:21,742 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-16 11:45:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 11:45:21,743 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:21,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:21,743 INFO L225 Difference]: With dead ends: 131 [2020-10-16 11:45:21,743 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 11:45:21,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 11:45:21,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 11:45:21,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-10-16 11:45:21,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-16 11:45:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-10-16 11:45:21,746 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-10-16 11:45:21,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:21,747 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-10-16 11:45:21,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:21,747 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-10-16 11:45:21,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:21,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:21,747 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:21,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-16 11:45:21,948 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:21,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:21,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-10-16 11:45:21,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:21,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391248183] [2020-10-16 11:45:21,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:22,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391248183] [2020-10-16 11:45:22,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714623011] [2020-10-16 11:45:22,251 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:22,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 11:45:22,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:22,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:22,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:22,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:22,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:22,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:22,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175104711] [2020-10-16 11:45:22,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:22,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:22,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:22,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:22,353 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-10-16 11:45:23,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:23,666 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-10-16 11:45:23,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 11:45:23,667 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:23,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:23,667 INFO L225 Difference]: With dead ends: 128 [2020-10-16 11:45:23,667 INFO L226 Difference]: Without dead ends: 122 [2020-10-16 11:45:23,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 11:45:23,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-16 11:45:23,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-16 11:45:23,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-16 11:45:23,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-16 11:45:23,670 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-10-16 11:45:23,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:23,670 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-16 11:45:23,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:23,670 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-16 11:45:23,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:23,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:23,671 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:23,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-10-16 11:45:23,872 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:23,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:23,872 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-10-16 11:45:23,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:23,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270379183] [2020-10-16 11:45:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:24,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270379183] [2020-10-16 11:45:24,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506525784] [2020-10-16 11:45:24,177 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:24,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:24,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:24,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:24,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:24,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522164318] [2020-10-16 11:45:24,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:24,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:24,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:24,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:24,257 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-10-16 11:45:25,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:25,410 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-10-16 11:45:25,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:45:25,410 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:25,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:25,411 INFO L225 Difference]: With dead ends: 129 [2020-10-16 11:45:25,411 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 11:45:25,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 11:45:25,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 11:45:25,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-10-16 11:45:25,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:45:25,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:45:25,413 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-10-16 11:45:25,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:25,413 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:45:25,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:25,414 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:45:25,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:25,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:25,414 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:25,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-16 11:45:25,615 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:25,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:25,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-10-16 11:45:25,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:25,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749032664] [2020-10-16 11:45:25,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:25,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749032664] [2020-10-16 11:45:25,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011227591] [2020-10-16 11:45:25,925 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:25,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:45:25,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:25,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:25,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:26,006 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:26,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:26,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:26,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154403525] [2020-10-16 11:45:26,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:26,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:26,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:26,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:26,033 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-10-16 11:45:27,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:27,476 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-10-16 11:45:27,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 11:45:27,478 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:27,478 INFO L225 Difference]: With dead ends: 126 [2020-10-16 11:45:27,478 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 11:45:27,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-10-16 11:45:27,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 11:45:27,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-16 11:45:27,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:45:27,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:45:27,481 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-10-16 11:45:27,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:27,482 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:45:27,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:27,482 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:45:27,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:27,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:27,482 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:27,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-16 11:45:27,683 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:27,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:27,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-10-16 11:45:27,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:27,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145663036] [2020-10-16 11:45:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:27,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145663036] [2020-10-16 11:45:27,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764167549] [2020-10-16 11:45:27,984 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:28,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 11:45:28,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:28,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:28,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:28,066 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:28,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:28,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:28,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405794886] [2020-10-16 11:45:28,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:28,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:28,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:28,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:28,068 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-10-16 11:45:29,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:29,302 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-10-16 11:45:29,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-16 11:45:29,303 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:29,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:29,303 INFO L225 Difference]: With dead ends: 127 [2020-10-16 11:45:29,303 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 11:45:29,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 11:45:29,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 11:45:29,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-10-16 11:45:29,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-16 11:45:29,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-16 11:45:29,306 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-10-16 11:45:29,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:29,306 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-16 11:45:29,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:29,307 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-16 11:45:29,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:29,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:29,307 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:29,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:29,508 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:29,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:29,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-10-16 11:45:29,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:29,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814463960] [2020-10-16 11:45:29,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:29,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814463960] [2020-10-16 11:45:29,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144257176] [2020-10-16 11:45:29,819 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:29,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:45:29,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:29,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:29,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:29,902 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:29,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:29,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:29,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90000536] [2020-10-16 11:45:29,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:29,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:29,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:29,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:29,925 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-16 11:45:31,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:31,477 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-10-16 11:45:31,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 11:45:31,478 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:31,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:31,478 INFO L225 Difference]: With dead ends: 124 [2020-10-16 11:45:31,478 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 11:45:31,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-10-16 11:45:31,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 11:45:31,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-10-16 11:45:31,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 11:45:31,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-16 11:45:31,481 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-10-16 11:45:31,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:31,481 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-16 11:45:31,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:31,481 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-16 11:45:31,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:31,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:31,482 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:31,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-16 11:45:31,683 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:31,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:31,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-10-16 11:45:31,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:31,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860953590] [2020-10-16 11:45:31,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:31,985 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:31,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860953590] [2020-10-16 11:45:31,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427632179] [2020-10-16 11:45:31,986 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:32,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:45:32,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:32,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:32,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:32,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:32,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:32,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220884594] [2020-10-16 11:45:32,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:32,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:32,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:32,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:32,070 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-10-16 11:45:33,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:33,387 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-10-16 11:45:33,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-16 11:45:33,388 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:33,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:33,389 INFO L225 Difference]: With dead ends: 144 [2020-10-16 11:45:33,389 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 11:45:33,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-10-16 11:45:33,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 11:45:33,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-10-16 11:45:33,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 11:45:33,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-10-16 11:45:33,391 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-10-16 11:45:33,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:33,392 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-10-16 11:45:33,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:33,392 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-10-16 11:45:33,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:33,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:33,392 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:33,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:33,593 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:33,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:33,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-10-16 11:45:33,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:33,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813013890] [2020-10-16 11:45:33,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:33,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813013890] [2020-10-16 11:45:33,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647646263] [2020-10-16 11:45:33,889 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:33,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 11:45:33,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:33,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:33,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:34,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:34,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:34,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060851198] [2020-10-16 11:45:34,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:34,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:34,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:34,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:34,007 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-10-16 11:45:35,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:35,551 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-10-16 11:45:35,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 11:45:35,552 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:35,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:35,552 INFO L225 Difference]: With dead ends: 125 [2020-10-16 11:45:35,552 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 11:45:35,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1106, Invalid=2800, Unknown=0, NotChecked=0, Total=3906 [2020-10-16 11:45:35,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 11:45:35,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-16 11:45:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-16 11:45:35,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-16 11:45:35,555 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-16 11:45:35,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:35,555 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-16 11:45:35,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:35,555 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-16 11:45:35,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:35,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:35,556 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:35,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-10-16 11:45:35,756 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:35,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:35,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-10-16 11:45:35,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:35,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107069419] [2020-10-16 11:45:35,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:36,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107069419] [2020-10-16 11:45:36,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811471426] [2020-10-16 11:45:36,203 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:36,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:36,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:36,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:36,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:45:36,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314048507] [2020-10-16 11:45:36,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:36,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:36,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:36,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:36,270 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-10-16 11:45:37,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:37,015 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-10-16 11:45:37,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:45:37,017 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:45:37,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:37,017 INFO L225 Difference]: With dead ends: 144 [2020-10-16 11:45:37,017 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 11:45:37,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:45:37,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 11:45:37,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-10-16 11:45:37,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:45:37,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:45:37,020 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:45:37,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:37,021 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:45:37,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:37,021 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:45:37,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:37,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:37,021 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:37,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:37,222 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:37,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:37,223 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-10-16 11:45:37,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:37,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60996893] [2020-10-16 11:45:37,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:37,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60996893] [2020-10-16 11:45:37,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472934271] [2020-10-16 11:45:37,669 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:37,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:45:37,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:37,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:37,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:37,755 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:37,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:37,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:45:37,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600397824] [2020-10-16 11:45:37,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:45:37,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:37,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:45:37,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:45:37,769 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 11:45:38,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:38,620 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-10-16 11:45:38,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:45:38,621 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 11:45:38,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:38,622 INFO L225 Difference]: With dead ends: 141 [2020-10-16 11:45:38,622 INFO L226 Difference]: Without dead ends: 135 [2020-10-16 11:45:38,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:45:38,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-16 11:45:38,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-10-16 11:45:38,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:45:38,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 11:45:38,624 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 11:45:38,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:38,624 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 11:45:38,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:45:38,625 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 11:45:38,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:38,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:38,625 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:38,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2020-10-16 11:45:38,826 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:38,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:38,826 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-10-16 11:45:38,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:38,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790571875] [2020-10-16 11:45:38,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:39,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790571875] [2020-10-16 11:45:39,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363633356] [2020-10-16 11:45:39,242 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:39,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 11:45:39,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:39,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:39,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:39,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:39,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:45:39,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941403987] [2020-10-16 11:45:39,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:39,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:39,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:39,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:39,321 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 11:45:40,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:40,140 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-10-16 11:45:40,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:45:40,142 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:45:40,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:40,142 INFO L225 Difference]: With dead ends: 138 [2020-10-16 11:45:40,142 INFO L226 Difference]: Without dead ends: 132 [2020-10-16 11:45:40,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 11:45:40,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-16 11:45:40,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-10-16 11:45:40,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:45:40,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:45:40,145 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:45:40,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:40,145 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:45:40,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:40,145 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:45:40,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:40,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:40,146 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:40,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:40,347 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:40,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:40,347 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-10-16 11:45:40,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:40,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621560685] [2020-10-16 11:45:40,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:40,768 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:40,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621560685] [2020-10-16 11:45:40,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323426409] [2020-10-16 11:45:40,769 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:40,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:45:40,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:40,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:40,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:40,852 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:40,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:40,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:45:40,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136341391] [2020-10-16 11:45:40,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:45:40,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:40,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:45:40,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:45:40,870 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 11:45:41,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:41,851 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-10-16 11:45:41,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:45:41,852 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 11:45:41,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:41,853 INFO L225 Difference]: With dead ends: 137 [2020-10-16 11:45:41,853 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 11:45:41,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 11:45:41,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 11:45:41,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-10-16 11:45:41,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:45:41,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 11:45:41,856 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 11:45:41,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:41,856 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 11:45:41,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:45:41,856 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 11:45:41,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:41,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:41,856 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:42,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-10-16 11:45:42,057 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:42,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:42,058 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-10-16 11:45:42,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:42,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158398121] [2020-10-16 11:45:42,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:42,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:42,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158398121] [2020-10-16 11:45:42,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72851234] [2020-10-16 11:45:42,456 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:42,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:45:42,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:42,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:42,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:42,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:42,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:45:42,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661585953] [2020-10-16 11:45:42,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:42,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:42,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:42,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:42,532 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 11:45:43,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:43,436 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-16 11:45:43,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:45:43,437 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:45:43,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:43,438 INFO L225 Difference]: With dead ends: 134 [2020-10-16 11:45:43,438 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 11:45:43,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 11:45:43,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 11:45:43,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-10-16 11:45:43,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:45:43,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:45:43,441 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:45:43,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:43,441 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:45:43,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:43,441 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:45:43,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:43,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:43,442 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:43,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-16 11:45:43,651 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:43,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:43,651 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-10-16 11:45:43,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:43,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451227862] [2020-10-16 11:45:43,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:44,053 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:44,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451227862] [2020-10-16 11:45:44,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914677410] [2020-10-16 11:45:44,054 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:44,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 11:45:44,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:44,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:44,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:44,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:44,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:44,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:45:44,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14577502] [2020-10-16 11:45:44,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:45:44,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:44,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:45:44,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:45:44,156 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 11:45:45,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:45,252 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-10-16 11:45:45,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:45:45,254 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 11:45:45,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:45,254 INFO L225 Difference]: With dead ends: 133 [2020-10-16 11:45:45,254 INFO L226 Difference]: Without dead ends: 127 [2020-10-16 11:45:45,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 11:45:45,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-16 11:45:45,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-10-16 11:45:45,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:45:45,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 11:45:45,258 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 11:45:45,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:45,258 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 11:45:45,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:45:45,258 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 11:45:45,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:45,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:45,259 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:45,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-16 11:45:45,464 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:45,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:45,464 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-10-16 11:45:45,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:45,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881915961] [2020-10-16 11:45:45,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:45,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881915961] [2020-10-16 11:45:45,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141044189] [2020-10-16 11:45:45,849 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:45,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:45,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:45,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:45,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:45:45,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337786345] [2020-10-16 11:45:45,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:45,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:45,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:45,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:45,918 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 11:45:46,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:46,903 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-10-16 11:45:46,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:45:46,904 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:45:46,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:46,905 INFO L225 Difference]: With dead ends: 130 [2020-10-16 11:45:46,905 INFO L226 Difference]: Without dead ends: 124 [2020-10-16 11:45:46,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 11:45:46,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-16 11:45:46,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-10-16 11:45:46,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:45:46,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:45:46,908 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:45:46,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:46,908 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:45:46,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:46,908 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:45:46,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:46,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:46,909 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:47,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:47,110 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:47,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:47,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-10-16 11:45:47,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:47,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314962540] [2020-10-16 11:45:47,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:47,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314962540] [2020-10-16 11:45:47,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803131717] [2020-10-16 11:45:47,507 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:47,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:45:47,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:47,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:47,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:47,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:47,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:47,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:45:47,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902906270] [2020-10-16 11:45:47,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:45:47,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:47,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:45:47,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:45:47,610 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 11:45:48,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:48,803 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-10-16 11:45:48,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:45:48,804 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 11:45:48,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:48,804 INFO L225 Difference]: With dead ends: 129 [2020-10-16 11:45:48,805 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 11:45:48,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 11:45:48,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 11:45:48,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-10-16 11:45:48,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:45:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 11:45:48,807 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 11:45:48,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:48,808 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 11:45:48,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:45:48,808 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 11:45:48,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:48,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:48,808 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:49,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-16 11:45:49,009 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:49,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:49,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-10-16 11:45:49,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:49,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493973898] [2020-10-16 11:45:49,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:49,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493973898] [2020-10-16 11:45:49,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7478192] [2020-10-16 11:45:49,373 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:49,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 11:45:49,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:49,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:49,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:49,451 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:49,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:49,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:45:49,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709637121] [2020-10-16 11:45:49,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:49,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:49,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:49,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:49,453 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 11:45:50,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:50,531 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-10-16 11:45:50,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:45:50,532 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:45:50,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:50,532 INFO L225 Difference]: With dead ends: 126 [2020-10-16 11:45:50,533 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 11:45:50,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 11:45:50,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 11:45:50,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-10-16 11:45:50,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:45:50,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:45:50,535 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:45:50,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:50,535 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:45:50,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:50,536 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:45:50,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:50,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:50,536 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:50,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:50,737 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:50,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:50,737 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-10-16 11:45:50,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:50,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271877483] [2020-10-16 11:45:50,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:51,104 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:51,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271877483] [2020-10-16 11:45:51,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934127969] [2020-10-16 11:45:51,105 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:51,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:45:51,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:51,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:51,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:51,193 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:51,211 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:51,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:51,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:45:51,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518869277] [2020-10-16 11:45:51,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:45:51,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:51,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:45:51,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:45:51,212 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 11:45:52,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:52,555 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-10-16 11:45:52,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:45:52,556 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 11:45:52,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:52,557 INFO L225 Difference]: With dead ends: 125 [2020-10-16 11:45:52,557 INFO L226 Difference]: Without dead ends: 119 [2020-10-16 11:45:52,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 11:45:52,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-16 11:45:52,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-10-16 11:45:52,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:45:52,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 11:45:52,560 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 11:45:52,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:52,560 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 11:45:52,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:45:52,560 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 11:45:52,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:52,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:52,560 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:52,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-10-16 11:45:52,767 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:52,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:52,768 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-10-16 11:45:52,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:52,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459214185] [2020-10-16 11:45:52,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:53,129 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:53,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459214185] [2020-10-16 11:45:53,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981996599] [2020-10-16 11:45:53,129 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:53,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:45:53,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:53,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:53,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:53,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:53,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:45:53,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282643539] [2020-10-16 11:45:53,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:53,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:53,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:53,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:53,219 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 11:45:54,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:54,386 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-10-16 11:45:54,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:45:54,387 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:45:54,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:54,388 INFO L225 Difference]: With dead ends: 122 [2020-10-16 11:45:54,388 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 11:45:54,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 11:45:54,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 11:45:54,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-10-16 11:45:54,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:45:54,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:45:54,391 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:45:54,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:54,391 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:45:54,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:54,392 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:45:54,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:54,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:54,392 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:54,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:54,601 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:54,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:54,601 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-10-16 11:45:54,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:54,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918966676] [2020-10-16 11:45:54,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:54,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918966676] [2020-10-16 11:45:54,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192055851] [2020-10-16 11:45:54,972 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:55,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 11:45:55,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:55,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:55,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:55,061 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:55,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:55,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:45:55,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031556105] [2020-10-16 11:45:55,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:45:55,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:55,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:45:55,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:45:55,082 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 11:45:56,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:56,541 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-10-16 11:45:56,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 11:45:56,542 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 11:45:56,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:56,542 INFO L225 Difference]: With dead ends: 121 [2020-10-16 11:45:56,542 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 11:45:56,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 11:45:56,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 11:45:56,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-10-16 11:45:56,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:45:56,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 11:45:56,545 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 11:45:56,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:56,545 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 11:45:56,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:45:56,546 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 11:45:56,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:56,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:56,546 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:56,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-10-16 11:45:56,747 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:56,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:56,747 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-10-16 11:45:56,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:56,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86673541] [2020-10-16 11:45:56,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:57,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86673541] [2020-10-16 11:45:57,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931166088] [2020-10-16 11:45:57,102 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:57,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:57,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:57,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:57,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:45:57,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190990192] [2020-10-16 11:45:57,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:57,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:57,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:57,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:57,185 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 11:45:58,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:58,443 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-10-16 11:45:58,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 11:45:58,444 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:45:58,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:58,444 INFO L225 Difference]: With dead ends: 118 [2020-10-16 11:45:58,445 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 11:45:58,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 11:45:58,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 11:45:58,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-10-16 11:45:58,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:45:58,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:45:58,447 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:45:58,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:58,447 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:45:58,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:58,448 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:45:58,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:58,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:58,448 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:58,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:58,649 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:58,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:58,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-10-16 11:45:58,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:58,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065811056] [2020-10-16 11:45:58,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:59,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065811056] [2020-10-16 11:45:59,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761625482] [2020-10-16 11:45:59,008 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:59,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:45:59,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:59,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:59,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:59,094 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:59,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:59,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:45:59,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845028113] [2020-10-16 11:45:59,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:45:59,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:59,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:45:59,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:45:59,117 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 11:46:00,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:46:00,709 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-10-16 11:46:00,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 11:46:00,711 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 11:46:00,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:46:00,711 INFO L225 Difference]: With dead ends: 117 [2020-10-16 11:46:00,712 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 11:46:00,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 11:46:00,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 11:46:00,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-10-16 11:46:00,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:46:00,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 11:46:00,714 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 11:46:00,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:46:00,714 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 11:46:00,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:46:00,715 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 11:46:00,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:46:00,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:46:00,715 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:46:00,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:46:00,916 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:46:00,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:46:00,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-10-16 11:46:00,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:46:00,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099514279] [2020-10-16 11:46:00,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:46:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:46:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:46:01,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099514279] [2020-10-16 11:46:01,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970855872] [2020-10-16 11:46:01,268 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:46:01,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 11:46:01,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:46:01,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:46:01,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:46:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:46:01,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:46:01,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:46:01,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465566892] [2020-10-16 11:46:01,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:46:01,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:46:01,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:46:01,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:46:01,350 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 11:46:02,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:46:02,701 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-10-16 11:46:02,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:46:02,702 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:46:02,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:46:02,703 INFO L225 Difference]: With dead ends: 114 [2020-10-16 11:46:02,703 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 11:46:02,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-10-16 11:46:02,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 11:46:02,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-10-16 11:46:02,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:46:02,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:46:02,706 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:46:02,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:46:02,706 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:46:02,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:46:02,707 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:46:02,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:46:02,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:46:02,707 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:46:02,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-16 11:46:02,908 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:46:02,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:46:02,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-10-16 11:46:02,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:46:02,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732498317] [2020-10-16 11:46:02,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:46:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:46:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:46:03,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732498317] [2020-10-16 11:46:03,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418236901] [2020-10-16 11:46:03,258 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:46:03,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:46:03,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:46:03,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:46:03,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:46:03,343 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:46:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:46:03,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:46:03,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:46:03,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520106932] [2020-10-16 11:46:03,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:46:03,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:46:03,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:46:03,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:46:03,374 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. Received shutdown request... [2020-10-16 11:46:03,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:46:04,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-16 11:46:04,109 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-16 11:46:04,113 WARN L235 ceAbstractionStarter]: Timeout [2020-10-16 11:46:04,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 11:46:04 BasicIcfg [2020-10-16 11:46:04,114 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 11:46:04,115 INFO L168 Benchmark]: Toolchain (without parser) took 265665.69 ms. Allocated memory was 148.4 MB in the beginning and 200.3 MB in the end (delta: 51.9 MB). Free memory was 103.6 MB in the beginning and 89.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 66.1 MB. Max. memory is 7.1 GB. [2020-10-16 11:46:04,116 INFO L168 Benchmark]: CDTParser took 0.47 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-16 11:46:04,116 INFO L168 Benchmark]: CACSL2BoogieTranslator took 739.52 ms. Allocated memory was 148.4 MB in the beginning and 203.9 MB in the end (delta: 55.6 MB). Free memory was 103.4 MB in the beginning and 163.1 MB in the end (delta: -59.6 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. [2020-10-16 11:46:04,117 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.55 ms. Allocated memory is still 203.9 MB. Free memory was 163.1 MB in the beginning and 161.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-10-16 11:46:04,117 INFO L168 Benchmark]: Boogie Preprocessor took 32.63 ms. Allocated memory is still 203.9 MB. Free memory was 161.1 MB in the beginning and 159.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-16 11:46:04,117 INFO L168 Benchmark]: RCFGBuilder took 410.17 ms. Allocated memory is still 203.9 MB. Free memory was 159.8 MB in the beginning and 139.3 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2020-10-16 11:46:04,118 INFO L168 Benchmark]: TraceAbstraction took 264420.39 ms. Allocated memory was 203.9 MB in the beginning and 200.3 MB in the end (delta: -3.7 MB). Free memory was 138.6 MB in the beginning and 89.4 MB in the end (delta: 49.2 MB). Peak memory consumption was 45.5 MB. Max. memory is 7.1 GB. [2020-10-16 11:46:04,120 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 739.52 ms. Allocated memory was 148.4 MB in the beginning and 203.9 MB in the end (delta: 55.6 MB). Free memory was 103.4 MB in the beginning and 163.1 MB in the end (delta: -59.6 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 52.55 ms. Allocated memory is still 203.9 MB. Free memory was 163.1 MB in the beginning and 161.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.63 ms. Allocated memory is still 203.9 MB. Free memory was 161.1 MB in the beginning and 159.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 410.17 ms. Allocated memory is still 203.9 MB. Free memory was 159.8 MB in the beginning and 139.3 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 264420.39 ms. Allocated memory was 203.9 MB in the beginning and 200.3 MB in the end (delta: -3.7 MB). Free memory was 138.6 MB in the beginning and 89.4 MB in the end (delta: 49.2 MB). Peak memory consumption was 45.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 488 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.4s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - TimeoutResultAtElement [Line: 703]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 703). Cancelled while BasicCegarLoop was constructing difference of abstraction (93states) and FLOYD_HOARE automaton (currently 16 states, 25 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 39 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 264.2s, OverallIterations: 234, TraceHistogramMax: 10, AutomataDifference: 149.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 3724 SDtfs, 13026 SDslu, 25234 SDs, 0 SdLazy, 27153 SolverSat, 15144 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13100 GetRequests, 4322 SyntacticMatches, 229 SemanticMatches, 8548 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84887 ImplicationChecksByTransitivity, 153.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=217, 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, 233 MinimizatonAttempts, 5954 StatesRemovedByMinimization, 232 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7s SsaConstructionTime, 5.4s SatisfiabilityAnalysisTime, 50.8s InterpolantComputationTime, 9850 NumberOfCodeBlocks, 9850 NumberOfCodeBlocksAsserted, 1218 NumberOfCheckSat, 9387 ConstructedInterpolants, 0 QuantifiedInterpolants, 920851 SizeOfPredicates, 3071 NumberOfNonLiveVariables, 30011 ConjunctsInSsa, 3998 ConjunctsInUnsatCore, 463 InterpolantComputations, 5 PerfectInterpolantSequences, 0/20130 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